Crowcon T4x – Portable multi-gas detector

Crowcon T4x – Portable multi-gas detector

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Crowcon T4x portable gas detector

Crowcon T4x – Portable multi-gas detector

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The Crowcon T4x is a rugged, easy-to-use portable, multi-gas detector that provides advanced protection against four of the most common gas hazards:

  • Carbon Monoxide (CO)
  • Hydrogen Sulphide (H2S)
  • Flammable Gases (MPS)
  • Oxygen Depletion (O2)

This product is now available with improved detection of pentane, hexane, and other long-chain hydrocarbons. This offers additional industry compliance and a low cost of ownership.

The Crowcon T4x portable multi-gas detector uses advanced molecular property spectrometer (MPS) sensor technology to detect and accurately identify over 15 different flammable gases in one device. It features a dual toxic sensor (CO and H2S) with a 3-year life.

T4x compliance badges

Drop-tested to 4m and well protected from water ingress through IP65 and IP67 certification, it can be used in the most demanding environments, including confined spaces and hazardous industrial sites.

The Crowcon T4x has a large single-button and intuitive menu system that allows it to be operated wearing gloves with minimal training. It also features a positive safety indicator, which provides a visual indication of the gas levels present.

Additionally, the T4x reduces the number of sensor replacements by 75%, as only one sensor needs replacing over the device’s lifetime, which makes it the product of choice.

Why use the Crowcon T4x portable gas detector?

The T4x contains a wide range of useful features that makes it a powerful and useful device:

  • Increased safety: The T4x can help you identify and avoid hazardous gas levels, which can help prevent accidents and injuries.
  • Reduced risk of liability: By using a gas detector, you can help reduce your risk of being held liable for accidents or injuries caused by hazardous gas exposure.
  • Compliance with safety regulations: In many industries, it is required by law to use a gas detector. By using the T4x, you can help ensure that you are following all applicable safety regulations.
  • 35+ hours battery: This allows multiple or longer shifts to be worked between recharging. It features a TWA (time-weighted average) Resume function, which calculates toxic gas exposure over an entire work shift.
  • Long-life O2 sensor with a 5-year warranty.
  • Triple alarm system (audible and visual alarms)
  • Ingress Protection rated IP65 and IP67, water and dust resistant
  • Data Logging
  • Remote Monitoring
  • ATEX Approved


If you are working in a hazardous environment, the Crowcon T4x portable gas detector is a valuable tool that can help you stay safe.

You can view a range of Crowcon Gas Detectors Here.

For further information and expert advice call our team on 02920 759 683

Related Blog Posts:

Crowcon T4 Portable Gas Detector: Overview

Crowcon Launches a New Sensor for their T4

Portable Gas Detectors Essential for Confined Space Safety


T4x Gases and Ranges




Long-Life Oxygen (O2) 0-30% Vol. 0.1% Vol.
Flammable (MPS) 0-100% LEL 1% LEL
Hydrogen sulphide (H2S) 0-100ppm 1ppm
Carbon monoxide (CO)0-1000ppm 1ppm


SizeW135 x H80 x D35 mm (5.3 x 3.1 x 1.4in)
Weight282g (9.9oz)
DurabilityDrop tested to 4m onto concrete
AlarmsAudible >95dB
Bright red/blue visual LEDs
Integrated vibrating alert
DisplayFront mounted, backlit. Optional 180° flip for easy viewing whilst worn
Logging130 hours of data logging; Up to 3500 events
BatteryRechargeable Li-ion
Up to 18-hour typical runtime (Standard sensor option)Up to 35 hours runtime (MPS and LLO2 options)
5.5 hour recharge
Operating temperature-20°C to +55°C (-4°F to +131°F)*
Humidity10 to 95% RH @ 40°C non-condensing
Ingress protectionIndependently tested to IP65 and IP67
ApprovalsATEX and UKCA II 1 G Ex ia IIC T4 Ga -20°C ≤ Ta ≤ +55°C (T4 Type 1)

II 2 G Ex db ia IIC T4 Gb Tamb -20°C to +55°C (T4 Type 2)

IECEx Ex ia IIC T4 Ga -20°C ≤ Ta ≤ +55°C (T4 Type 1) Ex db ia IIC
T4 Gb -20°C ≤ Ta ≤ +55°C (T4 Type 2)

UL USA Use in hazardous locations Class 1 Div 1 groups
A,B,C,D only as to intrinsic safety

MED Directive 2014/90/EU

InterfaceUSB communications lead
AccessoriesIncluded with T4:

Integrated alligator clip and tethering loop

Bump/Calibration plate

Available separately:
Single unit cradle charger, 10 unit cradle charger; Vehicle charger
Clip on filter plate for sensor protection in dusty environments
I-Test automated bump and calibration station

Crowcon Connect Compatible?Yes

* Toxic and oxygen sensors are not rated for continuous operation above 50°C (122°F)




Below is a small selection of the accessories available for the T4x.

Bump/Calibration plate



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