NDIR Methane (CH4) Gas Sensor - IRceL CH4

• Operating Principle: Non-Dispersive Infra-Red
• Measurement Range: 0-5% vol. Methane
• Accuracy (-20°C to +50°C): Within ± (0.1% vol CH 4 + 4% of concentration)​
• Response Time (T90): < 35 Seconds
• Supply Voltage: 3-5 VDC, 3.3 V to utilise EEPROM calibration
• MTBF: > 5 years

  • Model Number: IRceL CH4
  • Data Sheet: Date Sheet File
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  • NDIR Methane (CH4) Gas Sensor
  • NDIR Methane (CH4) Gas Sensor
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Product Specification

IRceL CH4 NDIR CH4 Sensor Description
Miniature infrared sensor with on-board EEPROM and thermistor

IRceL CH4 NDIR CH4 Sensor Key Features & Benefits:
• Integrated thermistor for accurate temperature compensation
• EEPROM programmed with sensor specfic performance characteristics
• Compact Size

IRceL CH4 NDIR CH4 Sensor Technical Specifications

Operating Principle
Non-Dispersive Infra-Red (NDIR)
Measurement Range
0-5% vol. Methane
Accuracy (-20°C to +50°C)
Within ± (0.1% vol CH 4 + 4% of concentration)
Response Time (T90)
< 35 Seconds
    5% CH

< ±0.015% CH 4
< ±0.05% CH 
See Operating Principles OP17

Supply Voltage
3-5 VDC, 3.3 V to utilise EEPROM calibration
Power Consumption
<100 mW at 3.3 V
Recommended Lamp Frequency
2 Hz, 50% duty cycle
Minimum Resolution

0.03% CH 4 at zero
0.1% CH 4 at range
Warm-up Time
< 10 Seconds

Housing Material
Stainless Steel (see back page)
23 g

Typical Applications
General Purpose Portable Fixed Methane Detection
Operating Temperature Range
-20°C to +50°C
Operating Humidity Range
0 to 99% RH (non-condensing)
Operating Pressure Range
700 to 1300 mBar with compensation

Long Term Zero Drift
< ±0.05% CH 4 per month
Recommended Storage Temp
-20°C to +50°C
> 5 years
Standard Warranty
12 months from date of despatch

Connection should be made via PCB sockets only. Soldering to the pins will seriously damage your sensor.

All performance data is based on conditions at 20°C, 50%RH and 1013mBar, using City Technology recommended circuitry. For sensor performance data under other conditions, refer to the Characterisation Note and Operating Principles.

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