COVID-19 News: Open for Business
All Crowcon Products

Crowcon T4 Portable Personal Multigas Detector

Reward Points (?)

Logged in, worth £6.68, read more.

As low as £334.80 £279.00
Free UK Delivery* Delivery Options

UK - Zone 1 Orders

England, Wales & most of Scotland.

Free 3-5 Working Day1
Orders Over £99 & Selected Items

Economy 2-3 Working Day1
From £1.95

Tracked 2-3 Working Day

Express Next Working Day

Priority Next Working Day
£14.95 (Pre-Noon)
£19.95 (Pre-10:30am)

Saturday & Sunday
£14.95 (Pre-Noon)

UK - Zone 2 Orders

Highlands, Islands & Northern Ireland.

Free 3-5 Working Day1
Selected Items (Calculated at Checkout)

Economy 2-3 Working Day2
From £1.95

Tracked 2-3 Working Day

International Orders

Delivery is calculated at checkout.

Note: Next day delivery is not guaranteed for orders placed after 3:00pm. Prices Ex VAT.

1, 2 See delivery page for more details.

Advice & Support
Price Match Request

Important Note: the Crowcon T4 is available in several gas configurations.  Using the dropdown box, select between the following options:

  • T4-HOCA: 4 Gas Sensor, Detects Oxygen (O2), Methane (CH4), Hydrogen Sulfide (H2S) and Carbon Monoxide (CO)
  • T4-ZOCA: 3 Gas Sensor, Detects Oxygen (O2), Carbon Monoxide (CO) and Methane (CH4)
  • T4-HOZA: 3 Gas Sensor, Detects Hydrogen Sulfide (H2S), Oxygen (O2) and Methane (CH4)
  • T4-ZOZA: 2 Gas Sensor, Detects Methane (CH4) and Oxygen (O2)
  • T4-HOCA-H2: 4 Gas Sensor, Detects Hydrogen Sulfide (H2S), Oxygen (O2), Carbon Monoxide (CO - H2 Resistant) and Methane (CH4)
  • TR-ZOCA-H2: 3 Gas Sensor, Detects Oxygen (O2), Carbon Monoxide (CO - H2 Resistant) and Methane (CH4)
  • T4-ZOCZ - 2 Gas Sensor, Detects Oxygen and Carbon Monoxide

This version of the T4 does NOT include the charger as standard. You can order this separately by following this link. Alternatively, you can purchase the T4 with a charger here.

Above models are set to standard approval, for different regions/alarm levels, please contact our sales before purchase.

The table below indicates the regions and approvals available for the Crowcon T4 Portable Personal Multigas Detector.

Region/Approval Default Alarm Levels (alarm 1/ alarm 2) Language  Approval
Standard O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm EN ATEX, IECEx, UL
S2 O2: 19.0/23.5%, CH4: 10/20%, CO: 30/100 ppm, H2S: 5/10 ppm EN
DE O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm DE
ES O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm ES
FR O2: 19.0/23%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm FR
IT O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm IT
NL O2: 19.0/23.5%, CH4: 10/40%, CO: 25/50 ppm, H2S: 1.6/5 ppm NL
PL O2: 19.0/23%, CH4: 20/40%, CO: 20/100 ppm, H2S: 5/10 ppm PL
SG O2: 19.5/23.5%, CH4: 10/40%, CO: 25/100 ppm, H2S: 10/15 ppm EN
US O2: 19.5/23.5%, CH4: 10/20%, CO: 35/50 ppm, H2S: 10/15 ppm EN
BR O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm BP Inmento

About the Crowcon T4 Portable Personal Multigas Detector

An essential for anyone working in and around hazardous gases, Crowcon's portable, tough T4 multigas detector will protect you from rising gas levels, ensuring you are instantly alerted when you're in a dangerous situation.

Configured to your individual needs to detect up to four gases (oxygen, hydrogen sulfide, carbon monoxide and methane options all available), the Crowcon T4 uses a combination of three alarms - LED blinking red/blue lights, vibration and an audible tone - to alert you instantly when rising levels of gas are detected.

 The Crowcon T4 is made tough - in fact, it's Crowcon's toughest gas detector yet. A rugged integrated rubber boot protects the detector from drops up to a height of 4m (directly onto concrete!) and protects the T4 from water/dust ingress to IP65 and IP67. To protect the sensors, an optional clip-on filter cover can also be purchased, allowing accurate detection in even the most dirty, demanding environments. The T4 is also intrinsically safe - it's ATEX and Ul Class 1 Div 1 approved for use in potentially dangerous areas.

To ensure that gas content is accurately detected, the T4 has an individual sensor for every type of gas it detects. As these are specifically configured for each type of gas you choose when ordering your T4, you can always rely on the T4 to deliver effective, fast and reliable detection of multiple types of gas, every single time.

There's so much more to the T4 as well - this portable gas monitor also includes a large size, backlit screen which can be rotated 180° (ideal for viewing the screen when wearing the meter), 18 hour battery life per charge (ideal for longer shifts) and a positive safety indication system which shows if the meter is working safely (green light) or if something is wrong (red light).

TWA Resume Facility

With Crowcon's unique TWA Resume facility ensures that time weight average (TWA) of toxic gas exposure is calculated accurately over an entire work shift.

Using this facility, you can turn off the meter and switch it back on again with continued calculations, ensuring you won't exceed the exposure limit.

This video from Crowcon shows exactly how the function works.

Crowcon T4 Portable Personal Multigas Detector Key Features

  • Personal detector made for wearing on clothing, designed to detect multiple types of gas
  • Multiple selectable versions available - choose your version using the dropdown box at the top of the page
  • TWA resume function calculates total toxic gas exposure over an entire shift, even if the meter is turned off at any point
  • Rechargeable battery with 18 hour battery life (please note the charger is sold separately)
  • Backlit rotating LCD display - flip the screen 180 degrees when its clipped on your clothes, allowing it to be read without removing
  • Ultra tough, rugged design - thick anti-shock rubber casing allows the T4 to be dropped up to 4m onto concrete. Water and dust resistant to IP65 and IP67
  • Traffic light positive safety indicator - green light means everything is ok, red light means there's an issue which needs fixing
  • Intrinsically safe - ATEX and UL Class 1 Div 1 approved for use in hazardous environments
  • Dedicated sensors - one sensor for every gas type to ensure accurate detection
  • Triple alarm alerts - bright red/blue LEDs, vibration and 95dB audible alarm ensures you're instantly alerted to gas content
  • Easy to use - large size, single button and intuitive menu system minimise training and allow easy operation even when wearing gloves
  • Logging capabilities - store 130 hours of data at 10 second intervals, or 3500 events (downloading to PC requires optional software and connection cables)
  • Integrated crocodile clip for clipping onto clothing

What's Included?

  • Crowcon T4 Portable Personal Multigas Detector
  • Integrated Alligator Clip and Tethering Loop
  • Bump/Calibration Plate

Please don't forget that the charger for this product is NOT included as standard and must be ordered separately (here), alternatively please follow this link to view and/or purchase Crowcon T4 Portable Personal Multigas Detectors with a Charging Cradle.

Optional Accessories

Need the charger or other accessories for your T4? Please call our sales team quoting one of the part numbers below and they can add it to your order (part numbers in bold).

Product Code  Description
T4 Chargers
T4-CRD T4 Cradle charger a multi-region power supply 
T4-TWC T4 10 way charger and multi region power supply
Includes power cords for North America, Europe, UK
T4-VHL T4 vehicle charger and vehicle charging adaptor
Inmetro Certified
T4-VHL-BR T4 vehicle charger - Inmetro
Includes vehicle charging adaptor
Charging and Commns Cables
CH0106 Vehicle charging adaptor
For use with CH0102 charging lead
CH0102 Charging lead
For use with CH0106 vehicle charging adapter
CH0103 USB communications lead (not powered)
CH0104 USB dual communication and power lead
E011166 Power supply for 10 way charger
Includes power cords for North America, Europe, UK
Charging and Comms Cables - Inmetro Certified
CH0203 USB communications lead (not powered) - Inmetro
CH0204 USB communication and power lead - Inmetro
Hand Aspirator 
T4-ASP-KIT T4 aspirator kit, 20 metre
Contains aspirator plate, hand operated bulb and 20 metre hose
T4-ASP-CAP T4 aspirator plate
AC0504 Hand aspirator bulb
(Hose available separately)
C01757 Telescopic aspirator probe
M04032 Aspirator hose - per metre
Part CodeT4-ZOZL

Crowcon T4 Technical Specifications

Gases and Ranges
Gas Range Resolution
Oxygen (O2) 0-30% vol. 0.1% vol.
Flammable 0-100% LEL 1% LEL
Hydrogen Sulphide (H2S) 0-100ppm 1ppm
Carbon Monoxide (CO) 0-1000ppm 1ppm
Other Specs
Dimensions 135 x 80 x 35mm (5.3 x 3.1 x 1.4")
Weight 282g (9.9oz)
Durability Drop-tested 4m onto concrete
Alarms Audible: 95dB
Vibrating: integrated
Visible: bright red and blue LEDs
Display Front-mounted, backlit, 180° flip for easy viewing while worn
Logging Data: 130 hours of data at 10s intervals
Events: 3500
Battery Rechargeable Li-Ion
Battery Life: Up to 18 hour runtime
5.5 hour recharge
Environment Operating Temperature: -20 to 55°C (-4 to 131°F)*
Humidity: 10 to 95% RH @ 40°C non-condensing
Ingress Protection: Independently tested to IP65 and IP67
Compliance EMC: Directive 2004/108/EC
ATEX Ex II 2 G Ex d ia IIC T4 Gb Tamb -20 to +55°C
IECEx Ex d ia IIC T4 Gb Tamb -20 to +55°C
UL Use in hazardous locations Class 1 Div 1 groups A, B, C, D only as to intrinsic safety
INMETRO Ex d ia IIC T4 Gb Tamb -20 to +55°C

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

0 Reviews Overall Rating

Write a Review

Write Your Own Review
You're reviewing:Crowcon T4 Portable Personal Multigas Detector
Your Rating

Subscribe to our Newsletter

International Enquiry