Tetra Personal Multigas Monitor with optional internal pump
Tetra is a flexible multigas monitor for the detection of flammable gases, oxygen and a wide range of toxic gases. Available in rechargeable or disposable battery format and with or without an internal pump, it is used extensively in the utilities, chemicals and hydrocarbon processing markets.
Intrinsically safe, Tetra is one of the only portable gas detectors with embedded software designed to the exacting requirements of IEC 61508-3, guaranteeing reliable and dependable operation.
- Up to four gases measured
- Infra-red carbon dioxide sensor version for safe area use (ie non-explosion risk areas)
- Digital interchangeable i-module sensors for full flexibility
- Loud 94dBA audible alarm with selectable tones
- Unique dual colour red/blue visual alarm
- Built in vibrating alarm as standard
- Rugged and robust, IP65 ingress protection
- Simultaneous 4 gas display with automatic backlight
- Peak mode operation
- TWA reading recall
- Data & event logging
- Simple IR interface to PC
| Size | Rechargeable 122 x 128 x 57mm (4.75 x 5 x 2.25 ins) Non-rechargeable 134 x 128 x 57mm (5.25 x 5 x 2.25 ins) |
| Weight | 498g (1.1lb) |
| Alarms | 94dB Multiple alarm sounds allow selection of distinctive tones for different alarm levels |
| 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 |
| Data logging | Timed: 50 hr 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-hr charge from flat provides at least 12 hr of continuous use. A 12-hr 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 | 20 to 90% RH@ 40°C non-condensing |
| Ingress protection | IP65 and IP67 |
| Approvals | ATEX II 2 G Ex ia d IIC T4 Gb (-20°C ≤ Ta ≤ +55°C) BASEEFA05ATEX0187 IECEx Ex ia d 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, 94/9/EC 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 |
| 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 |
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% |
| Oxygen | 0-25% | 19/23.5% |
| Hydrogen sulphide (H2S) | 0-100ppm | 5ppm |
| Carbon monoxide (CO) | 1-500ppm | 30ppm |
| Sulpher dioxide (SO2) | 0-20ppm | 1ppm |
| Ozone (O3) | 0-1ppm | 0.1ppm |
| Ammonia (NH3) | 0-100ppm | 25ppm |
| **Carbon dioxide (CO2) | 0-5% | 0.5ppm |
** 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