Crowcon Detective+ | Portable Flammable Gas Detector ATEX Certified

Crowcon Detective+

Portable Gas Detectors

Crowcon Detective+ | ATEX Zone 1 & Zone 2 Hazardous Areas

Crowcon Detective - Portable Gas DetectorCrowcon Detective+ Portable Gas Detector - Battery LifeCrowcon Detective+ Gas Detector - IP65Crowcon Detective+ Gas Detector - Optional Internal Pump

Fixed Gas Detection & Portable Gas Safety | Industrial Locations & Hazardous Area Zones

The Crowcon Detective+ portable gas detector is an area monitoring gas detector designed for group protection and can be used to provide a virtual fence line and in areas for the presence of selected flammable gases and triggers an audible and visual alarm if set levels are reached.

Crowcon Detective+ gas detection equipment is rugged and interconnectable with up to 25 Detective+ units up to 100m apart from each other to indicate an alarm sensed by any one unit.

The Detective+ units can be connected via cables or via the Detective Wireless module.

The Detective+ gas detector can now be fitted with infra-red (IR) sensors providing either CO₂ detection or allowing higher levels of flammable gas monitoring. IR sensors also provide immunity to the poisoning effects which standard flammable gas sensors can suffer from.

C-Test bump solution with configuration update keeps the Crowcon detectors correctly configured to ensure the product is consistently up-to-date without the need for a service or technician team.

The Detective+ portable flammable gas detector is also water and dust resistant to IP65.

➡ Crowcon Detective+ – Flammable Gas Detector ATEX Certified – call T&D Sales for price, delivery and stock.

Crowcon Detective+ Gas Detector

Key Features

Gas Detecting

Should you require a quotation, check stock or technical customer service about the Crowcon Detective+ please do not hesitate to contact T&D.

  • Simple Operation – The Crowcon Detective+ is available with infrared sensors, has a clear display and has an optional built in pump providing a fast response with clear information for gas identification
  • Rugged Design – The Detective+ has a rugged tripod design that has a folding or flexible legs and meets IP65 specifications
  • Audible Alarms – 25 Detective+ units can be linked together up to 100m from nearby units.  A visual red alarm with an audible and visible confidence blip. The units sending the alarm flash faster with multiple beacons to ensure fast reactions to gas hazards

Crowcon Detective+ Bump Testing & Calibration

Routine bump testing is recommended for the range of Crowcon portable gas detectors prior to each use. Bump testing is a brief application of a gas to the sensor to invoke a prescribed reaction, ensuring the gas detector reacts as expected.

Bump testing provides a quick, easy and direct method of verifying gas detectors are performing as required and takes a lot less time than ‘zeroing’ the device. 

The bump test is widely accepted as a suitable method of testing gas detection equipment. 

Crowcon Detective+ Gas Detector – Product Specifications

The Crowcon range of gas detectors provide detection and level monitoring of several harmful, flammable and toxic industrial gas types including ATEX and IECEx certified detectors for safe use in potentially explosive atmospheres and hazardous area zones with hydrocarbon gas detection capability – Thorne & Derrick distribute economical, reliable and innovative gas detection equipment.

Size 640 x 455 x 455mm (25.2 x 17.9 x 17.9ins)
Weight 7.5kg (19oz)
 Visible Alarms Three large, top mounted red LED clusters and a single red LED on control panel.
Alarm mode: LED clusters flash in quick succession. LED clusters of linked Detectives repeating the alarm, flash slower than LED lights on those Detectives sensing the hazard.
Normal working: Slow flashing green LED.
Battery low: Rapid flashing green LED
Audible Alarms Wailing, omni-direction siren, 104 dBA at 1m
Display High contrast LCD with back light. Values and units for up to 4 gases displayed simultaneously at current, TWA or peak levels, low battery, real time and elapsed calibration and configuration data also displayed.
Battery Standard 6V, 7.2Ah, sealed lead acid battery pack
Optional 6V, 12Ah high capacity pack
Battery Life Up to 36 hours with 7.2Ah battery
Up to 60 hours with optional 12A battery
Typical Response Times Methane 20s, oxygen 10s, typical toxic gas 20s, IR 20s
Expected Sensor Life Flammable 5 years, toxic 3 years, oxygen 2 years minimum, IR>5 years
Humidity 15–95% RH non-condensing**
Ingress Protection IP65
Operating Temperature Range -20ºC to +50ºC (-4ºF to 122ºF)*
Shelf life 6-month shelf life prior to activation. Shown on box label
Sensor Range H2S: 0-100ppm. CO: 0-300ppmO2:  0-30% vol
Approvals Europe: ATEX II 2G Ex ib d IIC T4 (Tamb -20°C to + 50°C)
International: Ex ib d IIC T4 (Tamb -20°C to + 50°C)
Standards EN 50014: 1997 + A1 & A2; EN 50018: 2000: EN 55011: 1998; DD ENV 50204:1999:EN 61010-
1: 2001; EN50020: 2002: IEC 60079-0: 2000, IEC 60079-1: 2003: IEC 60079-11: 1999
EMC EN 50270, FCC CFR47 Part 15, Directive 2014/30/EU EN50270
PC Interface Via RS232 lead. Portables PC software can be used to set alarms, clock, datalogging interval and password, manages datalogging giving graphical display of instrument log file and allows to export to spreadsheet
Calibration Quick calibration using internal menu command, Portables PC
Accessories Baffle plate, interconnecting leads, RS232 communications lead, Detective NET
Sampling Internal electric sampling pump option, manual aspiration
Linked Detectives With cable connection, up to 12 units can be linked to provide perimeter or area monitoring
With Detective NET , up to 25 units can be linked to provide perimeter or area monitoring

* Toxic and oxygen sensors are not rated for continuous operation at high temperatures. Consult T&D if operating temperatures are likely to exceed 40°C (104°F) for extended periods.

** Toxic and oxygen sensors RH specifications vary, consult Crowcon for specific operating humidities.

Crowcon Detective+

Crowcon Detective+: versatile and reliable in arduous environments including offshore platforms and the sands of the Middle East

Crowcon Detective+ Gas Detector

Gases Detected & Ranges

Should you require a quotation, check stock or technical customer service about the Detective+ please do not hesitate to contact us.

Detectable Gas Gas Detector Range Gas Detector Alarm
Flammable Gas 0-100 LEL 20% LEL
Oxygen O2 0-25% 19% & 23%
Hydrogen Sulphide H2S 0-50 ppm 10 ppm
Carbon Monoxide CO 0-500 ppm 35 ppm
Sulphur Dioxide SO2 0-10 ppm 2 ppm
Chlorine CL2 0-5 ppm 0.5 ppm
Nitrogen Dioxide NO2 0-10 ppm 2 ppm
Phosphine PH3 0-5 ppm 0.5 ppm
Ammonia HN3 0-50 ppm 25 ppm
Ammonia NH3 0-1000 ppm N/A
Hydrogen (Non flammable levels) 0-2000 ppm N/A
Hydrogen Cyanide HCN 0-25 ppm 10 ppm
Hydrogen Chloride HCL */+ 0-10 ppm 5 ppm
Chlorine Dioxide CIO2 + 0-1 ppm 0.1 ppm
Hydrogen Fluoride HF + 0-10 ppm 1 ppm
Ethylene Oxide C2H4O * 0-10 ppm 5 ppm
Volatile Organic */+ 0-100 ppm N/A

* One biased sensor per Detective+.

+ Reactive gas, care required during sampling, contact Crowcon for details.

Industrial Locations & Hazardous Areas
Crowcon Detective+ Gas Detector Infrared Sensors

Several gas detection sensors are available for use with the Crowcon Detective+ gas detector.

Detectable Gas Gas Detector Range Gas Detector Alarm
Flammable Gas 0-100% LEL 20& LEL
Flammable Gas 0-100% v/v None
Available for methane, propane, butane or ethylene
Carbon Dioxide CO2 0-5% v/v 0.5 and 1.5% v/v

➡ Also see the range of Crowcon Fixed Gas Detectors

Crowcon Detective+

Crowcon Detective+ Gas Detector: suitable for use when workers are working at heights as they can be alerted of any gas hazards thanks to the Detective+ with Detective Wireless modules.

Crowcon Detective+
Hazardous Area ATEX Certified Gas Detector


Hazardous Area Classification  

Europe: ATEX II 2G Ex ib d IIC T4 (Tamb -20°C to + 50°C)
International: Ex ib d IIC T4 (Tamb -20°C to + 50°C)

The hazardous area gas detector is Category 2G suitable for use in Zone 1 and Zone 2 with flammable gases and vapours – this includes apparatus groups IIA, IIB and IIC and with temperature classes Tl, T2, T3 and T4 3. The Crowcon Detective+ is only certified for use in ambient temperatures in the range -20°C to +50°C and should not be used outside this range.

Crowcon Detective+


Crowcon Detective+ Gas Detector - Flammable Gas Detector ATEX Certified

Crowcon Detective+ Gas Detector – Flammable Gas Detector ATEX Certified

T&D provide competitive prices and delivery for all Crowcon Gas Detectors, including the Crowcon Detective+.

Gas Detection In High Voltage Substations, SWITCHGEAR  & Hazardous Area Battery Rooms

See how Crowcon F-Gas Detector is used in the electrical utility industry to provide safe gas detection of SF6 in high voltage substations and gas insulated switchgear.

Gas Detection In High Voltage Substations, Switchgear & Cable Chambers. Image : ABB.

Gas Detection In High Voltage Substations, Switchgear & Cable Chambers. Image : ABB.

 ➡  Did you know? T&D distribute Zone 1 Hazardous Area ATEX Certified Lighting, Heating, Power products – this includes hazardous area portable heaters, LED lighting, plugs and sockets, control panels, enclosures and junction boxes for Zone 1 use.

Data Sheets