Teledyne GMI First Responder

GMI First Responder

Product Features

  • PPM , LEL and Volume flammable gas ranges for leak detection and general safety monitoring.
  • Carbon Monoxide range for internal atmosphere monitoring
  • Probe mounted Semiconductor Sensor (Range 0 – 10,000 ppm), providing instant response leak detection with audible / visual ‘Ticker’ (Geiger) alarm indication
  • Simple four button operation allowing access to all features
  • Automatic and manual datalogging
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information
The Teledyne GMI First Responder is a combustible gas indicator designed for emergency response technicians in the gas industry. The First Responder detects flammable gas at PPM, LEL and % Vol levels with the addition of carbon monoxide for internal atmosphere monitoring. An optional external range diffusion probe with high speed semiconductor sensor enables rapid response in detecting small fitting leaks.


Leak survey
Gas escape detection
Carbon Monoxide detection
First Responder
  • 44526G First Responder PPM,LEL,VOL,CO
  • 44526GR First Responder R " " Rechargeable
  • 42200 Flexiprobe c/w Sensor
  • 42444 Semiconductor Survey Bellows Probe c/w Dust Filter Assembly
  • 42638 Semiconductor Survey Bellows Probe Handle Assembly including Semi-conductor sensor (42191C), Sensor Centre Piece (42408,
  • O-Ring (14048), Vyon Filter (42413), Sensor Cap (42409)
  • 42416 Water Filter Housing Male (42415) and Female (42637), Probe Washer (42235),Hydrophobic Filter (12358),Bellows (12738)
  • 42636 Semiconductor Survey Bellow Probe Handle (without sensor assy)
  • 42197 Filter for Semicon Probe
Sensor Assembly Parts
  • 42191C Semi-conductor sensor + PCB
  • 42408 Sensor Centre Piece
  • 14048 O-Ring
  • 42413 Vyon Filter
  • 42409 Sensor Cap
Dust Filter
  • 42405 Dust Filter Housing Female
  • 42388 Dust Filter (box / 20)
  • 42235 Probe Washer
  • 42406 Dust Filter Housing Male
  • 12738 Bellows
Water Filter
  • 12358 Hydrophobic Filter
  • 42235 Probe Washer
  • 42415 Water Filter Housing Male
Other Spares
  • 42261 Combustion Chamber Assy
  • 42174 Top Cover Assembly
  • 42082 Main PCB Asembly
  • 42211 First Responder User Handbook
  • 42284 EPROM - Serial Number Required
  • 42262 Case Assy Centre Section
  • 42255 Probe PSU Assy
  • 42227 Main Cable Assy (Main PCB to Cell Block)
  • 42180 Rechargeable Battery Pack
  • 42175 Battery Cover Assy Dry Cell
  • 13405 Carrying Case
  • 42220 Dust Cap Harness Assembly
  • 42041 Quick Op Guide
Colour Black
Your Rating