Covid 19 News: Open as Normal
All Crowcon Products

Crowcon Gasman Single Gas Personal Gas Detector - Non-Rechargeable

Reward Points (?)

Logged in, worth £4.74, read more.

As low as £237.60 £198.00
Free UK Delivery* Delivery Options

UK - Zone 1 Orders

England, Wales & most of Scotland.

Free 3-7 Working Day1
Orders Over £99 & Selected Items

Standard 2-7 Working Day1
From £1.95

Tracked 2-3 Working Day

Express Next Working Day

Priority Next Working Day
£14.95 (Pre-Noon)
£19.95 (Pre-10:30am)

Saturday & Sunday
£14.95 (Pre-Noon)

UK - Zone 2 Orders

Highlands, Islands & Northern Ireland.

Free 3-7 Working Day1
Selected Items (Calculated at Checkout)

Standard 2-7 Working Day2
From £1.95

Tracked 2-3 Working Day

International Orders

Delivery is calculated at checkout.

Note: Next day delivery is not guaranteed for orders placed after 3:00pm. Prices Ex VAT.

1, 2 See delivery page for more details.

Advice & Support
Price Match Request

This is the non-rechargeable version of the Gasman, which is only available for oxygen and toxic gases. If you prefer a rechargeable version, please see this version instead >>

Sensor Details

The above drop down box offers a selection of the three most popular, standard Crowcon Non-Rechargeable Gasman Single Gas Personal Gas Detectors:

  • GSA-02-EA-Z: 0-25% vol. Oxygen (O2)
  • GSA-03-EA-Z: 0-500ppm Carbon Monoxide (CO)
  • GSA-o4-EA-Z: 0-100ppm Hydrogen Sulphide (H2S)

However other gas sensors are available, please consult the table below for a list of possible sensors available on the Crowcon Gasman Single Gas Personal Gas Detector. For further information, or to place an order for a Crowcon Gasman featuring one of the sensors below, please call our sales team. 

Sensor Code  Description
AA 0-100% LEL methane
AB 0-100% LEL propane
AC 0-100% LEL pentane
AE 0-100% LEL ethylene
AF 0-100% LEL hydrogen
AG 0-25% volume oxygen
AI 0-100ppm hydrogen sulphide
BF 0-250ppm hydrogen sulphide
AH 0-500ppm carbon monoxide
CS 0-500ppm carbon monoxide (H2 filtered)
BI 0-1500ppm carbon monoxide
AN 0-20ppm chlorine*
AR 0-100ppm ammonia
AS 0-1000ppm ammonia
AJ 0-20ppm sulphur dioxide
AP 0-1ppm ozone*  (includes ozone specific flow plate)
AL 0-20ppm nitrogen dioxide*
AK 0-2000ppm hydrogen
AQ 0-30ppm hydrogen cyanide
AT 0-5ppm phosphine*
AV 0-10ppm hydrogen fluoride*
AU 0-1ppm fluorine*
BB 0-1ppm phosgene*
CK 0-1ppm chlorine dioxide
CQ 0-100ppm nitric oxide
CI 0-10ppm ethylene oxide (rechargeable only)
HG 0-5% carbon dioxide IR (uncertified, for safe area only)
* Reactive gases - extra care is required during sampling and calibration due to the nature of these gases. Contact Crowcon technical support or review the product manual for further detail. 


Please note that as standard all our Crowcon Rechargeable Gasman Detectors are configured to comply with the English ATEX region and standard, however other configurations are available, please contact our sales team for more information, or to place an order for a Gasman configured to one of the regions and standards below.  

Region Code Description
001 English ATEX
012 N American CSA
015 Br Port INMETRO
004 Spanish ATEX 
006 German ATEX
007 Dutch ATEX  
008 Italian ATEX 
003 French ATEX 
017 Polish ATEX 

Crowcon Non-Rechargeable Gasman Single Gas Personal Gas Detector Description

Get an instant alert when gas is detected with Crowcon's Gasman, a small-size personal gas monitor which clips onto your clothing.

Made for the detection of a wide variety of gas types (configured to your needs), the Gasman is ideal for use in a wide variety of different applications ranging from oil/gas plants to chemical plants, steel works, hospitality, confined spaces and waste/water works.

The Gasman is configured as standard with two instantaneous alarm limits which will sound as soon as gas levels rise. The Gasman uses a triple alarm system - you can expect the monitor to flash red/blue LED indicators, emit an audible tone and vibrate as gas level spikes are detected, ensuring you can evacuate from the area as quickly as possible.

Crowcon's Gasman units are made for use in demanding conditions - as well as IECEx and ATEX ratings for use in hazardous environments, the monitor has a tough, overmoulded case to protect against impact and is IP65 rated against dust and water damage.

Gas levels are shown on the screen of the Gasman as a general reading - by combining the Gasman together with an optional RS232 communication set (sold separately), you can access logged gas readings over a period of time and read them back on a PC. Up to 900 hours of data can be stored on the Gasman and you can configure alarms, zero the unit, calibrate the unit and more.

Intrinsic Safety Rating

The Crowcon Gasman is designed to be used in potentially hazardous environments where there is a risk of igniting the atmosphere.

These units have the following ATEX and IECEx classifications (please ensure the environment you're working in is compliant with these regs).


  • ATEX II 1G Ex ia IIC T4 Ga, (-20°C ≥Ta≥ +65°C) Toxic/Oxygen
  • ATEX II 2G Ex ia d IIC T4 Gb, (-20°C ≥Ta≥ +65°C) Flammable
  • Class I Division 1, Groups A, B, C and D
  • Class I Division 1, Groups A, B, C and D


  • IECExBAS05.0038 Flammable Gas
    ECExBAS05.0039 Oxygen or Toxic Gas

Crowcon Gasman Single Gas Detector Key Features

  • Portable, wearable gas detector made for the detection of a single gas
  • Made tough - rugged polycarbonate housing with IP65 water/dust resistance and overmoulded case to protect against impact
  • Clip on the back for easy attachment to your clothes
  • 2 levels of instantaneous alarms - ensure you are alerted straight away when gas levels rise
  • Triple alarms ensure you never miss an alert - audible tone at 95dB, flashing red/blue LED indicators plus vibration
  • One button operation - easily switch between different settings
  • ATEX/IECEx compliant for use within hazardous environment
  • Fully interchangeable intelligent sensor modules
  • Backlit display - ideal for gas diagnostics and operating status
  • Ultra lightweight, comfortable design
  • Data logging capabilities with adjustable sampling rate (requires PC interface kit, sold separately)
  • Up to 2 years battery life

Optional Accessories

Need accessories for your Gasman? Please call our sales team quoting one of the part numbers below and they can add it to your order!

For a more comprehensive breakdown of the accessories, please download the manual available further below.

Part Number  Description
C02132 Gasman External Filter
M04851 Flow Cap Assembly
C01937 Aspirator Assembly
C01843 Shoulder Strap
C01844 Chest Harness Strap Kit - consists of two straps (harness plate sold separately)
C011304 Chest Harness Kit (harness plate and 2 straps)
C01983 Leather Carry Case - either wear on belt or use with shoulder strap
C01892 Gas Test Kit (includes trigger regulator with 1m gas supply tube, flow cap, magnet and 2m gas vent tube)
E07532 PC Lead (9 way D, female to female)
C02097 USB to RS232 Adaptor
Part CodeGSA-02-EA-Z

Crowcon Gasman Technical Specifications

Dimensions 90 x 48 x 24mm (3 1/2 x 1.9 x 1 inches)
Weight 138g (Flammable)
129g (Oxygen)
118g (Toxic)
Housing, Degree of Protection Ingress Protection IP65 (NEMA 4)
Operating Temperature -20 to 55°C (-4 to 131°F)
Humidity 20-99% RH, non-condensing for continuous operation
Display Custom LCD with backlight. Starburst characters for number and text display, plus screen icons for status and mode
Warm-Up Time 90 seconds maximum
Response Time (Typical) Approx 20 seconds for most toxic and flammable sensors, 10 seconds for oxygen
Audible Alarms 95dBa (multiple alarm sounds allow selection of distinctive tones for different alarms)
Visible Alarms Dual colour red/blue flashing LEDs in gas hazard
Vibrating Alarm Internal vibrating alarm
Repeatability ±2% FSD, 6 months
ATEX Essential Health and Safety Requirement, clause 15.9
Safety Certificate No. BASEEFA04ATEX0383 Flammable Gas
BASEEFA04ATEX0384 Oxygen or Toxic Gas
IECEx IECExBAS05.0038 Flammable Gas
IECExBAS05.0039 Oxygen or Toxic Gas
European Approval Codes ATEX II 1G Ex ia IIC T4 Ga, (-20°C ≥Ta≥ +65°C)
ATEX II 2G Ex ia d IIC T4 Gb, (-20°C ≥Ta≥ +65°C)
USA Approval Codes Class I Division 1, Groups A, B, C and D
Canadian Approval Codes Class I Division 1, Groups A, B, C and D
Standards (Safety) EN60079-0, EN60079-1, EN60076-11, 94/9/EC
Standards (Safety) Canada CSA22.2, 152
Operation EN50270, EN50271, IEC61508, EN61779
0 Reviews Overall Rating

Write a Review

Write Your Own Review
You're reviewing:Crowcon Gasman Single Gas Personal Gas Detector - Non-Rechargeable
Your Rating

Subscribe to our Newsletter

International Enquiry