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Crowcon Tetra T4 Multi Gas Detector

Code: T4-HOCA-XX-CRD
  • Four Gas Version LEL, O2, CO & H2S
  • Supplied with a cradle charger
  • 3-year life Oxygen sensor

£354.00

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The Crowcon Tetra-T4 is a portable detector for up to four gases. Flammable gas, oxygen depletion, carbon monoxide and hydrogen sulphide can all be monitored simultaneously. Three or two gas models are also available. The combustible sensor targeting methane has enhanced sensitivity for pentane, hexane and other long-chain hydrocarbons.

A unique Tetra 4 feature is the TWA resume button, where the long-term exposure limit of a worker is calculated over eight hours. By pressing the resume button, the detector will continue calculating the time weight average over the entire eight-hour shift period, including the time before switching off. With other detectors switching off and on again assumes the start of a new shift, potentially underestimating exposure. Battery life is 18 hours, enabling multiple shifts or extended shifts without recharging.

Designed to be tough, drop-tested on concrete to 4 metres. Operation is by a single button, use is possible wearing gloves, and an intuitive menu system makes the T4 simple. Visual monitor status is indicated to all by LEDs. Green indicates working correctly and red/blue for alarm or action needed. T4 also includes 95dB audible and vibrating alarms permitting use in noisy environments.

Measuring ranges

  • Oxygen (O2): 0-30% vol, resolution 0.1% vol
  • Flammable 0-100% LEL, resolution 1% LEL
  • Hydrogen Sulphide (H2S) 0-100ppm, resolution 1ppm
  • Carbon Monoxide (CO) 0-1000ppm, resolution 1ppm

Features

  • Suitable for harsh environments
  • Optional clip-on filter cover protects sensors from dirt
  • Rubber shockproof casing
  • Ingress IP65 Dust/water jets and IP67 withstanding short-term water immersion
  • Dedicated sensors for each gas – no dual tox
  • Backlight display, the view can be rotated 180° according to preference
  • Datalogging 130 hours based on 10-second intervals. Events 3500
  • Warranty two years upgradeable to three
  • Approvals: ATEX, IECEx and UL
  • Size:135 x 80 x 35mm (5.3 x 3.1 x 1.4in). Weight 282g (9.9oz)

T4 supplied with; Rubber boot, alligator clip for donning, quick start guide, bump/calibration cap, calibration certificate and declaration of conformity. None kit versions require a charger – purchase separately. Norrscope stocks standard four gas configurations for fast delivery.

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Title Size
Tetra T4-datasheet 240 KB
Tetra T4_Manual 3 MB

Additional information

Weight 0.190 kg

Ordering Information

T4 Main Unit  
Product Code Description
Standard Configuration
T4-HOCA 4 gas – H2S, O2, CO,CH4 % LEL
T4-ZOCA 3 gas – O2, CO,CH4 % LEL
T4-HOZA 3 gas – H2S, O2, CH4 % LEL
T4-ZOZA 2 gas – O2,CH4 % LEL
T4-ZOCZ 2 gas – O2,CO
T4-HOCA-H2 4 gas – H2S, O2, CO (H2 resistant),CH4 % LEL
T4-ZOCA-H2 3 gas – O2, CO (H2 resistant),CH4 % LEL
Order charger separately
T4-EW3 Extend warranty to 3 years. Includes sensors & battery. Add this code as a second line on the order.
Alternate alarm levels / certifications
T4-HOCA-XX 4 gas – H2S, O2, CO,CH4 % LEL
T4-ZOCA-XX 3 gas – O2, CO,CH4 % LEL
T4-HOZA-XX 3 gas – H2S, O2, CH4 % LEL
T4-ZOZA-XX 2 gas – O2,CH4 % LEL
T4-ZOCZ-XX 2 gas – O2,CO
T4-HOCA-H2-XX 4 gas – H2S, O2, CO (H2 resistant),CH4 % LEL
T4-ZOCA-H2-XX 3 gas – O2, CO (H2 resistant),CH4 % LEL
T4-EW3 Extend warranty to 3 years. Includes sensors & battery. Add this code as a second line on the order.
Including cradle charger
T4-HOCA-XX-CRD 4 gas – H2S, O2, CO,CH4 % LEL
T4-ZOCA-XX-CRD 3 gas – O2, CO,CH4 % LEL
T4-HOZA-XX-CRD 3 gas – H2S, O2, CH4 % LEL
T4-ZOZA-XX-CRD 2 gas – O2,CH4 % LEL
T4-ZOCZ-XX-CRD 2 gas – O2,CO
T4-HOCA-H2-XX-CRD 4 gas – H2S, O2, CO (H2 resistant),CH4 % LEL
T4-ZOCA-H2-XX-CRD 3 gas – O2, CO (H2 resistant),CH4 % LEL
T4-EW3 Extend warranty to 3 years. Includes sensors & battery. Add this code as a second line on the order.
Where XX is region/approval (See above) ATEX, IECEx, UL
Region/ Approval Approval  
(standard) O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm
S2 O2: 19.0/23.5%, CH4: 10/20%, CO: 30/100 ppm, H2S: 5/10 ppm
DE O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm
ES O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm
FR O2: 19.0/23%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm
IT O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm
NL O2: 19.0/23.5%, CH4: 10/40%, CO: 25/50 ppm, H2S: 1.6/5 ppm
PL O2: 19.0/23%, CH4: 20/40%, CO: 20/100 ppm, H2S: 5/10 ppm
SG O2: 19.5/23.5%, CH4: 10/40%, CO: 25/100 ppm, H2S: 10/15 ppm
US O2: 19.5/23.5%, CH4: 10/20%, CO: 35/50 ppm, H2S: 10/15 ppm
BR (INMETRO) O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm
T4 bundles  
Product Code Description
T4-HOCA-10 10 x 4 gas – H2S, O2, CO,CH4 % LEL
Includes 10 way charger
T4-ZOCA-10 10 x 3 gas – O2, CO,CH4 % LEL
Includes 10 way charger
T4-HOZA-10 10 x 3 gas – H2S, O2, CH4 % LEL
Includes 10 way charger
T4-ZOZA-10 10 x 2 gas – O2,CH4 % LEL
Includes 10 way charger
T4-HOCA-H2-10 10 x 4 gas – H2S, O2, CO (H2 Resistant),CH4 % LEL
Includes 10 way charger
T4-ZOCA-H2-10 10 x 3 gas – O2, CO (H2 Resistant),CH4 % LEL
Includes 10 way charger
T4 Chargers  
T4 main unit does not include a charger
Product Code Description
T4-CRD T4 Cradle charger and multi region power supply
T4-TWC T4 10 way charger and multi region power supply – available only for ATEX/IECEX regions
Includes Europe, UK
T4-VHL T4 vehicle charger and vehicle charging adaptor
Inmetro certified
T4-VHL-BR T4 vehicle charger – Inmetro
Includes vehicle charging adaptor
T4 Accessories  
Charging & comms cables
Product Code Description
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
T4 Accessories  
Charging & comms cables – Inmetro certified
Product Code Description
CH0203 USB communications lead (not powered) – Inmetro
CH0204 USB communication and power lead – Inmetro
Sensor filter plates
T4-EXT-F T4 external filter plate
T4-EXT-F-10 T4 external filter plate pack of 10
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)
C01097 1m sample probe
C01757 Telescopic aspirator probe
M04032/X Aspirator hose – per metre
when ordering replace the X with 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 35, 40, 60, 70 or 100  for the length
T4 Accessories  
Bump / calibration accessories
Product Code Description
T4-CAL-CAP Replacement bump and calibration cap for T4
G4-QUAD-1-112 112 Litre – 15 ppm H2S, 100ppm CO, 2.2 %vol CH4, 18% O2 in nitrogen
C03052 Fixed flow regulator with on/off switch
T4 I-Test  
Product Code Description
IT-T4-11Z-ZB-1 I-Test 1 x gas inlet and T4 Module for ATEX Regional Settings (CH4 set to 2.2%)
IT-T4-11Z-ZB-2 I-Test 1 x gas inlet and T4 Module for UL Regional Settings
(CH4 set to 2.5%)
IT-T4-11Z-ZB-3 I-Test 1 x gas inlet and T4 Module for Inmtero Regional Settings (CH4 set to 2.2%)
I-Test Accessories
C03332 Demand flow regulator, 1-3 litre/min
AC0510 Cylinder holder (wall mount) for 34L to 112L cylinders
T4 Spares
Product Code Description
SS0112 0-100% LEL (T4 Type 2)
SS0501 0-30% Oxygen (3 Year) (See Common Spares tab for pricing)
SS0301 Carbon monoxide 0-1000 ppm (T4) 0-2000ppm or 0-500ppm (H2S & SO2 filtered) (Gas-Pro) (See Common Spares tab for pricing)
SS0302 Carbon monoxide 0-1000 ppm (T4) 0-2000ppm (Gas-Pro)   (H2 filtered) (See Common Spares tab for pricing)
SS0303 Hydrogen sulphide 0-100 ppm (See Common Spares tab for pricing)
M040003 Sensor Blank
T4-PCB-M T4 main board
T4-PCB-S T4 sensor board & sensor insulator
T4-SCR-20 T4 case screws, pack of 20
T4-LCD T4 LCD screen & shock gasket
T4-FRC-O T4 orange front case with Crowcon bubble label
T4-BKC-OC T4 orange back case with alligator clip and ATEX/IECEx/UL certification Label (Type 2)
Serial number needed with order (other wise order as T4-BKC-OC-X)
T4-BKC-OC/U T4 orange back case with alligator clip and ATEX/IECEx MED certification label (Type 2)
Serial number needed with order (other wise order as T4-BKC-OC-X/U)
T4-BKC-OD T4 orange back case with alligator clip and Inmetro certification label (Type 2)
Serial number needed with order (other wise order as T4-BKC-OD-X)
S012342 T4 battery
M050091 T4 Crowcon branded label
M040166 T4 one piece sensor gasket
M040167 T4 display gasket
T4-AGC T4 alligator clip + screw
M040168 T4 sensor insulator
M05152 T4 Certification label
Specify serial number on order.
M048521 Adhesive flow plate gasket for I-Test (T4)

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