Crowcon Gas-Pro Multi Gas Detector

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Gas-Pro is for detection of a variety of multiple gas configurations as well as confined space process guidance by offering 5 gas support including a dedicated pre-entry check mode and optional pump feature.

Now supported by the I-Test bump test and calibration station.


The Gas-Pro portable multi gas detector offers detection of up to 5 gases in a compact and rugged solution. It has an easy-to-read top mount display making it easy to use and optimal for confined space gas detection..

An optional internal pump, activated with the flow plate, takes the pain out of pre-entry testing and allows Gas-Pro to be worn either in pumped or diffusion modes.

User Friendly

  • Top Mount Display – makes it easy to read at a glance
  • Simple Single Button Operation – can be used whilst wearing gloves
  • Intuitive Functionality – reduces training time


  • Monitor 5 Gases From Many Different Options – detect gases such as Hydrogen Sulphide, Carbon Monoxide and Oxygen Depletion while offering multiple uses within one compact detector
  • Pumped And Diffusion Solutions
  • Multiple Languages
  • Automatic Fail-Safe Flow Plate Recognition – takes away the pain of pre-entry testing
  • Specific And Unique Pre-Entry Check (PEC) Mode


  • Reliable Lithium-Ion Battery – provides over 14 hr use from a 7.5 hr charge
  • Water And Dust Resistant To IP65 And IP67 – provides effective confined space gas detection, even in the harshest environments
  • Bump And Calibration Reminders – Full compliance


Size 43 x 130 x 84mm (1.7 x 5.1 x 3.3ins)
Weight 309g 4 gas (10.8oz)/ 340g pumped (11.9oz) 

333g 5 gas (11.7oz)/ 362g pumped (12.7oz)

Alarms Audible >95dB @ 30cm (98dB @30cm in loud mode)
Visual – all angle dual red/blue LEDs
Vibrating alert
Display Top mount for ease of view with dual colour backlight (green/red)
Data logging 125hr at 10-second intervals (45,000 logs)
Event logging Alarm, over range, calibration, bump, on/off, TWA, 1000 events
Battery Rechargeable Li-ion, >14hr (13 hours pumped operation) based on CH4, O2, H2S, CO
Typical charge time 7.5hr
Sampling Internal pump as option
Operating temperature -20°C to +55°C (-4°F to +131°F)
Storage  -20°C to +65°C (-4°F to +149°F)
Humidity 10 to 95% RH+
Ingress protection Independently tested to IP65 and IP67
Approvals IECEx: Ex db ia IIC T4 Gb Tamb -20°C to +55°C
ATEX and UKCA: II 2 G Ex db ia IIC T4 Gb Tamb -20°C to +55°C
UL: Class 1, Division 1, Groups A, B, C, and D UL 913, UL 60079-0 and UL 60079-11
INMETRO: Ex db ia IIC T4 Gb Tamb -20°C to +55°C
Marine Equipment Directive: MED 1500009
Compliance FCC and CE. Complies with EMC Directive 2014/30/EU, EN50270 and EMC FFC CFR 47 Part 15, ICES-003
Interface Data connection for gas test solutions and direct to PC
Charging Direct connection to multi-regional power supply
Vehicle charger adaptor
Desktop cradle
USB power and communications lead
Crowcon Connect Compatible? Yes


Gases and Ranges

Gas Range Typical Alarms Resolution
Ammonia (NH3)  0-100ppm 25ppm 1ppm
Ammonia (NH3) 0-1000ppm N/A 1ppm
Carbon Dioxide (CO2)  0-5% vol.  0-5% vol.  0.01% vol.
Carbon Monoxide (CO)  0-2000ppm  20ppm 1ppm
Carbon Monoxide (CO)  0-500ppm  20ppm 1ppm
Carbon Monoxide
(Hydrogen Filtered)
 0-2000ppm 20ppm 1ppm
Chlorine (Cl2)  0-5ppm 0.5ppm 0.1ppm
Dual toxic (CO-H2S) H2S 0-100ppm
CO 0-500ppm
Flammable  0-100% LEL  20% LEL  1% LEL
Hydrogen (H2)  0-1000ppm  N/A  1ppm
Hydrogen Sulphide (H2S)  0-100ppm  5ppm  1ppm
Nitrogen Dioxide (NO2)  0-20ppm  1ppm  0.5ppm
Oxygen (O2)  0-25% vol.  19.5% / 23.5% vol.  0.1% vol.
Ozone (O3)  0-1ppm  0.1ppm  0.01ppm
Sulphur dioxide (SO2)  0-20ppm  1ppm  0.1ppm
Chlorine dioxide (ClO2)  0-1ppm  0.1ppm  0.1ppm
Nitric oxide (NO)  0-100ppm  25ppm  1ppm

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