上海一氧化碳气体检测探头NE-CO-P

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上海一氧化碳气体检测探头NE-CO-P

中国气体检测仪十大品牌深国安厂家直销

Electrochemical CO Gas Sensor

(Flat Type)

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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中国气体检测仪十大品牌深国安厂家直销

1. General

Nemoto NE series sensors were developed for industrial applications, and NE-CO-P is a flat/plane type electrochemical CO gas sensor. Shape, pin positions and basic features are quite different from the others, but the stability, repeatability, durability and reliability are superior to others like NE-CO, however 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

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membrane into working electrode, and CO is

oxidized to CO2 at working electrode.

Generated proton at this reaction proceeds to counter electrode, and reacts with dissolved 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. 3. Features

?Quick response and large sensitivity

?Excellent selectivity

?Good linearity and stability

?High reliability

?Excellent durability against high temperature and humidity

?Down sizing

4. Detected gas

Carbon monoxide

5. Application

?CO gas densitometer for industrial application

?CO gas alarm for industrial equipment

? Handheld type CO gas leakage checker

6. 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

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　　　

中国气体检测仪十大品牌深国安厂家直销

3) Operating pressure range 0.9 – 1.1 atm 4) Detection range Normal : Less than 1,000ppm Maximum : 2,000ppm 5) Recommended load resistor 10 ohm 7. Specifications 1) Output signal 40 +/- 10nA/ppm.CO at 20 degree C 2) Response time (T90) Less than 30sec. 3) Repeatability in the same day Less than +/- 2% 4) Annual zero offset drift Less than 5ppm of CO 5) Zero offset temperature dependence Less than 10ppm of CO (-20 ~ +50 degree C) 6) Sensitivity reduction in long term Less than 5%/year 7) Lifetime warranty 24 months 8) Recommended storage time Less than 6 months

8. Dimensions and appearance

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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中国气体检测仪十大品牌深国安厂家直销

Case Material

Cap Color

Weight PPO Light grayish Green (Pre-filter : wine-red) Approx. 2.4g

Fig.1 : Appearance and dimensions of NE-CO-P

9. Electrical properties

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9-2. Cross Sensitivity

Table 1 : Cross Sensitivity of NE-CO-P Detected gases Relative sensitivity (Sensitivity to CO is 100.) Carbon-monoxide 100

Hydrogen 40

Methane 0

Iso-butane 0

Carbon-dioxide 0

Sulfur-dioxide 0

Hydrogen Sulfide 0

Nitric Oxide Less than 30

Nitrogen Dioxide 0

Ammonia 0

Ethyl Acetate 0

Heptane 0

Chlorine 0

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　　　

中国气体检测仪十大品牌深国安厂家直销

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9-3. Temperature dependence

Fig.3 : Temperature dependence

10. Recommended circuit diagram

Recommended circuit diagram for evaluation of NE-CO-P is shown in figure 4. In this circuit diagram, OP97 as operational amplifier is employed, however the other low price one is to be applicable for actual use. And, thermistor is employed, resistance value of 10Kohm at 25 degree C and around 3500 as B constant is recommended. Ishizuka thermistor is not pointed, and another one is also available. Basically, temperature compensation in the circuit diagram is the same as of NE-CO.

Fig. 4 : Measuring circuit diagram for evaluation

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　　　