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GMI First Responder
  • GMI First Responder
  • GMI First Responder
  • GMI First Responder

GMI First Responder

GMI Approved distributor

lead time Lead Time Approx. 14-28 Days.

Includes: Carrying Case, Carrying Harness, 4mm Hex Driver, User Handbook, Quick Operation Guide, 1.5m Clear Sample Line, Probe Handle c/w Filters, Small Plastic Probe (Solid End), Cotton Particulate Filters (Box of 10) x 2, Dust Cap - Flexi Probe Connection.

First Responder

The GMI First Responder is a combustible gas indicator designed for emergency response technicians in the gas industry. This instrument combines quality, ruggedness and advanced GMI Technology in a user friendly, portable gas detector.

The instrument is a highly flexible, four button portable gas detector which is designed to provide measurement of Lower Explosive Level (LEL) and Volume flammable gas for leak detection and general safety monitoring.

The First Responder also features a Parts Per Million (PPM) flammable range to increase sensitivity to smaller leaks and a Carbon Monoxide (CO) range for internal atmosphere monitoring where odour call response is required.

The First Responder is equipped with both audible and visual alarms and Geiger indications on the EXT and PPM flammable ranges.


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.
Audible / visual ‘Ticker’ (Geiger) alarm indication.
Simple four button operation allowing access to all features.
Automatic and manual datalogging.
Integral pump.
Comprehensive range of probes and accessories available.
Rugged polypropylene case, sealed to IP54 rating.
Rechargeable or alkaline battery options.
Fully certified to international standards.

GMI First Responder Specifications
Measuring Ranges 0 to 10,000 ppm Flammable EXT Range
(External Semiconductor Sensor)
0 to 1000 ppm Flammable
0 to 100% LEL
0 to 100% Volume Gas
0 to 1000 ppm Carbon Monoxide (CO)
Note: Hydrogen Sulphide and Oxygen are available on request.
Resolution PPM 0 to 1000 ppm - 5 ppm.
Resolution LEL 0 to 10% - 0.1%
10% to 100% - 1%.
Resolution Vol Gas 0 to 100% - 1%.
Resolution CO 0 to 1000 ppm - 1 ppm.
Resolution EXT 0 to 1000 ppm - 1 ppm
1000 to 9999 ppm - 10 ppm.
Sampling Integral pump; sample path is protected by a hydrophobic filter.
Sensor Life Flammable (LEL/VOL) 5 Years
CO 2 Years.
Display LCD with automatic backlighting.
Temperature -20ºC to +50ºC (-4ºF to +122ºF).
Humidity 0-95% R.H. non-condensing.
Battery 4 ‘D’ size Alkaline Cells or Rechargeable Battery Pack.
Battery Life 18 hours Alkaline (12 hours with External Semiconductor Sensor probe connected) or 8 hours Rechargeable at 20ºC (68ºF).
Datalogging Both automatic and manual.
Rating IP54 (Dust protected and splashproof).
Alarms Highly visible flashing LED.
Sounder: In excess of 80dB(A), typically 85db(A) @ 1m.
Ticker (Geiger) in ppm Flammable and EXT ranges.
Certification ATEX II 2 G EEx ia d IIB T3 (Ta = -20ºC to +50ºC)
IECEx Ex d ia IIB T3 (Ta = -20ºC to +50ºC)
UL 913 Class I, Div 1 Groups C and D
CSA Class I Groups CD C22.2 No. 152.
Construction Moulded polypropylene case.
Dimensions 180 x 95 x 105 mm (7.1 x 3.7 x 4.1 in).
Weight 1.7kg / 3.75lbs.
First Responder warranty Two-years.


GMI First Responder Datasheet

PDF Specifications of the GMI First Responder combination instrument for first call and emergency response technicians.

Download (1.71M)

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GMI First Responder
Charger Standard Charger c/w Universal Power Supply. 13184
Charger & s/w Smart Charger & Datalogging Softwarec/w 240V Power Supply (UK Plug). 13100
Strap Confined Space Clip / Wrist Strap. 65213
Battery Rechargeable battery pack. 13000
Flexical Plus Flexical Plus. 99556
Probe Plastic Probe - 80cm Solid End. 12393
Flexi Probe Semiconductor Sensor (Flexi) Probe c/w Filter Disc. 42200
Filter Disc Filter Disc (use with 42200). 42197
Probe c/w Dust filter Semiconductor Survey (Bellows) Probe c/w Dust Filter. 42444
Handle Plastic Handle. 13561
Bellows Probe Bellows Probe (use with 13561). 13563

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