Tetra 3

Overview

The Tetra 3 portable multi gas monitor can detect and monitor the four most common gases (carbon monoxide, methane, oxygen and hydrogen sulphide), but also an expanded range: ammonia, ozone, sulphur dioxide, H₂ filtered CO (for steel plants) and IR carbon dioxide (for safe area use only).

Robust

Rugged and impact-resistant design provides extra shock and vibration protection – provides protection in the harshest environment
Water and dust resistant to IP65 and IP67
Can be submerged in water

Effective warning

95dB audible alarm – ensures clear warning facilitating prompt evacuations from hazard zones
Vivid red/blue visual alarm
Vibrating alarm

Reliable

Proven sensor technology and software operation – Provides reliability you can trust and has the power to cover you for an extended shift
Clear “calibration due” warning
Lithium-ion battery provides over 14 hours continuous operation from a single charge with no memory effects

User friendly

Single button operation for all functions – can be operated with gloved hands
Top mounted, backlit display of all gas readings, diagnostics and battery life – ‘at a glance’ operating status

Specifications

Size	114 x 71 x 48mm (tapers to 20mm) (4.5 x 2.8 x 1.9ins)
Weight	295g (10.4oz)
Alarms	95dB multiple alarm sounds allow selection of distinctive tones for different alarm levels Internal vibrating alarm
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. Normal display: Real time gas concentration levels Display recall: Peak readings and TWA
Data logging	Timed: 50 hours at 1-minute data rate (>12,000 data logs of 4 channels) Threshold: Starts after adjustable pre-set level Event: >5,000 events
Event logging	Alarm, over range, calibration, bump, on/off, TWA, 1000 events
Battery	Rechargeable Li-ion battery
Operating time	Based on four-gas instrument fitted with flammable sensor: A 5-hour charge from flat provides at least 12 hours of continuous use.A 12-hour charge provides at least 14 hours of continuous use
Sampling	Diffusion or hand aspirator
Operating temperature	-20°C to +55°C (-4°F to +131°F)
Storage	-25°C to +65°C (-13°F to +149°F)
Humidity	15-95% RH@ 40°C non-condensing
Ingress protection	IP65 and IP67
Approvals	ATEX II 2G Ex ia db IIC T4 Gb (-20°C ≤ Ta ≤ +55°C) BASEEFA05ATEX0187 IECEx Ex db ia IIC T4 Gb (-20°C ≤ Ta ≤ +55°C) BAS05.0059 CSA Class I Division 1 Groups A, B, C and D
Safety standards	EN60079-0, EN60079-11, EN60079-1 CSA22.2, 152 EN50270, EN50271, EN50104, EN45544, EN60079, IEC61508
PC Interface	RS232 connection from interface module in charger RS232/USB converter available
Calibration	Can be routinely calibrated using Portables PC software or Crowcon Checkbox IMH
Accessories	Integral alligator clip Optional accessories: Universal harness plate, shoulder strap, chest harness, aspirator assembly (flow plate, bulb and 2m/6ft tubing), fixed and telescopic sample probes, and an in-line water trap
Charging	Single way drop-in charger with UK, EU or US plug or in-line 110V/220V supply Single way drop-in charger with options as above including PC interface 5 way multi-charger with universal power supply Vehicle adapter for in-vehicle charging Universal charger for vehicle, wall and desk mounting with a multi-region plug (supplied with EU/UK/US/Australian inserts) and status indication
Crowcon Connect Compatible?	Yes

Gases and Ranges

Ranges and alarms vary by country and application; these can be configured as required. Each channel can have two instantaneous alarms. Toxic channels also have TWA alarms. Flammable gas calibration is available for methane, propane, butane, pentane, hydrogen and ethylene as standard.

Gas	Range	Typical Alarms
Flammable	0-100% LEL	20% LEL
Oxygen (O₂)	0-25%	19/23.5% volume
Hydrogen Sulphide (H₂S)	0-100ppm	5ppm
Carbon Monoxide (CO)	1-500ppm	30ppm
Sulphur Dioxide (SO₂)	0-20ppm	1ppm
Ozone (O₃)	0-1ppm	0.1ppm
Ammonia (NH₂)	0-100ppm	25ppm
*Carbon Dioxide (CO₂)	0-5%	0.5 % volume
Carbon Monoxide (CO) H₂ compensated	0-500ppm	30ppm
Hydrogen Cyanide (HCN)	0-30ppm	10ppm

* T3 is available in a safe area CO2 version offering 0-5% carbon dioxide measurement.

The CO2 sensor replaces the flammable option and can be supplied with oxygen and toxic sensors.

Accessories

Below is a small selection of the accessories available for the Tetra 3.

T3 universal charger

C011149

Wall, desk or vehicle storage compartment mounting, holds T3 firmly for charging. With multiregion mains PSU (UK, EU, NA and Australian plugs included).

T3 Gas Tester

Wall mount gas test solution for CH4, O2, CO, H2S & CO2 configured T3s

Charger Interface Software and Communication Kit

C011306

Charger interface kit enables data download, calibration and instrument configuration. Includes multi-region power supply, single way charger/interface cradle, USB-RS232 adaptor and RS232 cable. Software CD available separately (C01832).