Crowcon GasPro 4 Gas Detector (CO, H2S, O2 & CH4)

Crowcon GasPro 4 Gas Detector (CO, H2S, O2 & CH4)

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Crowcon GasPro 4 Gas Detector

The perfect solution for confined space monitoring, this branded Crowcon GasPro device detects a total of 4 different gases, including CO, H2S, O2 and CH4. Robust and lightweight in its design, the Gas-Pro features a user-friendly display for easy reading.

Offering numerous configuration settings, this gas detector also features a optional internal pump, which is activated by the flow plate; this results in a seamless user experience that takes the pain out of pre-entry testing, allowing the user to switch between pumped or diffusion mode.

Using a one button operation that reduces training time, this gas monitor is highly function, which includes a automated fail safe to minimize risks and a reliable lithium ion battery (with a charge of up to 14 hrs).

Compatible Gas Types

Click here to find out what other gas detectors, spares & accessories we have to offer; also check out our handy blog article on The Origin of Portable Gas Detectors.



Size43 x 130 x 84mm (1.7 x 5.1 x 3.3ins)
Weight309g 4 gas (10.8oz)/ 340g pumped (11.9oz)333g 5 gas (11.7oz)/ 362g pumped (12.7oz)
AlarmsAudible >95dB @ 30cm (98dB @30cm in loud mode) Visual – all angle dual red/blue LEDs Vibrating alert
DisplayTop mount for ease of view with dual colour backlight (green/red)
Data logging125hr at 10-second intervals (45,000 logs)
Event loggingAlarm, over range, calibration, bump, on/off, TWA, 1000 events
BatteryRechargeable Li-ion, >14hr (13 hours pumped operation) based on CH4, O2, H2S, CO Typical charge time 7.5hr
SamplingInternal pump as option
Operating temperature-20°C to +55°C (-4°F to +131°F)
Storage-25°C to +65°C (-13°F to +149°F)
Humidity10 to 95% RH+
Ingress protectionIndependently tested to IP65 and IP67
ApprovalsIECEx: Ex d ia IIC T4 Gb Tamb -20°C to +55°C ATEX: II 2 G Ex d ia IIC T4 Gb Tamb -20°C to +55°C UL: Gas detector use in hazardous locations Class 1, Division 1, Groups A, B, C, and D only as to intrinsic safety INMETRO
ComplianceFCC and CE. Complies with EMC Directive 2014/30/EU, EN50270 and ICES-003
InterfaceData connection for gas test solutions and direct to PC
ChargingDirect connection to multi-regional power supply Vehicle charger adaptor Desktop cradle USB power and communications lead

Sensor Ranges

GasRangeTypical AlarmsResolution
Ammonia (NH3)0-100ppm25ppm1ppm
Carbon dioxide (CO2)0-5% vol.0.5% vol.0.01% vol.
Carbon monoxide (CO)0-2000ppm30ppm1ppm
Carbon monoxide (CO)0-500ppm30ppm1ppm
Carbon monoxide
(hydrogen filtered)
Chlorine (Cl2)0-5ppm0-5ppm0.1ppm
Dual toxic (CO-H2S)H2S 0-100ppm
CO 0-500ppm
Flammable0-100% LEL20% LEL1% LEL
Hydrogen sulphide (H2S)0-100ppm5ppm1ppm
Nitrogen dioxide (NO2)0-20ppm1ppm0.5ppm
Oxygen (O2)0-25% vol.19%/ 23% vol.0.1% vol.
Ozone (O3)0-1ppm0.1ppm0.01ppm
Sulpher dioxide (SO2)0-20ppm1ppm0.1ppm
Chlorine dioxide (ClO2)0-1ppm0.1ppm0.1ppm
Nitric oxide (NO)0-100ppm25ppm1ppm


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