日本根本电化学技术原理二氧化氮气体传感器NE-NO2

大气监测用二氧化氮,废气排放等.

Electrochemical Nitrogen Dioxide Gas Sensor

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　　　

蒋小姐：１３４　２８７６　２６３１　　　　　　　电话：８６　７５５－８５２５８９００ 网址：ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ　　ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ．ｃｎ　　ｗｗｗ．ｓｈｅｎｇｕｏａｎ．ｃｏｍ

大气监测用二氧化氮,废气排放等.

1. General

Nemoto NE series sensors were developed for industrial applications, and NE-NO2 is a electrochemical nitrogen dioxide gas sensor. Shape and pin positions are compatible with others, but 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 or reduction takes place, counter electrode on which reduction or oxidization takes place, and reference electrode which can monitor and keep the voltage at constant. Structure of electrochemical sensor is shown in the following figure, nitrogen dioxide gas diffuses through membrane into working electrode, and is reduced to nitrogen monoxide at working electrode. Consequently generated oxygen ion at working electrode reacts with proton, and then, water is generated at this oxidization reaction. Water molecule proceeds to counter electrode, and is reduced at counter electrode by generated current of this serial reaction. Total reaction is in the below described. NO2 gas concentration is proportional to the current

that is generated by this serial reaction.

3. Features

?Quick response

?Excellent selectivity

?Good linearity and stability

?High reliability

? Excellent durability against high temperature and humidity

4. Detected gas

Nitrogen dioxide

5. Application

?NO2 gas densitometer for industrial application

?NO2 gas alarm for industrial equipment like for car parking area

?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　　　蒋小姐：１３４　２８７６　２６３１　　　　　　　电话：８６　７５５－８５２５８９００ 网址：ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ　　ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ．ｃｎ　　ｗｗｗ．ｓｈｅｎｇｕｏａｎ．ｃｏｍ

大气监测用二氧化氮,废气排放等.

6. Dimensions and appearance

Case Material

Cap Color

Weight PPO Orchid 5 g (approx.)

Fig.1 : Appearance and dimensions of NE-NO2

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 3) Operating pressure range 0.9 – 1.1 atm

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　　　

蒋小姐：１３４　２８７６　２６３１　　　　　　　电话：８６　７５５－８５２５８９００ 网址：ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ　　ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ．ｃｎ　　ｗｗｗ．ｓｈｅｎｇｕｏａｎ．ｃｏｍ

大气监测用二氧化氮,废气排放等.

4) Detection range 0 – 20ppm 5) Maximum overload 150ppm 6) Recommended load resistor 10 ohm

8. Specifications 1) Output signal 600 +/-150nA/ppm of NO2 (Contrary signal to other models) 2) Response time (T90) Less than 25sec. 3) Repeatability in the same day Less than +/- 2% 4) Annual zero offset drift Less than 0.2ppm of NO2 5) Zero offset temperature dependence Less than 1ppm of NO2

(-20 ~ +50 degree C)

6) Minimum detection range 0.1ppm 7) Sensitivity reduction in long term Less than 2%/month 8) Lifetime warranty 24 months 9) Recommended storage time Less than 6 months

9. Electrical properties

9-1. Typical Gas Sensitivity

Fig.2 : Gas Sensitivity of NE-NO2

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　　　

蒋小姐：１３４　２８７６　２６３１　　　　　　　电话：８６　７５５－８５２５８９００ 网址：ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ　　ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ．ｃｎ　　ｗｗｗ．ｓｈｅｎｇｕｏａｎ．ｃｏｍ

大气监测用二氧化氮,废气排放等.

9-2. Cross Sensitivity

Table 1 : Cross Sensitivity of NE-NO2

Detected gases Relative sensitivity (Sensitivity to NO2 is 100.)

Nitrogen dioxide 100

Carbon monoxide 0

Carbon dioxide 0

Hydrogen 0

Chlorine 0

Sulfur-dioxide -2

Nitrogen monoxide 0

Hydrogen sulfide -120

Ammonia 0

Ethyl acetate Less than 0.5

Ethanol 0

Toluene

Less than 3

9-3. Temperature dependence

Fig. 3 : Typical temperature coefficient of NE-NO2 (100 at 20 degree C)

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　　　

蒋小姐：１３４　２８７６　２６３１　　　　　　　电话：８６　７５５－８５２５８９００ 网址：ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ　　ｗｗｗ．ｓｉｎｇｏａｎ．ｃｏｍ．ｃｎ　　ｗｗｗ．ｓｈｅｎｇｕｏａｎ．ｃｏｍ