Part Number: 65-5001A

B-Guard Catalytic

A true workhorse of the gas detection world this combustible fixed monitor is focused on simplicity and reliability.

List of Benefits

  • Tamper proof construction
  • 5 Year sensor life
  • RFI/EMI Resistant powder coated protective case
  • MTBF 10 years on electronics
  • 10-30VDC operation 
  • 4-20mA source or Sink output
  • Simple user calibration procedure
  • IECex EXd IIC


Gastech has used the latest low power switch mode technology for the detection of combustible gas in LEL and ppm levels. This unique amplifier has a built in capabilities to be either a 4-20mA source or sink, simply by the positioning of 2 jumpers. It has a head voltage operation from 1.4Vdc to 14Vdc, which will cover the full range of low voltage and high voltage sensors. It is also designed for set gain control for extra low sensitivity for ppm detection. The use of a precise amplifier and precise offset voltage allows this to be one of the most stable amplifiers on the market today. Advanced calibration minimises interference between zero and span adjustment, which enables quicker and more accurate calibrations. All components are low profile surface mount designed for ease of installation and years of trouble free operation.

Available Models/ Parts

  • Amplifier part number 57-7056A
  • Sensor part number 61-0303
  • Order code: 65-5001A
  • Splash guard/cal cup: 81-0303-01
SpecificationDetail Description
Analog Output 4-20mA
Input Supply Voltage Range 10-30VDC
Head Supply Voltage 1.4-14VDC
Response Time 90% full response in less than 40 seconds
Operating Temperature -20oC to +60oC
Humidity Range 10-95%RH non condensing
Accuracy ┬▒2% of full scale
Repeatibility better than 1% of applied gas
Drift Less than 5% signal loss per year
Certification IEC Ex IIC 85degC
Weight 1200g
Dimensions 160mm x 110mm x 80mm
Enclosure IP66/IP67
Warranty 2 Years on electronics 1 year on sensor

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