Crowcon Personal Single Gas Monitor - Rechargeable, 0-1ppm Phosgene - GS-BB-Y-A

  • Crowcon Personal Single Gas Monitor - Rechargeable, 0-1ppm Phosgene - GS-BB-Y-A
  • Crowcon Personal Single Gas Monitor - Rechargeable, 0-1ppm Phosgene - GS-BB-Y-A
  • Crowcon Personal Single Gas Monitor - Rechargeable, 0-1ppm Phosgene - GS-BB-Y-A
  • Crowcon Personal Single Gas Monitor - Rechargeable, 0-1ppm Phosgene - GS-BB-Y-A

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GS-BB-Y-A Personal Single Gas Monitor - Rechargeable, 0-1ppm Phosgene by Crowcon

Gasman is a range of rugged, compact single gas personal monitors designed for use in the toughest environments. Its stunningly compact and lightweight design makes it ideal for use in industries such as oil and gas, chemical plants (with exotic gases), steel works (special CO sensor), hospitality (CO2) 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 overmoulding - high impact resistance

Effective warning

  • 2 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 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

Technical Specifications
Size 90 x 48 x 24 mm (3.5 x 1.9 x 0.95 ins)
Weight Flammable: 138g (4.9oz)
Toxic: 118g (4.1oz)
Oxygen: 129g (4.6oz)
Carbon monoxide: 139g (4.9oz)
Typical response times (T90) Flammable: 20s
Toxic gas: 20s
Oxygen: 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
Vibrating: Internal vibrating alarm
Display Custom LCD with backlight and 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.
Display modes Normal display: Real time gas concentration levels
Display recall: Peak readings and TWA
Datalogging 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); ETO
Operating time* Rechargeable: 12 hours minimum for flammable unit
Non rechargeable: Up to 2 years
Sampling Optional manual aspirator
Operating temperature Range** -20°C to + 65°C (-4°F to +149°F)
Humidity 20-90% RH
Ingress protection IP65
Operation standards EN50270, EN50271, IEC61508, 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
*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.
**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.

Gases and Ranges
Standard Alarm (US)
Carbon monoxide (H2 filtered)
Ammonia (NH3)
Carbon monoxide (CO)
Carbon dioxide (CO2)
Chlorine (CL2)
0-100% LEL
10% LEL
Fluorine (F2)
Hydrogen (H2)
Hydrogen cyanide (HCN)
Hydrogen fluoride (HF)
0-10 ppm
Hydrogen sulfide (H2S)
0-100 ppm
Nitric oxide (NO)
0-100 ppm
Nitrogen dioxide (NO2)
0-20 ppm
Oxygen (O2)
Ozone (O3)
0-1 ppm
Phosphine (PH3)
0-5 ppm
Phosgene (COCL2)
0-1 ppm
Sulfur dioxide (SO2)
0-20 ppm