Zhengzhou Winsen Electronics Technology Co., Ltd MD62 Thermal Conductor Gas Sensor （Model：MD62） User’s Manual Version: 1.6 Valid from: 2022-06-21 Zhengzhou Winsen Electronics Technology Co., Ltd Tel: 86-371-67169097 Email: sales@winsenso

Zhengzhou Winsen Electronics Technology Co., Ltd 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...

Zhengzhou Winsen Electronics Technology Co., Ltd MD62 Thermal Conductor CO2 Gas Sensor MD62 gas sensor consists of an active element and a reference element with the same resistance, both elements are placed in a wheatstone bridge circuit, The analyzing gas contents changes, the overall thermal coefficient of mixed gases changed correspondingly; when the active element meet the combustible gas, its resistance become smaller, when It meet other gas, , Its resistance become larger(air background), the bridge circuit output the voltage change, this change increase according to gas concentration,...

Zhengzhou Winsen Electronics Technology Co., Ltd Sensitivity and response characteristic Output signal dependency on working voltage Long term stability The absolute value of the drift in air is less than 2 mV per year, in 30%CO2 the absolute value of drift is less than 2mV. For a short period storage (in 2 weeks), the sensor need 8 hours preheating to stabilize, for long-term (more than one year) storage, it need more than 48 hours’ preheating. Email: [email protected]

Zhengzhou Winsen Electronics Technology Co., Ltd Cautions 1 .Following conditions must be prohibited 1.1 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. 1.2 Alkali, Alkali metals salt, halogen pollution The sensors performance will be changed badly if sensors be sprayed polluted by alkali metals salt especially brine, or be exposed to halogen such as fluorine. 1.3 Touch water Sensitivity of the sensors will be reduced when...

Zhengzhou Winsen Electronics Technology Co., Ltd 2.7 Usage Conditions 2.7.1For sensor, handmade welding is optimal way. The welding conditions as follow:  Soldering flux: Rosin soldering flux contains least chlorine  homothermal soldering iron  Temperature： 250℃  Time：less than 3 seconds 2.7.2 If users choose wave-soldering, the following conditions should be obey:  Soldering flux: Rosin soldering flux contains least chlorine  Speed: 1-2 Meter/ Minute  Warm-up temperature：100±20℃  Welding temperature：250±10℃  One time pass wave crest welding machine If disobey the above using terms,...

Zhengzhou Winsen Electronics Technology Co., Ltd the volume of the box. g. The components are installed in the test chamber in the same posture in the horizontal direction. Changing the posture will produce different thermal convection. 2. Gas concentration adjustment: The gas concentration in the box is adjusted by volume method, which can be calculated by the following formula: V(ml)=V1×C×10-6 ×(273+TR)/(273+TC) V: injected gas volume (ml); V1: box volume (ml); C: gas concentration to be adjusted (ppm) TR: Room temperature (℃); TC: Temperature in the box (℃). 3. Measurement: A. Aging: Before...