DE-OX FIRE methane analyzer

DE-OX® FIRE is a digital measurement instrument based on an innovative non-dispersive infra red (NDIR) Methane sensor. The sensor detects Methane content in ambient, in any tank or gas leaking.FIREdata sheet


  • Methane analysis into air.
  • 0,1 % resolution.
  • Available in direct % or in LEL (Lower Explosive Limit) % reading.
  • Sensor and analyzer autosetting.
  • NDIR compact sensor.
  • Two custom audible and visible alarms.
  • 4-20 mA analog output for external devices.
  • Open Collector output for external relays.
  • Numeric display of 50x35mm.
  • Battery low indicator.
  • Standard 9 Volt transistor battery.
  • Simple battery and sensor replacement.
  • Direct connection to every kind of tank valve with TEMC® rubber cup or other available accessories.
  • It is possible to remove and remote the sensor from the instrument case.
  • Available with remote sensor in ATEX – IECEx stainless steel certified explosion proof sensor case (option).
  • Large range of detection gas concentration up to 100% Volume.
  • Soft protection and transport bag.
  • Dimensions: max 8,5×7,5 cm weight 250 grams.


Methane Sensor Specifications

High performance, general purpose CH4 sensor that provides a temperature compensated and linear CH4 measurement over sensing range. The instrument uses proven non-dispersive infra red (NDIR) sensor technology to detect and monitor the presence of methane gas. The sensor contains a long life tungsten filament infrared light source, an optical cavity into which gas diffuses, a dual temperature compensated pyroelectric infrared detector, an integral semiconductor temperature sensor and electronics to process the signals from the pyroelectric detector.

  • The sensor outputs actual CH4 readings, compensated for temperature in the range -20C and +50C.sensor_CO2a
  • Typical resolution 0.01% volume for the range 0-10% volume methane and 0.1% volume for the range 10-100% volume.
  • Temperature & Humidity working range
    • -20 °C to 50 °C (-4°F to 122°F)
    • Temperature performance over the range:
  • – ± 0.1% volume methane or ± 10% of the reading for the range 0 to 2.5% volume, whichever is greater, and ± 15% of the reading for the range 2.5% volume to 10% volume.
  • – ± 10% of the reading for the range 10 to 100% volume
    • Storage temperature range: -20°C to +50°C (-4°F to 122°F)
    • 0 to 95% RH, non-condensing
  • Warm-up Time To final zero ± 2% full-scale: 1 minute
  • Accuracy at ambient pressure (tipical 1013 mbar)
    • Sensor linearity at ambient temperature is ± 10% of the reading.
    • Response Time T90: <30s @ 20°C (68°F) ambient
    • gas flow rates kept below 600 cc/minute with no change in temperature.
    • Zero Repeatability: ± 0.05% of full scale @ 20°C (68°F) ambient
    • Span Repeatability ± 0.1% volume methane at 5% applied gas, ± 2% volume methane at 100% applied gas.
    • Long term zero drift: ± 0.05% volume methane per month.
  • Recommended a maximum interval of 6 months between calibration checks.
  • Explosion proof sensor case (option):atex head
    • Housing material: stainless steel grade 303, (grade 316 available at additional cost)
    • ATEX Certified II 2 G Ex d IIC T4 Gb
    • IECEx Certified Ex d IIC T4 Gb
    • Ta = -20ºC to +60ºC
    • Installation outside the instrument case, connected with a wire.
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