Semiconductor Flat Surfaced Gas Sensor （Model：MP-9） Manual Version: 1.1 Valid from: 2016-07-10 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-9 CO/CH4 Semiconductor Flat Surfaced Gas Sensor Profile MP-9 model with advanced planar construction is comprised of heater and metal oxide semiconductor material of subminiature Al2O3 ceramic plate, fetch out electrode down-lead, encapsulation in metal base and cap. It detects carbon monoxide (1.5V) by method of cycle high and low temperature. At high temperature (5.0V), it can detect CO as well as clean the other gases adsorbed at low temperature. The sensor’s conductivity gets higher along with the CO and CH4 gas concentration rising. Users...

Zhengzhou Winsen Electronics Technology Co., Ltd Basic circuit Fig2. Test circuit This circuit shows the basic measuring circuit of sensor. Two voltage should be applied to this sensor, heating voltage (VH) and test voltage (Vc). VH is used for supplying a certain temperature which can be DC or AC. For this product, VH should be 1.5V±0.1V when detecting CO and it should be 5V±0.1V when non detection status(recovery status) or detection CH4. VRL the voltage on the load resistance (RL) which connects to the sensor in series. Vc is supply the test voltage for RL and it must be DC. The ordinate is...

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.winsen-sensor.com 2.3 Long time storage The sensors resistance will drift reversibly if it’s stored for long time without electrify, this drift is related with storage conditions. Sensors should be stored in airproof bag without volatile silicon compound. For the sensors with long time storage but no electrify, they need long galvanical aging time for stability before using. The suggested aging time as follow: Stable2. Storage Time Suggested aging time Less than one month Not less than 48 hours Not less than 72 hours More than six months Not...