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T3 Multi Gas Detector

T3 personal portable gas detector from Crowcon features one button operation, simple even with a gloved hand and is rugged and weather proof, suitable for today’s arduous industrial environments.

For best pricing, please call 1-800-952-3293 or email



T3 Multi Gas Detector is designed with the user in mind, the top mount display, full function data and event logs, audible, visual and vibrating alarms deliver top end performance in a small and lightweight package. Gases include the most common 4 (carbon monoxide, hydrogen sulfide, oxygen and flammables) plus ammonia, ozone, sulfur dioxide, hydrogen filtered carbon monoxide, hydrogen cyanide, other flammable gases and IR carbon dioxide (for safe areas only)

Other ranges and alarm levels are available on request. Each gas channel can have two instantaneous alarm levels set, Toxic channels also have Time Weighted Average alarms. Flammable gas calibration is available for methane, propane, butane, pentane, hydrogen and ethylene as standard.


  • Rugged impact resistant design provides extra shock and vibration protection
  • Water and dust resistant to IP65 and IP67
  • Can be submerged in water
  • 95 dB audible alarm ensures clear warning
  • Vivid red/blue visual alarm and vibrating alarm
  • Proven sensor technology and software operation
  • Clear calibration due warning
  • Li-Ion battery provides 14 hours continuous operation from a single charge with no memory effects
  • Single button operation for all functions-which can be operated with gloves
  • Top mounted, backlit display of all gas readings, diagnostics and battery life


Audible Alarms 95 dBA, multiple alarm sounds allow selection of distinctive tones for different alarm levels
Visual Alarms Dual color red/blue flashing LED pair in gas hazard
Vibrating Alarm Internal
Display Graphic LCD with backlight, giving simultaneous display for all gas channels. Graphic symbols for battery (with proportional indication of remaining operation time), healthy operation or fault warning. Start up indication when calibration is due, overdue or service required
Display Mode Normal display for continuous real time gas concentration levels
Display recall for Peak readings and TWA
Datalogging Timed datalogging: 50 hours at 1 minute intervals data rate, 12,000 records, threshold logging starts after adjustable preset level, event logging > 5,000 events
Battery Type Rechargeable Li-Ion battery
Operating Time Rechargeable: 14 hours with a 12 hour charge
Sampling Diffusion or hand aspirator
Temperature Range -4 to 131°F
Humidity 15-95% RH
PC Interface RS232 connection from interface module in charger, RS232/USB converter available
Ingress Protection IP65 and IP67
Approvals Class I, Div I, Groups A, B, C, D
Calibration Can be routinely calibrated using Portables PC
Weight 10.4 ounces
Dimensions 4.5″ x 2.8″ x 1.9″

Sensor Specifications

Carbon Monoxide
0-500 ppm
30 ppm
0-100% LEL
20% LEL
Hydrogen Sulfide
0-100 ppm
5 ppm
0-25% Vol
19.5% (low), 23.5% (high)
Sulfur Dioxide 0-20 ppm 1 ppm
Ozone 0-1 ppm 0.1 ppm
Ammonia 0-100 ppm 25 ppm
Carbon Dioxide* 0-5% 0.5%
Dual Toxic Carbon Monoxide/Hydrogen Sulfide  CO: 0-500 ppm, H2S: 0-100 ppm  CO: 30 ppm, H2S: 5 ppm
Carbon Monoxide H2 Filtered 0-500 ppm 30 ppm
Hydrogen Cyanide 0-30 ppm 10 ppm

*The Tetra 3 is available in a safe area Carbon Dioxide version offering 0-5% CO2 measurement. The CO2 sensor replaces the flammable option and can be supplied with oxygen and toxic sensors. Not intrinsically safe.

Ordering Information

The Tetra 3 multi gas detector is supplied with an integral belt/pocket clip. For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email

Catalog No.
T3 Multi Gas Detector with LEL, O2, CO, H2S sensors, requires charger
T3 Charger


T3 Multi Gas Detector literature

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