Manual （Model No.:GMV-2021B） Version: 1.0 Valid from: 2021.08.28 Zhengzhou Winsen Electronic Technology Co., Lt

Statement This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways. Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the instructions. If users disobey the terms or remove, disassemble, change the components inside of the sensor, we shall not...

MEMS Sensor SSSSSSSseriessERIES GMV-2021B H2 Sensor Product Description GMV-2021B hydrogen sensor is a gas sensor based on all solid state MOS principle of advanced MEMS architecture. Hydrogen in the environment will lead to the change of MOS conductivity, which is an exponential function of hydrogen concentration. Character: All solid state, lightweight, low power consumption, long life, excellent anti-interference capability Main Application: Hydrogen energy automobile hydrogen energy Preparation of hydrogen energy storage Hydrogen energy transportation and use Hydrogen detection in other scenarios...

MEMS Sensor SSSSSSSseriessERIES Basic Circuit: Standard Testing Condition 20℃±2 ℃； Temperature& Humidity Standard Test Circuit Note: the figure above shows the basic test circuit of GMV-2021B sensor. The sensor needs to apply two voltages: heater voltage (VH) and test voltage (VC). VH is used to provide specific working temperature for the sensor, and DC power supply or AC power supply can be used. Vout is the voltage across the load resistor (RL) in series with the sensor. VC is the voltage to provide test for load resistance RL, and DC power supply must be used. Pic. 2 GMV-2021B Testing Circuit...

MEMS Sensor SSSSSSSseriessERIES Sensor Characteristics: Rs means resistance in target gas with different concentration, R0 means resistance of sensor in clean air. All tests are finished under standard test conditions. The output in above Fig is the voltage of RL which is in series with sensor. All tests are finished under standard test conditions and the test gas is 200ppm H2 gas. Rs means resistance of sensor in 200ppm H2 gas under different temp. and humidity. Rso means resistance of the sensor in 200ppm H2 gas under 20℃/65%RH. The output in above Fig is the voltage of RL which is in series...

MEMS Sensor SSSSSSSseriessERIES Instructions: 1. Preheating time Sensor’s resistance may drift reversibly after long-term storage without power. It need to preheat the sensor to reach inside chemical equilibrium. Preheating voltage is same with heating voltage VH. The suggested preheating time as follow: Storage Time Suggested aging time Less than one month No less than 24 hours No less than 48 hours More than six months No less than 72 hours 2. Calibration Sensor’s accuracy is effected by many factors such as reference resistance’s difference, the sensitivity difference, temperature, humidity,...

MEMS Sensor SSSSSSSseriessERIES No matter the sensors electrified or not, if exposed to adverse environment for long time, such as high humidity, high temperature, or high pollution etc., it will influence the sensors’ performance badly. 2.4 Vibration Continual vibration will result in sensors down-lead response then break. In transportation or assembling line, pneumatic screwdriver/ultrasonic welding machine can lead this vibration. 2.5 Concussion If sensors meet strong concussion, it may lead its lead wire disconnected. 2.6 Soldering 2.6.1 Recommended conditions for reflow soldering Neutral...

MEMS Sensor SSSSSSSseriessERIES 环保条款 RoHS：本产品符合现行 RoHS 指令，产品不含环 境限制的十种化学物质。