日本NEMOTO抗干扰型一氧化碳传感器NE7-CO-H(英文)

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日本NEMOTO抗干扰型一氧化碳传感器NE7-CO-H(英文)

Electrochemical CO 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

1. General

Nemoto NE7 series sensors were newly developed for mainly fixed industrial applications, and there are 2 types in NE7-CO series, NE7-CO-H and NE7-CO-H10000. Both types have a function of hydrogen sensitivity compensation. Shape, dimension, pin positions and basic features are compatible with other 7 series, however the stability, repeatability, durability and reliability are highly superior to competitive sensors, but the price is competitive with the 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 is shown

in right figure, CO gas diffuses through membrane

into working electrode, and CO is oxidized to CO2

on working electrode. Generated proton at this reaction

proceeds to counter electrode, and reacts with dissolved Total reaction : CO+1/2O2→CO2 oxygen in electrolyte to water. Total reaction is in the

above. CO gas concentration is proportional to the current that is generated by serial reaction. This NE7 series has an additional working electrode under the main working electrode for hydrogen sensitivity compensation as shown in the above figure, it is different from the ordinal one.

3. Features

?Quick response and large sensitivity

?Complete selectivity

?Good linearity and stability

?High reliability and long lifetime

?Excellent durability in strict circumstance

4. Detected gas

Carbon monoxide

5. Applications

?CO gas densitometer for industrial application

?CO gas analyzer for gas water heater

? Fixed type CO gas analyzer

6. Ratings 1) Ambient temperature and Temperature : -20 - +50 degree C humidity in operation Humidity : 15 – 90%RH

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　　　

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

4) Detection range 0 - 1,000ppm (NE7-CO-H)

0 – 10,000ppm (NE7-CO-H10000) 5) Maximum overload 2,000ppm (NE7-CO-H) 20,000ppm (NE7-CO-H10000) 6) Recommended load resistor 10 ohm 7. Performance characteristics 1) Output signal 100 +/- 20nA/ppm.CO at 20 degree C (NE7-CO-H) 15 +/- 4nA/ppm.CO at 20 degree C (NE7-CO-H10000) 2) Zero offset at 20 degree C Less than 5ppm of CO (NE7-CO-H) Less than 50ppm of CO (NE7-CO-H10000) 3) Response time (T90) Less than 35sec. (NE7-CO-H) Less than 40sec. (NE7-CO-H10000) 4) Repeatability in the same day Less than 1% of signal (NE7-CO-H) Less than 2% of signal (NE7-CO-H10000) 5) Resolution 0.5ppm of CO (NE7-CO-H)

4ppm of CO (NE7-CO-H10000) 6) Zero offset temperature dependence -3 - +15ppm of CO (NE7-CO-H) (-20 ~ +50 degree C) -10 - +50ppm of CO (NE7-CO-H10000) 7) Sensitivity reduction in long term Less than 5% signal loss/year 8) Pressure coefficient 0.02% signal/mBar 9) Expected lifetime 5 years in air 10) Recommended storage time Less than 6 months

11) Bias voltage Unnecessary

12) Position sensitivity None

13) Auxiliary electrode To compensate for H2 cross-interference 14) Inboard filter To remove hydrogen sulfide

15) Output linearity Linear

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

8. Dimensions and appearance

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深圳市深国安电子科技有限公司

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