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.

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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