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Combustible Gas Sensor (Pellistor and Compensator), 100% LEL

Combustible Gas Sensor (Pellistor and Compensator), 100% LEL

Features:
long life time
low power consumtion
US Patent Nr. 4.314.475
Technical Data

Sensor type

methan-CH4-TC-5%

Measuring principle

thermocatalytic; Pt + Pd on AI2O3

Measuring range

0-100%LEL(0-5% vol. CH4)

Resolution

0.01 %CH4

Output Sensitivity

25 mV/% CH4, 5 mv

Zero signal offset

30mV

Operating Current

50 mA 3mA

Diffused power:

120 mW

Supply voltage (mV)

2.7 V0.10 V

Linearity

< 5 % FS

Response time 1 90 (s) at 20C

< 15s

Warm up/cooling time constant:

0.08s

Warm up/cooling total time:

0.2s

Long term zero drift:

< 5% FS/month

Long term sensitivity drift:

< 5% FS/month

Operation temperature range:

- 20Cto+50C

Operation humidity range:

0-95% (non-condensed)

Storage temperature:

-40C to +50C

Effect of humidity:

no

Sensor life expectancy:

> 36 months

Warranty:

24 months

Mechanical dimensions:

diameter 15.5 mm, height 11.8 mm

Dimension of catalytic cell:

appr. 0.25 mm

Mass:

6 g

Cross sensitivities:

usual for thermocatalytic sensors

Poison resistance:

usual for thermocatalytic sensors

 

 

 

Thermocatalytic CH4-sensor Model DTK-1


Outline dimensions of LEL-Sensor in mm (5:1)


                                  


CH4+2O2 --> CO2 + 2H2O + reaction heat

1. Sinter metal filter diameter 12 x 0.5 mm; Stainless steel powder
2. Nickel cap
3. Hold block
4. Catalyzer spiral (Pellistor)
5. Cover (polyamide)
6. Epoxid resin
7. Housing (polyamide)
8. Ring (polyamide)

 

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