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Crowcon Gasman Personal Monitor for Oxygen, Toxic or Flammable Gases

Gasman sets the standard for flammable, oxygen and toxic personal gas monitors. Designed for use in the toughest environments Gasman offers an unbeatable combination of powerful loud and bright alarms with a stunningly compact and lightweight design.

Together with its rugged impact resistant construction and compliance to IP65 and IP67 Gasman is the ideal choice for personal monitoring in demanding industrial environments.

Find out more on our sister site Cadmus Products


  True one button operation
  Easy to read LCD display with backlight
  Clear indication of operating status
  30 day advance calibration due warning


  95dBA audible alarm
  Striking twin red/blue visual alarm
  Internal vibrating alarm
  2 levels of instantaneous alarm
  Time weighted average alarms for toxic versions


  Tough polycarbonate housing
  Full elastomeric overmoulding
  High impact resistance
  IP65 and IP67 compliant


  Fully interchangeable i-module sensors
  Flammable toxic and oxygen sensors available
  Rechargeable version for all gas types
  Dry cell versions for toxics and oxygen
  Data and event logging

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Data Sheet
User Manual

Ordering Information

Gasman Single Gas Personal Monitor

GSR-01-XX-Z Rechargeable, 0-100% LEL methane
GSR-02-XX-Z Rechargeable, 0-25% vol. oxygen†
GSR-03-XX-Z Rechargeable, 0-500ppm carbon monoxide†
GSR-04-XX-Z Rechargeable, 0-100ppm hydrogen sulphide†
GSR-05-XX-Z Rechargeable, 0-5% vol. CO2 IR SAFE AREA
Gasman FL 0-100% LEL methane
Gasman FL 0-100% LEL propane
Gasman FL 0-100% LEL pentane
Gasman FL 0-100% LEL ethylene
Gasman FL 0-100% LEL hydrogen
Gasman FL 0-100% LEL other calibrations (display shows as FL)
Gasman OX 0-25% volume oxygen
Gasman H2S 0-100ppm hydrogen sulphide
Gasman H2S 0-250ppm hydrogen sulphide
Gasman CO 0-500ppm carbon monoxide
Gasman CO H2 0-500ppm carbon monoxide (H2 filtered)
Gasman CO 0-1500ppm carbon monoxide
Gasman CL2 0-20ppm chlorine†
Gasman NH3 0-100ppm ammonia
Gasman NH3 0-1000ppm ammonia
Gasman SO2 0-20ppm sulphur dioxide
Gasman O3 0-1ppm ozone†
Gasman NO2 0-20ppm nitrogen dioxide†
Gasman H2 0-2000ppm hydrogen
Gasman HCN 0-25ppm hydrogen cyanide
Gasman PH3 0-5ppm phosphine†
Gasman HF 0-10ppm hydrogen fluoride†
Gasman F2 0-1ppm fluorine†
Gasman COCl2 0-1ppm phosgene†
Gasman CLO2 0-1ppm chlorine dioxide
Gasman NO 0-100ppm nitric oxide
Gasman ETO 0-10ppm ethylene oxide (rechargeable only)
Gasman IR CO2 0-5% carbon dioxide - uncertified only

Gasman Accessories

C03334 Torx T6 tool for star headed screw
C02132 Gasman external filter
M04851 Flow cap assembly
C01937 Aspirator assembly
C01952 Harness plate - use with the shoulder strap or chest harness straps
C01843 Shoulder strap
C01844 Chest harness strap kit - consists of two straps
C011304 Chest harness kit (harness plate and 2 straps)
C01983 Leather carry case - either wear on belt or use with shoulder strap
C01953 Hard hat clip
C01892 Gas test kit (includes trigger regulator with 1m gas supply tube, flow cap, magnet and 2m gas vent tube)
C03094 Calibration/test gas 34L cylinder, 50% LEL methane in air
C03095 Calibration/test gas 34L cylinder, 250ppm carbon monoxide in air
C03096 Calibration/test gas 34L cylinder, 15ppm hydrogen sulphide in nitrogen
C03097 Calibration/test gas 34L cylinder, 18% oxygen balance nitrogen

Gasman Battery Chargers/Interfaces

C01941 Single way charger 12Vdc input
C011318 Single way charger with multi-region power supply
C01942 Single way charger 230V UK power supply (replaced by C011318 once stock is depleted)
C01943 Single way charger 230V European power supply (replaced by C011318 once stock is depleted)
C01944 Single way charger 110V US power supply (replaced by C011318 once stock is depleted)
C011011 Single way charger 230V in-line power supply, no plug
C011009 Single way charger 110V in-line power supply, no plug
C01945 Single way charger 90-260V in-line power supply
C01296 Charging lead for vehicle lighter socket lead
C01940 Single way charger/interface 12Vdc input
C011305 Charger interface kit (includes single way charger/interface, USB-RS232 adaptor and PC lead, multi-region power supply - from 01/04/13)
C011319 Single way charger/interface with multi-region power supply
C01947 Single way charger/interface with 230V UK power supply (replaced by C011319 once stock is depleted)
C01948 Single way charger/interface with 230V European power supply (replaced by C011319 once stock is depleted)
C01949 Single way charger/interface 110V US power supply (replaced by C011319 once stock is depleted)
C011012 Single way charger/interface 230V in-line power supply, no plug
C011010 Single way charger/interface 110V in-line power supply, no plug
C01950 Single way charger/interface with 90-260V in-line power supply
C01951 5-way multiway charger without power supply
C011041 5-way multiway charger with 90-260V in-line power supply, US power supply
C011042 5-way multiway charger with 90-260V in-line power supply, UK power supply
C011043 5-way multiway charger with 90-260V in-line power supply, EU power supply

Gasman PC Interface

E07532 PC lead (9 way D, female to female)
C01832 Portables PC software CD
C02097 USB to RS232 adaptor

Gasman Charger Power Supplies

C03580 Multi-region power supply (includes UK, EU, US and Australian plug adapters)
E01535 Power supply for charger 230V for UK only (replaced with C03580 once stock is depleted)
E01536 Power supply for charger 230V for EU only (replaced with C03580 once stock is depleted)
E01537 Power supply for charger 110V for US only (replaced with C03580 once stock is depleted)
E01552 Power supply for charger 230V no plug
E01553 Power supply for charger 110V no plug
E07693 Power supply for multiway charger 90-260V

Gasman i-module Sensor Assemblies add /USA for USA alarm configurations (check for availability)

S011424/M 0-100% LEL methane
S011436/M 0-100% LEL propane
S011437/M 0-100% LEL pentane
S011439/M 0-100% LEL butane
S011440/M 0-100% LEL ethylene
S011460/M 0-100% LEL hydrogen
S011741/M 0-100% LEL other calibration, FL (unfiltered)
S011424/M/KDF 0-100% LEL methane AUS alarms
S011436/M/KDF 0-100% LEL propane AUS alarms
S011437/M/KDF 0-100% LEL pentane AUS alarms
S011423/M 0-25% oxygen, two year
S011422/M 0-500ppm carbon monoxide
S011463/M 0-1500ppm carbon monoxide
S011421/M 0-100ppm hydrogen sulphide
S011912/M 0-250ppm hydrogen sulphide
S011428/M 0-20ppm chlorine†
S011435/M 0-100ppm ammonia
S011438/M 0-1000ppm ammonia
S011425/M 0-20ppm sulphur dioxide
S011432/M 0-1ppm ozone† (includes ozone specific flow plate)
S011426/M 0-10ppm nitrogen dioxide†
S011429/M 0-2000ppm hydrogen
S011430/M 0-25ppm hydrogen cyanide
S011431/M 0-5ppm phosphine†
S011433/M 0-10ppm hydrogen fluoride†
S011434/M 0-1ppm fluorine†
S011995/M 0-1ppm chlorine dioxide
S011852/M 0-100ppm nitric oxide
S011464/M 0-1ppm phosgene
S011994/M 0-10ppm ethylene oxide
S012297/M 0-500ppm carbon monoxide (H2 filtered)
S012171/M 0-5% CO2 IR (uncertified safe area only)

Gasman Spares

S011818/1 Rear moulding assembly
M04855 Front moulding
M02362 SS alligator clip
M04973 Gasman front and rear moulding set - CO2 IR specificGasman front and rear moulding set - CO2 IR specificGasman front and rear moulding set - CO2 IR specificGasman front and rear moulding set - CO2 IR specific
M04852 Flow cap gasket
C03329 Metal clip
M03705 Clip retaining nut M3 (minimum order quantity 10)
S011760/2 Main PCB non-rechargeable
S011761/2 Main PCB rechargeable
E01918 Disposable battery (minimum order quantity 5)
C011303 Gasman battery tray assembly (inc. battery and tray)
E07621 i-module elastomer (minimum order quantity 5)
M04839 i-module elastomer support (minimum order quantity 5)
E01873 Gasman LCD
E07620 LCD elastomer (minimum order quantity 5)
E07649 Charger elastomer - rechargeable version only (minimum order quantity 5)
M04682 Sensor sealing ring (minimum order quantity 5)
SM1035 Sounder
M04858 Sounder seal (minimum order quantity 10)
M03793 Case screw (minimum order quantity 20)
M05910 Crowcon domed label (minimum order quantity 8)
M07630 Gasman English manual
M07631 Gasman American manual
M07632 Gasman French manual
M07633 Gasman German manual
M07634 Gasman Dutch manual
M07635 Gasman Spanish manual
M07636 Gasman Italian manual
M07637 Gasman Brazilian Portuguese manual
C01873 Gas test kit magnet
M05913 Gas type label LEL (minimum order quantity 20)
M05914 Gas type label LIE (minimum order quantity 20)
M05915 Gas type label UEG (minimum order quantity 20)
M05916 Gas type label OX (minimum order quantity 20)
M05917 Gas type label H2S (minimum order quantity 20)
M05918 Gas type label CO (minimum order quantity 20)
M05919 Gas type label SO2 (minimum order quantity 20)
M05920 Gas type label CL2 (minimum order quantity 20)
M05921 Gas type label NH3 (minimum order quantity 20)
M05922 Gas type label O3 (minimum order quantity 20)
M05923 Gas type label NO2 (minimum order quantity 20)
M05924 Gas type label HCN (minimum order quantity 20)
M05925 Gas type label F2 (minimum order quantity 20)
M05926 Gas type label HF (minimum order quantity 20)
M05927 Gas type label PH3 (minimum order quantity 20)
M05928 Gas type label NO (minimum order quantity 20)
M05931 Gas type label TOX (minimum order quantity 20)
M05999 Gas type label CO2 (minimum order quantity 20)

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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