Hot-wire Type Gas Sensor （Model：MR513） 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 MR513 Hot-wire Gas Sensor Overview MR513 type gas sensor detect the gas concentration through resistance variation of platinum loop, which is based on the principle of the gas absorbed on the surface of metal oxide semiconductor, lead to the heat exchange and electricity exchange variation. It consists of detecting element and compensating element, which are the two legs of electric bridge. When exposing to the combustible gas, the resistance of detecting element reduces and the voltage variation of bridge output increase in direct proportion according...

Zhengzhou Winsen Electronics Technology Co., Ltd The features of sensitivity, response and resume The output signal varies with humidity and temperature Long-term stability The drift in the air is less than 10mV per year, and the drift in the 0.01% ethanol is less than 10mV. It would cost 30 minutes aging for the stability of sensor according to short term storage (2 weeks), and cost 5 hours aging for the stability of sensor according to long-term storage (1 year). Email: [email protected]

Zhengzhou Winsen Electronics Technology Co., Ltd Note 1 Following conditions must be avoided. 1.1 Exposed to organic silicon steam. If organic silicon steam is adsorbed on the surface of sensor, sensitive material of sensor will be coated, which will restrain sensitivity of sensor and beyond retrieve. The sensor should avoid exposing to where existing of silicon adhesive, fixature, silicon latex, putty or other plastic additive contains silicon. 1.2 High corrosive gas environment If the sensors exposed to high concentration corrosive gas (such as H2S，SOX，Cl2，HCl etc),it will not only result in...

Zhengzhou Winsen Electronics Technology Co., Ltd If sensors meet strong concussion, it may lead its lead wire disconnected. 2.7 Usage For sensors, handmade wielding is optional way. If use wave crest wielding should meet the following conditions: 2.7.1 Soldering flux: rosin soldering flux contains least chlorine. 2.7.2 Speed: 1-2 Meter/Minute 2.7.3 Warm-up temperature: 100±20°C 2.7.4 Welding temperature: 250±10°C 2.7.5 A single pass wave crest welding machine If disobey the above using terms, the sensitivity of sensor will be reduced. Attachment: testing for sensors Tester: A, Gas chamber: material...

Zhengzhou Winsen Electronics Technology Co., Ltd A, Aging: Before testing, use voltage rating to electrify more than 5 hours, if sensors are stored for long time, it should be aging more than 24 hours. B, Testing: After presaging, measure its output voltage Va in air. It will cost 1 min for injecting the testing gas into the chamber, which is diffused to the whole chamber. Measure the voltage of sensor Vg in the testing air. Gas sensitivity could shown as : S=(Vg-Va)/C. C is gas concentration. Note: To keep continual product development, we reserve right to change design features without prior...