Introduction Tetra 3
I.
Introduction
Thank you for purchasing the new Tetra 3 Personal Multigas Monitor. Tetra 3 is
a portable multigas detector, designed to be carried or worn by individuals
working in hazardous environments such as confined spaces. It is suitable for
use in Zone 1 and 2 hazardous areas. Tetra 3 can monitor up to four different
gases and display the readings simultaneously on a display screen. Alarm warn-
ings are given through a combination of a loud audible alarm, a bright visual
alarm of blue/red flashing LEDs and an internal vibrator. Tetra 3 is fitted with
modular, plug and play gas sensors. Each sensor carries an intelligent processor
which contains calibration and sensor information.
Tetra 3 is operated using a Lithium-ion rechargeable battery. A charger is avail-
able with a range of options.
At Crowcon we recognised the need for a reliable and robust personal moni-
toring system, which is both lightweight, compact, easy to use and cost effec-
tive. Tetra 3 has a single operator button, and an intelligent user-friendly display
with backlight. Gas levels are continuously monitored providing normal gas
readings, peak readings and time weighted averages (TWA). Tetra 3 is a diffu-
sion sampling instrument with an option to use a hand-operated aspirator.
Configuration and data/event logging is handled by Crowcon Portables PC soft-
ware, the PC communication link being provided through the charger.
Tetra 3’s shape and design makes it comfortable to wear and as non-intrusive
as possible, with a non-slip grip for better handling. Extra accessories, such as
shoulder strap and chest harness, can be purchased.
Tetra 3 has been designed from top to bottom to bring you ease of use, low
maintenance and extremely high reliability. Through an innovative and rigorous
design process, we have combined several features from our reliable Tetra and
Gasman products to produce the new Tetra 3.
i-module gas sensor
Tetra 3 uses unique plug and play i-module sensor technology. Each sensor unit
incorporates its own intelligent processor holding sensor configuration and cal-
ibration data. Different sensor modules can be purchased, and once inserted,
are immediately ready to run. Tetra 3 can operate with up to three sensors and
display simultaneously, information and gas readings, for all the sensors, on
one screen. This means no redundancy and assured future investment in your
Tetra 3 unit, allowing you to swap sensors between units or configure your unit,
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