Chapter 1 | Overview
Overview of the Gas Monitor
The fixed gas monitor is an
independent monitor capable of
displaying one or two gas
concentrations as well as sensor or
instrument specific diagnostics.
The comes standard with
independent 4-20 mA outputs for
each channel, making it ideal for
interfacing to control units. A digital
ModBus RTU interface is also
available, allowing the to
interface to digital control systems.
The is available with an
optional relay board, allowing the
unit to directly control external
devices such as fans, pumps, alarm
horns, or warning lights. Two of the
relays can be programmed for alarm
activation, while the third relay is a
fault protection relay. Calibration,
changing span gas concentration,
and checking the instrument’s
configuration are easily
accomplished using the non-
intrusive magnetic wand.
The is powered with a 24
VDC (12-28 VDC) power supply and
provides a 4-20 mA control signal
for each sensor.
Figure 1-1 Typical Gas Monitor
with Single Gas Sensor (Stainless Steel
Option)
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