Weight: 498g (1.1lb)

Dimensions: 122x128x57mm (43/4 x5x21/2 inches) rechargeable. 134x128x57mm (51/4 x5x21/2 inches) nonrechargeable

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.

Typical response times: Flammable 20 s, Toxic gas 20 s, Oxygen 10s

Audible Alarms: 94dBA @ 30cm (1ft). Multiple alarm sounds allow selection of distinctive tones for different alarm levels

Visible Alarms: Dual colour red/blue flashing LED pair in gas hazard

Vibrating Alarm: Internal vibrating alarm

Display: 128x64 graphic LCD with backlight, giving simultaneous display for all gas channels. Graphic symbols for battery (with proportional indication of remaining operation time), pump operation, healthy operation or fault warning. Start up indication when calibration is due within 30 days, calibration overdue, or service required.

Display Mode: Normal display for real time gas concentration levels. Display recall for Peak readings and TWA

Datalogging: Timed datalogging: 50 hours at 1-minute data rate Event logging: >1500 events

Battery Types: Rechargable Li-ion battery. Non rechargeable pack 3xAA Alkaline cells

Operating time: Based on pumped four gas unit with flammable sensor - Rechargeable 12 hours minimum, Non-rechargeable 11 hours minimum

Sampling: Hand aspirator or internal electric sampling pump

Operating temp. range: -20oC to +55oC (-4oF to +131oF)

Humidity: 0-99% RH

Ingress Protection: IP65

Approval Codes - Europe: ATEX II 2G EEx iad IIC T4 (Tamb -20oC to +55oC) BASEEFA 03ATEX0193

Approval Codes - USA: UL/cUL Class I Division 1 Groups A, B, C, D.

Safety Standards - Europe: EN50014, EN50020, EN50018, 94/9/EC

Safety Standards - USA & Canada: UL913, CSA22.2, 152

Operation Standards: EN50270, EN50271, IEC61508, EN61779

PC Interface: IR link for RS232 connection. USB/RS232 Converter available. Portables PC software package provides full configuration control, calibration and access to the Data and Event files.

Autocalibrator: Tetra can be routinely calibrated using the Castle Autocalibrator II in conjunction with the Portables PC software.

Accessories: Tetra is supplied with an integral belt/pocket clip. Pumped units are supplied with a sampling kit (flowplate and 2m(6ft) tubing)

Plug in charging power supplies are available in UK, European or US style. In line versions for 110V or 230V AC have flying lead for fitment of suitable mains plug. A vehicle lighter socket charger is available. Optional accessories include: universal harness plate, shoulder strap, chest harness, carry case, aspirator assembly (flow plate bulb and 2m/6ft tubing), fixed and telescopic sample probes, and an in-line water trap.