Consumer Electronics

1. Input: 9V-36V2. Output: 5V / 3A (MAX)3. Efficiency: 92% (MAX)4. Switching frequency: 150KHZ5. Operating temperature: -40 degree C - + 85 degree C 6. Load capacity: Maximum output 3A (at the same time with two mobile phones)7. Application: mobile power, mobile phones, flat-panel USB5V powered devices8. Model: LDTR-WG02579. Material: PCB + Electronic Components10. Weight: 27g 11. Size: 7cm x 2.2cm x 2.5cm12. Package included: 1 x DC Power Module

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Features1. Input voltage range: DC 10V-60V2. Rated current: continuous operating current within 6A3. Function: control DC brush motor speed, forward, stop, reverse4. Installation method: panel type, and wiring according to wiring diagram5. Brand: Landa tianrui6. Model: LDTR-WG02657. Material: FR-48. Dimensions: 9.8 cm * 9.1cm* 6cm9. Weight: 124 g10. Package Included: 1 x Motor Speed ControllerNote1. The input of the DC motor governor is DC, and it cannot be directly connected to AC (for example, household 220V AC), otherwise it will burn out.2. The positive and negative poles of the DC power cannot be reversed, otherwise the governor will be bad.3. The motor is not divided into positive and negative. When the running direction is inconsistent with the expectation, the direction can be changed by adjusting the line sequence.4. The potentiometer knob can change the governor output duty cycle, thus changing the motor speed.

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Features1. The potentiometer adjusts the volume with a switch for easy control of the volume, making it good for DIY speakers.If it is a metal box, you need to bring out the Bluetooth antenna. 2. The copper DC connector is used to withstand high current and no heat. 3. Capacitor 470uf35V solid capacitors ensure power storage and heat dissipation, and stable power supply is a prerequisite for good sound quality. 4. Free DC head lead, compatible with the input power interface of this product, even if you do not have a DC head adapter or battery, it can be easily wired. 5. Bluetooth 5.0 version, the transmission efficiency is higher, the transmission distance is farther. Precautions for use: The power switch on the board is the standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug the DC plug on the machine for a long time.Specification1. Material: ABS plastic 2. Bluetooth version: 5.0 3. Adaptation supply voltage: 5-24V(optional 9/12/15/18/24V adapter, high power recommended high voltage) 4. Adapter speaker: 30-200W, 4 ohms, 8 ohms 5. Number of channels: Left and right stereo(stereo) 6. Bluetooth transmission distance: 15m(without occlusion) 7. Protection mechanism: Self-recovery overheat protection, self-recovery short circuit protection 8. Size: 55 x 38 x 17mm Tip: To have enough out put power if the input is sufficient and the supply voltage/current is sufficient. The power supply voltage is higher and the relative power will be larger. The speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the ohms of the horn, the smaller the relative sound powre. Please pay attention! Power supply voltage: 12V--8 ohm speaker/12W(left channel) + 12W(right channel), 4 ohm speaker/20W + 20W 15V--8 ohms/18 + 18W, 4 ohms/greater than 30 + 30W 19V--8 ohms/32 + 32W, 4 ohms/greater than 45 + 45W 24V--8 ohms/38 + 38W, 4 ohms/greater than 50 + 50W

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Features1. The potentiometer adjusts the volume with a switch for easy control of the volume, making it good for DIY speakers.If it is a metal box, you need to bring out the Bluetooth antenna. 2. The copper DC connector is used to withstand high current and no heat. 3. Capacitor 470uf35V solid capacitors ensure power storage and heat dissipation, and stable power supply is a prerequisite for good sound quality. 4. Free DC head lead, compatible with the input power interface of this product, even if you do not have a DC head adapter or battery, it can be easily wired. 5. Bluetooth 5.0 version, the transmission efficiency is higher, the transmission distance is farther. Precautions for use: The power switch on the board is the standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug the DC plug on the machine for a long time.Specification1. Material: ABS plastic 2. Bluetooth version: 5.0 3. Adaptation supply voltage: 5-24V(optional 9/12/15/18/24V adapter, high power recommended high voltage) 4. Adapter speaker: 30-200W, 4 ohms - 8 ohms 5. Number of channels: Left and right stereo(stereo) 6. Bluetooth transmission distance: 15m(without occlusion) 7. Protection mechanism: Self-recovery overheat protection, self-recovery short circuit protection 8. Size: 55 x 38 x 17mm Tip: To have enough out put power if the input is sufficient and the supply voltage/current is sufficient. The power supply voltage is higher and the relative power will be larger. The speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the ohms of the horn, the smaller the relative sound powre. Please pay attention! Power supply voltage: 12V--8 ohm speaker/12W(left channel) + 12W(right channel), 4 ohm speaker/20W + 20W 15V--8 ohms/18 + 18W, 4 ohms/greater than 30 + 30W 19V--8 ohms/32 + 32W, 4 ohms/greater than 45 + 45W 24V--8 ohms/38 + 38W, 4 ohms/greater than 50 + 50W

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1. Metal gear, stable transmission and wear-resistant2. Pure copper motor, effectively insulates dust and high temperature3. 304 stainless steel folding, high-precision gear box4. Features: Durable, dust-proof, anti-skid, high temperature resistance, abrasion resistance5. Rated voltage: 6/12v6. Application: electronic locks, smart cars, robots, cameras, etc.7. Size: about 14x17x35mm8. Material: 304 stainless steel

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1. Metal gear, stable transmission and wear-resistant2. Pure copper motor, effectively insulates dust and high temperature3. 304 stainless steel folding, high-precision gear box4. Features: Durable, dust-proof, anti-skid, high temperature resistance, abrasion resistance5. Rated voltage: 6/12v6. Application: electronic locks, smart cars, robots, cameras, etc.7. Size: about 14x17x35mm8. Material: 304 stainless steel

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1. 320x480 resolution, resistive touch control, 8:5 aspect ratio. 2. Supports any revision of Raspberry Pi (directly-pluggable). 3. Drivers provided (works with your own Raspbian/Ubuntu directly). 4. Size perfectly fits the Pi. 5. High quality immersion gold surface plating. 6. Support Raspbian system, enables your system to: - Take photos by touching (up to 17 camera modes). - Support software keyboard (system interaction without keyboard/mouse). 7. 3.5 inch RPi LCD (A) and 3.5 inch RPi LCD (B) are hardware compatible with each other (uses different driver), and can be mutually substituted in most cases. (A) for low cost ver. while (B) for IPS ver. with better displaying.

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1. Package includes: RFID-RC522 module X1, standard S50 blank card X1, S50 special-shaped card (as shown in the shape of the key ring); a straight row and a bent row of pins;2. Working current: 13-26mA / DC 3.3V3. Idle current: 10-13mA / DC 3.3V4. Sleep current: <80uA5. Peak current: <30mA6. Working frequency: 13.56MHz7. Supported card types: Mifare1 S50, mifare1 S70, mifare UltraLight, mifare Pro, mifare Desfire8. Product physical characteristics: Size: 40mm × 60mm9. Ambient working temperature: -20-80 degrees Celsius10. Environmental storage temperature: -40-85 degrees Celsius11. Environmental relative humidity: Relative humidity 5% -95%12. Module interface SPI parameters: Data transmission rate: maximum 10Mbit / s13. This module can be directly loaded into various card reader molds. The module uses a voltage of 3.3V. It can be directly connected to any CPU motherboard of the user through a few lines of SPI interface, which can ensure the stable and reliable operation of the module and the distance of card reading.

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Main Features: 1. Brand new Ultrasonic Sensor HC-SR04 Distance Measuring Module 2. Features 4-mode connections: VCC / trig (T) / echo(R) / GND 3. With electric frequency output signal from 0V to 5V 4. Has high precision up to 3mm 5. 5VDC power supply 6. Detecting distance is from 2cm to 450cm Module Working Principle: 1. Adopt IO trigger through supplying at least 10us sequence of high level signal 2. The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal 3. If there is signal returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving

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Type:Voltage Regulator1. Packaging Electrostatic bag2. It use the same as official R3 board3. Use: Instrument4. Power supply voltage: 5v~9v5. Output voltage: 5V DC voltage output and 3.3V DC voltage output6. Plug in the development board, the driver will be installed automatically7. Select the board in die8. Select the COM port, this can be queried in my computer, just the port inside your development board9. It is best to choose the program that comes with it, PROGRAMMER it in.10. Added pin header, easy to use

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Overview Due to the advantages of ultra-low power consumption, wide viewing angle, and clear display without electricity, it is an ideal choice for applications such as shelf labels and industrial instruments. Features 1. Without backlight, the last content can be displayed for a long time even if it is turned off 2. Ultra-low power consumption, basically only need to refresh the power supply 3. Attached with development resources and manuals (example of Arduin-esp32) Product specifications 1. Working voltage: 3.3V 2. Interface: 3-wire SPI, 4-wire SPI 3. Display color: black, white 4. Grayscale: 2 5. Full refresh time: 8s 6. Refresh power: 26.4mW (typical value) 7. Driver chip: DEPG0213BN ESP32 features: 1. Immersion Gold Craft 2. High cost performance 3. Small size, easy to embed other products 4. Powerful function supports LWIP protocol, Freertos 5. WiFi supports three modes: AP, STA and AP + STA 6. Support Windows system (cygwin and msys32) and Linux system 7. Support Arduino-ide, ESP-IDF, Micropython multiple development environments 8. Support Lua program, easy development

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Features1. Using Bluetooth 5.0 main control chip, good transmission effect and high stability 2. With button control, there are control up and down music, volume addition and subtraction, playback, pause, switch machine, etc., and reserved high and low level control interfaces, regardless of daily use, and DIY modification, it is very playable 3. Micro 5 Pin interface power supply, ordinary mobile phone charger charging cable can be used. 4. Product use: Bluetooth audio signals from mobile phones, laptops, and tablets can be transmitted to power amplifiers, active speakers and other devices through this Bluetooth audio receiver. The audio interface can also be connected to ordinary headphones with a 3.5mm interface. The headset becomes a Bluetooth headset (without a microphone, voice chat is not supported)Specification1. Power interface: Micro 5 Pin (reserved 2.5mm welding port, this model does not support battery power supply) 2. Input voltage: 3.7V-5V 3. Signal-to-noise ratio: 90DB 4. THD+N: -70DB 5. Crosstalk: -86db 6. DNR: 91dB 7. Transmission protocol: A2DP/AVCTP/AVDTP/HFP 8. Transmission distance: about 10 meters (the shorter the distance, the better the stability) 9. Output interface: 3.5mm stereo (reserved soldering points, you can DIY by yourself) 10 Dimensions: 30mm x 30mm

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1. The cooling fan with fan case. 2. Cooling fan fit for Raspberry Pi 3B / 2B / B+. 3. Install it on your mini computer case. 4. It helps to exhaust the hot air from inside the computer case. Improve air flow in your system. Cool down the entire case. Extend your system life span and make the computer work better.

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About the ProductThis 3.5 inch touch screen module is designed especially for Raspberry Pi, using the latest Linux Core system (vision 3.18.9), the latest Raspberry Pi official UI desktop file system and the fastest SPI transmission data, an ideal alternative solution for HDMI monitor and convenient Men-Machine interface for Raspberry Pi, combined with the portable power, DIY anywhere anytime.Features1. LCD Interface: SPI. 2. Touch Screen Controller: XPT2046. 3. Backlight: LED. 4. LCD Type: TFT. 5. Resolution: 320*480 DOTS. 6. Core System: vision 3.18.9. 7. SPI Speed: 32MHz. 8. Color Levels Index: 65536. 9. Power Consumption/Backlight Current: TBD. 10. Supports Raspbian system, enables your system to: - Play videos (supports multi formats, MP4 and so on). - Take photos by touching (up to 17 camera modes). - Support software keyboard (system interaction without keyboard/mouse). - Support driver is installed automatically.

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1. 5 million pixels mini camera. 2. Support 1080P resolution. 3. Static picture resolution is 2592 x 1944. 4. Support 1080P 30, 720P 60 and 640x480P 60 / 90 video recording.

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1. 5 million pixels camera. 2. Support 1080P resolution. 3. Static picture resolution is 2592 x 1944. 4. Support 1080P 30, 720P 60 and 640x480P 60 / 90 video recording. 5. The product is used for Raspberry Pi 3 / 2 / B+.

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Measurement range: -18 °C ~ 1150 °C ( 0 °F ~2102°F ) Accuracy: -18°C ~ 0°C( ± 3°C), 0°C ~100°C (± 1.5°C), 100°C~1150°C (±1.5%) Repeatability: 1 °C or 1% of reading Resolution: 0.1°C or 0.1°F Response Time: 500mSec, 95% response Emissivity : 0.1~1.00 adjustable Distance To Spot Ration: 50:1 Spectral response: 8~14μm Storage Temperature: -20°C ~ 60°C ( -4 °F ~140 °F ) Operating Temperature: 0°C ~ 40°C ( 32 °F ~104 °F ) Operating Humidity: 10-95% RH non-condensing, up to 30°C (86°F )

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featureThe device is standardized and accurate and easy to read. Digital displays are fast and easy to read.Product specifications1. Apply sugarSodium chloride NaClsalinitysalinityproportionRefractive index2. Measurement range:Salinity: 0.0~28.0%Salinity: 0~280‰Proportion: 1.000~1.217Refractive index: 1.3330-1.4200nD3. Salt absorptionSalinity: 0.1%Salinity: 1‰Specific gravity: 0.001Refractive index: 0.0001nD4. AccuracySalinity: ±0.2%Salinity: ±2‰Specific gravity: ±0.002Refractive index: ±0.0003nD

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Features Color-screen display, user-friendly interface.Bilingual choices:Chinese/English.Three alarm forms:sound/light/vibration .Data recording and review function, continuously record120,000 data logging.Charging function. Specification Gas detection:COMeasurement Range: 0~100μmo/molResolution: 1 Accuracy: When the measuring range is(0~50)mol/mol,maximum allowable error is:5mol/mol.When the measuring range is(50~1000)mol/mol,maximum allowable error is:10%Indication model:LCD display real-time date and system state,LED,sound,vibration indication alarm Response Time(90%): Less than 30 seconds Alarm: Sound and light vibration alarm Alarm Point: Adjustable Working Voltage: DC3.7V, 1800mAh Battery Model: LP103450-1800mAh rechargeable lithium batteryExplosion-proof Certificate NO.: CNEx 18.5122Explosion-proof Mark: Ex ib IIB T3 GbOperating Conditions: -20～50℃ / -4～122℉, < 95%Storage Conditions: -10～55℃ / 14～122℉, < 85%charging time:6-8hstandby time:more than 8h on end (slightly change with working state)Weight: 215.4g(with battery and back buuton)Item Size: 71 * 153* 49mm Package included 1 * Carbon Monoxide Monitor1 * Plastic Pipe1 * USB Cable1 * Gas Calibration Cover1 * Storage Box1 * User Manual

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Features 1.Color-screen display, user-friendly interface.2.Bilingual choices:Chinese/English.3.Three alarm forms:sound/light/vibration .4.Data recording and review function, continuously record5.120,000 data logging.6.Charging function. Specification Compound Gas Monitor Range Measuring item and Unit 1.Combustible gas LEL %LEL2.Oxygen O2 %VOL3.Hydrogen sulfide H2S μmol/mol4.Carbon Monoxide CO μmol/molRange:1.Combustible gas LEL: 0~1002.Oxygen O2 : 0~303.Hydrogen sulfide H2S:0~100 4.Carbon Monoxide CO :0~1000Resolution1.Combustible gas LEL: 0.12.Oxygen O2 : 0.13.Hydrogen sulfide H2S:0.14.Carbon Monoxide CO :1Accuracy: When the measuring range is(0~50)mol/mol,maximum allowable error is:5mol/mol.When the measuring range is(50~1000)mol/mol,maximum allowable error is:10%Indication model:LCD display real-time date and system state,LED,sound,vibration indication alarm Response Time(90%): Less than 30 seconds Alarm: Sound and light vibration alarm Alarm Point: Adjustable Working Voltage: DC3.7V, 1800mAh Battery Model: LP103450-1800mAh rechargeable lithium batteryExplosion-proof Certificate NO.: CNEx 18.5122Explosion-proof Mark: Ex ib IIB T3 GbOperating Conditions: -20～50℃ / -4～122℉, < 95%Storage Conditions: -10～55℃ / 14～122℉, < 85%charging time:6-8hstandby time:more than 8h on end (slightly change with working state)Item Size: 71 * 153* 49mm Package included 1 * Carbon Monoxide Monitor1 * Plastic Pipe1 * USB Cable1 * Gas Calibration Cover1 * Storage Box1 * User Manual

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Brand Name:SNDWAYInduction range:More than 50cm1. Positioning is blocked within 5cm, greatly reducing the removal area2. With 4 sets of waterproof probe sets to be replaced, all kinds of environments can cope3. 50cm signal penetration, using smart chip, the induction is stronger4. Sensitivity can be adjusted, increase the size of the induction blockage point, together with a large sound buzzer, small, small range of accurate positioning of the blockage point, can clearly distinguish the blockage position5. Built-in lithium battery, straightforward and convenient

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Features:1. With magnet adsorption2. Four-digit display for large range3. With waterproof, digital storage, lock, automatic shutdown functions4. New appearance, classic fashion designTechnical Parameters:1. Measuring range EC: 0-9999uS2. Temperature: 0-80 degrees Celsius; 32-176 degrees Fahrenheit3. Accuracy: +/-2﹪4. Battery: CR2032 button battery x1 (delivered with battery)5. Size: 15 x 2.8x 1.3cm6. Weight: 42.5 g (1.5 oz)7. Purpose: Water treatment, purification equipment, household water purifier, flower aquarium

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1. The high linear scales is designed, high , stable and accurate. 2. The signal line adopts multi-layer isolation steel and metal soft shell protection, waterproof and anti-interference fine. 3. Easy to install and maintain, waterproof, dust-proof good, long service life. 4. Widely used, high stabilization, capacity of resisting disturbance well. 5. Suitable for JCS900-2AE / JCS900-3AE data display instrument. 6. Material: metal 7. Accuracy: +-5um 8. Resolution: 5um 9. Measuring Range: 0mm-100mm

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1. The high linear scales is designed, high , stable and accurate. 2. The signal line adopts multi-layer isolation steel and metal soft shell protection, waterproof and anti-interference fine. 3. Easy to install and maintain, waterproof, dust-proof good, long service life. 4. Widely used, high stabilization, capacity of resisting disturbance well. 5. Suitable for JCS900-2AE / JCS900-3AE data display instrument. 6. Material: metal 7. Accuracy: +-5um 8. Resolution: 5um 9. Measuring Range: 0mm-300mm

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1. The high linear scales is designed, high, stable and accurate. 2. The signal line adopts multi-layer isolation steel and metal soft shell protection, waterproof and anti-interference fine. 3. Easy to install and maintain, waterproof, dust-proof good, long service life. 4. Widely used, high stabilization, capacity of resisting disturbance well. 5. Suitable for JCS900-2AE / JCS900-3AE data display instrument. 6. Material: metal 7. Accuracy: +-5um 8. Resolution: 5um 9. Measuring Range: 0mm-800mm

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1. The high linear scales is designed, high , stable and accurate. 2. The signal line adopts multi-layer isolation steel and metal soft shell protection, waterproof and anti-interference fine. 3. Easy to install and maintain, waterproof, dust-proof good, long service life. 4. Widely used, high stabilization, capacity of resisting disturbance well. 5. Suitable for JCS900-2AE / JCS900-3AE data display instrument. 6. Material: metal 7. Accuracy: +-5um 8. Resolution: 5um 9. Measuring Range: 0mm-900mm

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1. Use a 9V battery2. Measuring range: 0-5003. Resolution: 1.0mm4. Measuring accuracy: ±0.2mm5. Wide adaptability6. Low consumption, durable7. Accurate measurement and clear reading8. Fast detection speed and high sensitivity9. Adapt to the water quality of various environments and regions10. Scope of use: tunnel lining, bridges, slopes, docks, gates, continuous walls11. The use of anti-grading excitation circuit and corrosion-resistant electrode can effectively prevent the electrode from oxidizing and rusting, and keep the sensitivity unchanged for long-term use12. Size: 30x43x14.5cm13. Net weight: 2.7kg for 10 meters, 3.3kg for 20 meters, 2.85kg for 30 meters, 2.95kg for 50 meters, 4.3kg for 100 meters

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Test content: O3+AQI+Temperature+Humidity 1. Electrochemical sensor 2. TFT LCD screen display 3. Resolution: 320 x 240 pixels 4. It can be used in office, indoor outdoor and detection of ozone residue after disinfection. 5. 24 hours real time monitoring 6. Power supply: Built-in Li-battery 2000mAh 7. Material: ABS with TFT Screen 8. Color: Black & Orange 9. Detection data range: O3(0-50ppm) 10. Size : 164 x 74 x 26mm

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1. Material: ABS housing 2. Features: Testing gauss, keep you away from radiation , good for your health 3. Special Functions: 5-LED indicators, each represent different value of radiation; Easy to use; Powered by 1 x 9V (included) 4. Application Monitoring: 50/ 60Hz frequency 5. Other: Dark green 0 to 1.5 milliGauss; Light green 1.5 to 2.5 milliGauss; Yellow 2.5 to 10 milliGauss; Orange 10 to 20 milliGauss; Red 20+ milliGauss 6. Size: 14.3 x 5.3 x 2.9cm

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1. Model: GM510 2. With11unitsto select:bar,mbar,kPa,kgf/cm2,mmHg,cmH2O,Ozf/in2,psi,inHg,inH2O,ftH2O. 3. USB dara hold. 4. USB interface 5. Low battery indicator function 6. Auto power off. 7. A computer through a USB adapter,can be used to record special software for data analysis

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1. Ergonomically designed to fit wearing in finger 2. Portable, compact design, Light weight, easy for carry 3. With luminous function, clear to see, lower consumption Specifications: 1. Brand Name: RV77 2. DIY Supplies: Electrical 3. Type:5-digit Counters 4. Material: Plastic 5. Color: Random 6. Size: 3.8x3x1.8cm 7. Weight: 17g Package Included: 1 x Counter

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With LCD Screen Or Not:Yes Gas Type:Alcohol Resolution ratio: :0.1 Reaction time: :1 (s) Power supply: :2 x AAA battery(Not Included) Weight: :70 g Support::Dropship Features: 1. Detection range:0.000% - 0.199% BAC / 0.000-0.995 mg/l 2. Digital display results (% BAC / mg /l) 3. Quick response and recovery. 4. Automatic power outage. 5. Orange back-light. 6. Low voltage indicator. Specifications: 1. Resolution ratio: 0.1 2. Reaction time: 1 (s) 3. Power supply: 2 x AAA battery(Not Included) 4. Weight: 70g Instructions: 1. Press the switch once, the LCD screen of the tester will turn on the lights, and it will send out a "noise". 2. The state of warm up number will jump from 10 to 0, and after the state blow 10 jumps to 0, the preheating program will be completed. 3. When the countdown is 6 seconds, the mouth is close to the breath test sensor and exhaled for 3-5 seconds to the sensor. 4. The screen can read the test results.

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1. Model: ME-9101 2. Type: Wobble Stick Type, Automatic Reset 3. Power: AC 250V, 5A / DC: 115V, 0.4A 4. Mounting Hole Diameter: 4.5mm 5. Hole Center Point Distance: 56mm x 21mm 6. Stick Length: 90mm (70mm distance adjustable) 7. Body Dimension: 88 x 28 x 25mm 8. Color: Black & Blue 9. Material: Plastic, Metal & Rubber 10.Weight: 64g

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1. Material: Aluminum Shell, ABS Shell 2. Spring force is uniform and stable, fine grinding closure is good. 3. Pressure handle, circular measurement, with metric-British conversion function 4. LCD screen display, easy to use 5. Suitable for measuring all kinds of planar soft materials, such as leather, paper, film, sponge, wire, etc. 6. Size: 120*100mm

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RZ230 Paint Film Meter Tester Coating Measure Thickness Gauge Digital Portable Mini Thickness Gauge TesterIntroductions:The thickness gauge is used to measure the thickness of the plated and coatedsheeton metal, e.g. paint/enamel/ chrome on steel, paint and anodizing coating on aluminum/copper.The gauge takes the precision integrated probe, and uses principles of electro-magnetic inductionand the eddy current effect, which automatically detects the attributeof substrates. Application Field:The Gauge is designed for non-destructively measuring the thickness of coating and painting. It is essential for material surface treatment and widely used in manufacturing industry, metal-processing industry, chemical industry, commodity inspection area, and also able to work steadily in the laboratory, workshop and outdoor. Operating Principle:Thegauge adopts the principle of electromagnetic induction and eddy current effect.It has F probe and N probe.F probe works on the magnetic induction principle and should be used for detecting the non-magnetic coating’s thickness such as chrome/copper/zinc/varnish/rubber on the iron/steel substrate.N probe works on the eddy current principle and should be used for detecting the insulating coating’s thickness such as paint/anodizing/ceramics on the aluminum/copper/brass substrate.

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It transmits at a constant speed and distinguishes the waves reflected from the back of the instrument.2. It can also be widely used in manufacturing, metal processing, commodity inspection and other materials that allow ultrasonic waves.3. Ultrasonic thickness gauge is suitable for materials that conduct and reflect constant sound waves, such as metal, plastic, ceramic, glass, etc.4. The intelligent hand-held ultrasonic thickness gauge is controlled by microprocessor, which can measure the thickness quickly and accurately, and has the sound of various materials, without the need of ultrasonic measurement damage.5. The tool is capable of accurately measuring parts in different materials or industrial production, as well as monitoring pressure vessels in pipes and production equipment, and the degree of corrosion of various parts.6. Measurement range: 1.00 -300.0mm7. Data Storage: 15008.8.3 1.2V nickel-metal hydride rechargeable battery but not equipped

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1. Air Velocity & Temperature Measurement；2. Max/Average/Current air velocity measurement;3. ℃/℉ Temperature unit selection;4. Five units of air velocity:M/s, Km/h, ft/min, Knots, mph5. Beaufort scale;6. Backlight display;7. Manual/Auto power shut off;8. Wind chill indication;9. Low battery indication.B. LCD

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Features1. Measurement of wind velocity, temperature and flow 2. Unit conversion of wind velocity,temperature and flow 3. Measurement of MAX and MIN wind velocity 4. Measurement of 2/3V max and average wind flow 5. Data holding,storing and deleting function 6. Low battery indicating function 7. Auto power off function (power off autocratically if no further operation for 10 minutes) 8. Large LCD display, backlight 9. Retractable drag rodSpecification1. Measuring Range: - Air Velocity: 0-45m/s, 0-140km/hr, 0-8800Ft/min, 0-88 knots, 0-100mph(accuracy +/-3%) - Air Temperature: 0 degree C~+45 degree C, 32 degree F-113 degree F(Accuracy+/-2 degree C) 2. Resolution: 1 degree C, 0.1m/s 3. Units of velocity: m/s.ft/min, knots, km/hr, mph 4. Power supply: 4 x 1.5V AAA battery (not included)

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1. Moisture measurement range: 0-50% 2. Temperature measurement range: 0-50 degree C / 32-122 degree F 3. Measurement error / moisture value: +/-1.5 4. Temperature value: +/- 2 degree C / +/- 3.6 degree F 5. Wood density range : 0.27-1.05g/cm3 6. Detection depth: 0-50mm 7. The moisture response speed: 2s 8. Displayer: LCD 9. Runs on one 9V battery 10. Data hold function (memory function) 11. Moisture limit value setting 12. Battery level indication 13. Auto power-off function

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Description: 1) Measurement through HF electromagnetic sensing 2) 10 different timber density at option 3) Automatic temperature compensation 4) Setting of upper limit of moisture content ratio, prompting of overrunning 5) Ultra-large LCD ensuring clear readings 6) Automatic prompting of low voltage Specifications: 1) MODEL: MD918 2) Measuring Range: 4%~80% 3) Max. Error: +/- 1%Rh+0.5 4) Resolution: 0.5% 5) Battery: 3 x 1.5V AAA battery (not included) 6) Size: 13.2cm x 6.7cm x 2.6cm

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1. Measurement range: 2~40%/50%/60%/70% 2. Emissivity: 0.5 preset 3. Humidity range: 20%RH~90%RH 4. The moisture response speed: 1s 5. Displayer: LCD 6. Reading lock 7. Environment temperature automatic compensation 8. Power: 2 x 1.5V AAA battery (not included)

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1. Easy-to-use. Just put the test pen into the water you want to test and press the button, then the TDS(total dissolved solids) of water shows on the display. 2. Superb technique, accurate data. Measure water purity accurately, pay close attention to families'health and safety. The lower the TDS the higher purity water has. 3. Extensively application. You can use it to test the purity of running water, plain boiled water, barreled pure water, cell water, filtered water, aquarium water, and so on. 4. lowenergy and intelligent. The tester has IPX6 waterproof body and lowenergy chip, it will auto off above 2 minutes nonuse. 5. 2 changeable button batteries are built in it. 6. Test range: 0-9990.

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Main unit: 190 mm x 20 mmHandle probe: 150 mm longProbe (only): 48 mm longCable (only): 300 mm longPower: 1 aa alkaline battery (1.5v)Weight: 160g b (without battery)include:1 pH and Cl2 probe tester1 manual1 sandpaperStandard factory packagingPackaging InformationUnit type: weight per piece: 0.221 kg (0.49 lbs) Packing: 19 cm x 12 cm x 5 cm (7.48 in x 4.72 in x 1.97 in)

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1. Series: portable PH test pen2. Working temperature: 0-60 degree C3. Measurement range: 0.00-14.00PH4. Resolution / accuracy: 0.01PH5. Battery: 2x1.5V (LR44) button batteries6. Calibration method: (4.01 / 6.86 / 9.18) three-point calibration7. Scope of application: domestic water, food PH, aquarium water quality, aquaculture and other fields8.Features: highly sensitive measuring probe, automatic temperature compensation function, three-point calibration function, automatic calibration function, easy to use, large screen display9. Product accessories:- 1xPH test pen- 1xPH 4.01 25 degree C PH Buffer Powder- 1xPH 6.86 25 degree C PH Buffer Powder- 1x user manual- 1x packaging box10. Product size / weight: 15.5x3.1x1.7cm / 49g11. Note: Some customers report that the product has data jumps, which is normal. (When using this product: After being placed in water, the data will always change slowly from the last decimal point, this is because the PH meter needs to adapt to the test environment. The data will be stable for about 1 minute when it is still, and this the final test data. In addition, if the water surface shakes, the data will also jump, so the test must ensure that the water surface is still.)

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1. Module parameters:- Power supply voltage: DC4.5-6V (micro USB interface)- Working current: no more than 70mA- Discharge voltage: 1.00V-15.00V Resolution 0.01V- End voltage range: 0.5-11.0V- Support through current: no more than 3.000A resolution 0.001A- Voltage measurement error: less than 1% + 0.02V- Current measurement error: less than 1.2% +-0.002A- Battery capacity range: 9999Ah (1Ah = 1000mAh) 2.2. When the value is large, it is switched by decimal point shift. When it is less than 10Ah, it will be displayed as X.XXX, when it reaches more than 10Ah, it will be displayed as XX.XX, and so on.3. Circuit board size: 50mmX37mm4. Finished product size: 50mmX37mmX17mm (Length X Width X Height, including copper foot height)5. Weight of board and accessories: single board 28g (including copper pillar), two 5W ceramic resistors 9g, 50W resistor about 27g (including wire)6. Note: In order to improve the voltage measurement accuracy, this circuit is specially designed with DC bias. When the terminal is connected nothing, a small voltage will be displayed, which does not affect the actual measurement. 0V) will display 0. If you want to understand the principle, you can check the superposition theorem in electrical engineering.7. How to use:- The battery under test should be fully charged first.- Connect the positive pole of the battery under test to the input positive pole, and the negative pole to the negative pole of the input. Connect the load to the output positive pole and the output negative pole, and connect the tester micro USB with working power (not available for desktop or notebook USB power supply). The battery voltage is displayed at this time.- To start the test directly, just press the “OK” button, the tester can automatically formulate a suitable termination voltage according to the full charge voltage of the battery, and will flash the display 3 times to start the test. Need to manually set the termination voltage, just press the "+" or "-" button to modify in the battery voltage display state, the termination voltage is displayed at the beginning of P, the back represents the voltage value, the resolution is 0.1V, after setting, press "OK" "start testing.- After the test starts, the tester will turn on the electronic switch that controls the load. The test process data display will be displayed between the discharge capacity (Ah), the current discharge current (A) and the battery voltage (V). When the battery voltage reaches the set termination voltage, the tester cuts off the load control switch, the display data stays above the capacity (Ah) and flashes quickly with the corresponding indicator light, the displayed capacity is the actual discharge capacity of the battery, press it "OK" can stop the flashing and let the data display stably. Press the "OK" button again to restore to the state of just powering up and replace the battery to test the next section ...8. Error code and meaning:- Err1: The battery voltage is higher than 15V- Err2: The battery voltage is lower than the set termination voltage- Err3: The battery cannot bear the load discharge current or the line internal resistance is too large- Err4: Current is too large (current exceeds 3.1A)- Err5: Improper use or wiring error has caused the device to burn down and cannot be used (current sampling or control switch MOS burned)9. Note: If the battery is reversed, when the load is turned on and the load current is large (about> 0.8A), the circuit switch tube may be damaged!10. Secondary calibration operation: Press and hold three buttons to power on the tester at the same time, enter the calibration mode, first display the number of calibration records, then enter the formal calibration sampling program to display 0u0A, then short-circuit the input positive and negative poles and press "OK "Button to complete displaying J10u, apply a standard DC voltage of 10.00V between the input positive and negative electrodes, press the" OK "button, and then display J2.0A, apply to the output negative electrode (inflow direction) and input negative electrode (outflow direction) After a constant DC current of 2.0A, press the "OK" button once to complete the calibration. The tester will pre-check the calibration data. If the calibration data is reliable, it will display 4 calibration numbers in turn and then exit. If the pre-audit believes that the data is not reliable, discard the data and exit.

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Features1. The product has reverse connection protection, it will not burn out if it is reversed 2. Lead-acid battery Lithium battery is universal and can be adjusted through the buttons on the back 3. It can display battery symbol + percentage or battery symbol + voltmeter, the two display modes can be switched at will 4. The product has only two wires, simple wiring, equipped with a wiring socket, and the wire length is 300mm 5. All battery specifications and function selections are set through the buttons on the back, no electric soldering iron is requiredSpecification1. Work voltage: 10-100V 2. Work current: Less than 5mA 3. Sleep current: 12uA (12V test) 4. Display: LCD with backlit 5. Suitable for: 3-27 x 3.7V Lithium Batteries; Lead Acid Batteries 12V, 24V, 36V, 48V, 60V, 72V, 84V 6. Dimensions: 61.3 x 33.3 x 13.5mm 7. Mounting hole Size: 58.5 x 28.5mm 8. Wire Length: 30cm

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Features1. The product has reverse connection protection, it will not burn out if it is reversed 2. Lead-acid battery Lithium battery is universal and can be adjusted through the buttons on the back 3. It can display battery symbol + percentage or battery symbol + voltmeter, the two display modes can be switched at will 4. The product has only two wires, simple wiring, equipped with a wiring socket, and the wire length is 300mm 5. All battery specifications and function selections are set through the buttons on the back, no electric soldering iron is requiredSpecification1. Work voltage: 10-100V 2. Work current: Less than 5mA 3. Sleep current: 12uA (12V test) 4. Display: LCD with backlit 5. Suitable for: 3-27 x 3.7V Lithium Batteries; Lead Acid Batteries 12V, 24V, 36V, 48V, 60V, 72V, 84V 6. Dimensions: 61.3 x 33.3 x 13.5mm 7. Mounting hole Size: 58.5 x 28.5mm 8. Wire Length: 30cm

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Product specifications1. Temperature:Temperature measurement range: -30 ° C ~ 250 ° C2. Resolution: 0.1 ° C / 0.1 ° F3. Accuracy level: ± 2 ° C4. Response time response time <1 second5. Distance ratio: (D: S) 1:16. Emissivity: 0.95NCV:1. Measurement range: 12~1000VAC2. Measurement frequency: 50Hz / 60Hz3. Safety standards: CA.III 1000V / CAI.IV 600V, CE4. Product size; 152x25x28mm5. Battery: 2xAAA 1.45V (without battery) Package Included1 non-contact AC voltage detector (without battery)1 x English manual

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