Hote-wire Gas Sensor (Model No.：MR007) Zhengzhou Winsen Electronic Technology Co.,

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MR007 Hot-wire Gas Sensor Description MR007 gas sensor consists of a test element and a compensation element. The resistance of the test element changes with the variation of electrical and thermal conductivity caused by the adsorption of flammable gas on the surface of the sensitive material, thereby measuring the gas concentration. The MR007 detection circuit adopts a Wheatstone bridge, which consists of a pair of detection elements and compensation elements as one arm of the bridge. When encountering flammable gas, the resistance of the detection element decreases, and the output voltage of...

Basic Circuit Bridge output Sensor Characteristics Description Cautions 1.Prohibited items 1.1 Exposure to Volatile Silicon Compound Vapors If the surface of the sensor is exposed to volatile silicon compound vapors, the sensitive material of the sensor will be coated by the silicon compounds, inhibiting the sensitivity of the sensor and making it irrecoverable. The sensor should be avoided in areas where silicon adhesives, hairsprays, silicone rubbers, putties, or other silicone plastic additives may exist. 1.2 Highly Corrosive Environments Exposure of the sensor to high concentrations of corrosive...

1.3 Contamination by Alkalis, Alkali Metal Salts, and Halogens Contamination of the sensor by alkali metals, especially salt spray, and exposure to halogens such as Freon can also cause performance deterioration. 1.4 Exposure to Water Splashing or immersion in water will cause a decrease in sensitive characteristics. 1.5 Freezing Freezing of water on the surface of the sensitive element will cause the sensitive material to crack and lose its sensitive characteristics. 1.6 Overvoltage Application If the voltage applied to the sensor exceeds the specified value, even if the sensor is not physically...

3.2 Welding Manual welding is the most ideal welding method for sensors. The recommended welding conditions are as follows:  Flux: Lead-free, non-cleaning flux that does not contain chlorine or silicone  Constant temperature soldering iron  Temperature: Not exceeding 350℃  Time: Not exceeding 5 seconds Violating the above usage conditions will result in a decrease in sensor perfo