上海南京剧毒气体硫化氢气体检测传感器NE-H2S

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上海南京剧毒气体硫化氢气体检测传感器NE-H2S

深国安电子另有不同量程和信号输出的气体检测模块、气体探测器、气体检测模组和气体检测仪有售。免费技术咨询,免费出解决方案。深国安电子-气体检测一站式方案解决者

Electrochemical Hydrogen Sulfide Gas Sensor

(NE-H2S, NE-H2S-100, NE-H2S-200, NE-H2S-500)

For Industrial Application

深圳市深国安电子科技有限公司地址：广东省深圳市龙华新区牛栏前大厦Ｃ５０７　　　

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1. General

Nemoto NE series sensors were developed for industrial applications, and NE-H2S, NE-H2S-100, NE-H2S-200 and NE-H2S-500 are available for detection of hydrogen sulfide. Shape and pin positions are compatible with others, especially NE-H2S-100 is quite compatible concerning also basic features. Additionally, the stability, repeatability, durability and reliability are superior to others, however the price is competitive with others. Features and applications are as follows.

2. Detection principle

Electrochemical sensor consists of working electrode on which oxidization takes place, counter electrode on which reduction takes place, and reference electrode which can monitor and keep the voltage at constant. Structure of electrochemical sensor NE-H2S is shown in the following figure, hydrogen sulfide gas diffuses through membrane into working electrode, and is oxidized at working electrode. Consequently generated proton at this reaction proceeds to counter electrode, and reacts with dissolved oxygen in electrolyte to water. Total reaction is in the below described. Hydrogen sulfide gas concentrations is proportional to the current that is generated by this serial reaction.

3. Features

?Quick response

?Excellent selectivity and repeatability

?Good linearity and stability

?High reliability and long lifetime

? Excellent durability against high temperature and humidity

4. Detected gas

Hydrogen sulfide

5. Application

?H2S gas densitometer for industrial application

?H2S gas alarm for industrial equipment

?Handheld type H2S gas leakage checker

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Environmental monitoring equipment

深圳市深国安电子科技有限公司地址：广东省深圳市龙华新区牛栏前大厦Ｃ５０７　　　

6. Dimensions and appearance

Case Material

Cap Color

Weight PPO Yellow 5 g (approx.)

深圳市深国安电子科技有限公司 7. Ratings 1) Ambient temperature and Temperature : -20 - +50 degree C humidity in operation Humidity : 15 – 90%RH 2) Recommended ambient temperature Temperature : 0 – 20 degree C and humidity in storage Humidity : 15 – 90%RH – 1.1 atm

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3) Operating pressure range 0.9 Fig.1 Appearance and dimensions of NE-H2S (Other H2S series are the same as the above.) 地址：广东省深圳市龙华新区牛栏前大厦Ｃ５０７　　　

4) Detection range 5) Recommended load resistor 10 ohm

8. Specifications 1) Output signal (at 20 degree C) NE-H2S 500 +/- 100nA/ppm.H2S NE-H2S-100(Standard type) 700 +/- 150nA/ppm.H2S NE-H2S-200 500 +/- 100nA/ppm.H2S NE-H2S-500 200 +/- 50nA/ppm.H2S 2) Response time (T90) Less than 30sec. 3) Repeatability in the same day Less than +/- 2% 4) Annual zero offset drift NE-H2S, 100 and 200 Less than 1ppm of hydrogen sulfide NE-H2S-500 Less than 2ppm of hydrogen sulfide 5) Zero offset temperature dependence NE-H2S, 100 and 200 Less than 1ppm of hydrogen sulfide NE-H2S-500 Less than 3ppm of hydrogen sulfide

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6) Sensitivity reduction in long term Less than 10%/year 7) Lifetime warranty 24 months 8) Recommended storage time Less than 6 months

9. Electrical properties

9-1. Typical Gas Sensitivity

Fig.2 : Gas Sensitivity of NE-H2S series 深圳市深国安电子科技有限公司

地址：广东省深圳市龙华新区牛栏前大厦Ｃ５０７　　　

9-2. Cross Sensitivity

Table 1 : Cross Sensitivity of NE-H2S series

Detected gases

Hydrogen sulfide Carbon monoxide Carbon dioxide Hydrogen Chlorine

Sulfur-dioxide Nitric oxide Methane Ammonia

Nitrogen dioxide Ethylene *Exposure time : 30min.