Crowcon Gasman Portable CO Detector, GS-AH-A-012-G

Crowcon Gasman Portable CO Detector, GS-AH-A-012-G

Regular price $363.00

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The Crowcon Gasman is a rugged, compact single gas detector, designed for use in the toughest environments. Its compact and lightweight design makes it the ideal choice for industrial gas detection, in oil and gas, chemical plants (with exotic gases), steel works (special CO sensor), hospitality (CO2), renewable energy (hydrogen) and waste and water works. Weighing just 130g, it is extremely durable, with high impact resistance and dust/water ingress protection, loud 95 dB alarms, a vivid red/ blue visual warning, single-button control and an easy-to-read, backlit LCD display to ensure clear viewing of gas level readings, alarm conditions and battery life. Data and event logging are available as standard, and there is a built-in 30 day advance warning when calibration is due. Gasman is also available in a safe area CO2 version offering 0-5% carbon dioxide measurement.


  • Tough Polycarbonate Housing – protects you in the harshest environments

  • Water And Dust Resistant To IP65

  • Full Overmolding – high impact resistance

Effective warning

  • Two Levels Of Instantaneous Alarm And TWA Alarms for toxic versions – ensures prompt evacuation from hazardous zone

  • 95dB Audible Alarm

  • Vivid Twin Red/Blue Visual Alarm – if ambient noise is high, Gasman alerts you by vibrating and with the high impact blue/red LED alarms

  • Internal Vibrating Alarm


  • Versions Available For Flammable Gas, Oxygen And Toxic Gases – gas detector tailored to your requirements

  • Rechargeable Versions for all gas types

  • Non-Rechargeable Versions so ideal for oxygen and toxic gases

  • Real-Time TWA And Peak Display Options

  • Fully Interchangeable Intelligent Sensor Modules

User friendly

  • One Button Operation – quick and easy to use

  • Backlit Display For Gas Diagnostics And Operating Status – easy to read

  • Ultra Lightweight; Just 85g For Toxic Versions – comfortable to wear

Size 3.5 x 1.9 x 0.95 in. (90 x 48 x 24 mm)
Weight Flammable: 4.9 oz (138g)
Toxic: 3 oz (85g)
Oxygen: 4.6 oz (129g)
Carbon monoxide: 4.9 oz (139g)
Typical response times (T90) Flammable: 20s
Flammable (MPS): 17s
Toxic gas: 20s
Oxygen: 10s
Oxygen (Long-Life): 10s
Alarms Audible: 95dB; Multiple alarm options let you select distinctive tones for different alarm levels
Visible: Dual colors red/blue flashing LEDs in a gas hazard
Internal vibrating alarm
Display Custom LCD with backlight, with display of gas concentration. Graphic symbols for battery (with proportional indication of remaining operation time), and display mode. Start up indication when calibration is due within 30 days, calibration overdue or service required.
Normal display: Real time gas concentration levels
Display recall: Peak readings and TWA
Data logging Full timed datalogging with adjustable sample rate, set to 1 min. data rate as default.
900 hours storage at 1 min. interval (54,000 logs), >4800 events
Battery Rechargeable lithium battery for all gas types
Non-rechargeable lithium battery for toxics and oxygen (excluding CO2)
Operating time Rechargeable with MPS: > 3days
Rechargeable: 12 hours minimum for flammable unit
Non-rechargeable: Up to 2 years
Operating time will depend on operating pattern and alarm occurrence. Frequent or long lasting alarms and use of the optional confidence beep will reduce battery life.
Sampling Optional manual aspirator
Operating temperature -4°F to +149°F (-20°C to +65°C)
Toxic and oxygen sensors are not rated for continuous operation at high temperatures. Consult Crowcon if operating temperatures are likely to exceed 40°C (104°F) for extended periods.
Humidity 5 – 95% RH
0 to 99% RH (O2 LL MPS)
Ingress protection IP65
Approvals Europe: Toxic or O2: ATEX II 1G Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +65°C) BASEEFA04ATEX0384
Flammable: ATEX II 2G Ex ia db IIC T4 Gb (-20°C ≤ Ta ≤ +65°C) BASEEFA04ATEX0383
Flammable (MPS): ATEX II 1G Ex ia IIC T4 Ga (-20°C ≥Ta ≥ +65°C) BASEEFA04ATEX0383
International: Toxic or O2: IECEx Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +65°C) BAS05.0039
Flammable: IECEx Ex db ia IIC T4 Gb (-20°C ≤ Ta ≤ +65°C) BAS05.0038
North America: CSA Class 1 Groups A, B, C, D Division 1
Standards Europe: EN60079-0, EN60079-11, EN60079-1, ATEX 2014/34/EU
North America: CSA22.2, 152EN50270, EN50271, EN61779, EN45544
PC Interface RS232 connection from interface module in charger
RS232/USB converter available
Calibration Gasman can be routinely calibrated using Portables PC software or by using Checkbox IMH
Accessories Gasman is supplied with an integral alligator clip.
Optional accessories Gas test kit, Gasman external filter, leather carry case, single way charger, charger interface software and communication kit (excluding PSU), 5 way multi-charger
Crowcon Connect Compatible? Yes
Gas Range Standard Alarm
Ammonia (NH3) 0-1000 ppm 25 ppm
Carbon Monoxide (CO) 0-1500 ppm 30 ppm
Carbon Dioxide (CO2) 0-5% vol. 0.5% vol.
Carbon Monoxide (H2 filtered) 0-500 ppm 30ppm
Chlorine (Cl2) 0-20 ppm 0.3 ppm
Chlorine Dioxide (CIO2) 0-1 ppm 0.1 ppm
Ethylene Oxide (ETO) 0-10 ppm 3 ppm
Flammable True LEL (MPS) 0-100% LEL 20% LEL
Flammable 0–100% LEL 20% LEL
Fluorine (F2) 0-1 ppm 0.5 ppm
Hydrogen (H2) 0-2000 ppm N/A
Hydrogen Cyanide (HCN) 0-25 ppm 5 ppm
Hydrogen Fluoride (HF) 0-10 ppm 1 ppm
Hydrogen Sulfide (H2S) 0-250 ppm 5 ppm
Nitric Oxide (NO) 0-100 ppm 25 ppm
Nitrogen Dioxide (NO2) 0-20 ppm 1 ppm
Oxygen (O2), Long-Life 0-25% vol. 19.5% / 23.5% vol.
Oxygen (O2) 0-25% vol. 19.5% / 23.5% vol.
Ozone (O3) 0-1 ppm 0.1 ppm
Phosphine (PH3) 0-5 ppm 0.1 ppm
Phosgene (COCL2) 0-1 ppm 0.1 ppm
Sulfur Dioxide (SO2) 0-20 ppm 1 ppm

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