Carbon Monoxide Gas Sensor （Model：MP-7） Manual Version: 1.4 Valid from: 2021-07-17 Zhengzhou Winsen Electronics Technology Co.,

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...

Zhengzhou Winsen Electronics Technology Co., Ltd MP-7 Carbon Monoxide GAS SENSOR MP-7 adopts advanced planar construction production technics, using MOS material formed by micro AL2O3 ceramic tube and heater, electro-down-lead be fetched out, and are fixed into a metal base and cover. Adopting low and high temperature circling detection: when low temperature （VH=1.5V）, it detects CO, Conductance of sensor bigger along with CO concentration in air; When high temperature（VH=5.0V）, clean other gases, using simple circuit could change the conductance, change it to be output signal which relatively...

Zhengzhou Winsen Electronics Technology Co., Ltd Basic circuit This circuit shows the basic measuring circuit of MP-7 sensor. Two voltage should be applied to this sensor, heating voltage (VH) and testing voltage(Vc). VH is used for supplying a certain temperature, both of DC or AC are suitable. While detecting CO gas, the VH need to be at 1.5V±0.1V low voltage condition; while non detecting (recovering) status, it must be at 5V±0.1V. VRL is voltage on the series load resistance(RL). Vc is the testing voltage to RL, It must be DC Fig3. Typical Sensitivity Curve The ordinate is resistance ratio...

Zhengzhou Winsen Electronics Technology Co., Ltd Cautions 1 .Following conditions must be prohibited 1.1 Exposed to volatilizable organic silicon steam Sensing material will lose sensitivity and never recover if the sensor absorbs organic silicon steam. Sensors must avoid exposing to silicon bond, fixature, silicon latex, putty or plastic contain silicon environment. 1.2 High Corrosive gas If the sensors are exposed to high concentration corrosive gas (such as H2S, SOX, Cl2, HCl etc.), it will not only result in corrosion of sensors structure, also it cause sincere sensitivity attenuation. 1.3...

Zhengzhou Winsen Electronics Technology Co., Ltd www.winsensor.com humidity, high temperature, or high pollution etc., it will influence the sensors’ performance badly. 2.5 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. 2.6 Concussion If sensors meet strong concussion, it may lead its lead wire disconnected. 2.7 Usage Conditions 2.7.1For sensor, handmade welding is optimal way. The welding conditions as follow:     Soldering flux: Rosin soldering...