E
3
Point Gas Monitor Technical Manual
Installation
5
Installation Height
Detected Gas Relative Density Installation Height
(air = 1)
CO Carbon monoxide 0.968 1–1.5 m (3–5 ft.) from floor
H
2
S Hydrogen sulfide 1.19 30 cm (1 ft.) from floor
*NO
2
Nitrogen dioxide 1.58 (cold) 30 cm–1 m (1–3 ft.) from ceiling
O
2
Oxygen 1.43 1–1.5 m (3–5 ft.) from floor
COMB Most combustibles are heavier than air, with the exception of methane,
hydrogen, ethylene and acetylene. Sensors for gases that are heavier
than air should be installed approximately 30 cm (1 ft) from the floor. For
combustibles that are lighter than air, sensors should be installed 30 cm
(1 ft) from the ceiling, close to the potential leak source.
* May differ in certain applications. Hot NO
2
from exhaust systems is lighter than
ambient air.
Wall Mounting for Standalone/Network monitor
1. Verify that power to the monitor is off.
2. While properly grounded for ESD protection, remove the PCBA from the
monitor. It is attached by a single center screw. Carefully place the PCBA
in the enclosed antistatic envelope.
3. Drill two holes through the case and into the mounting surface;
horizontally if mounting on a vertical surface or vertically if mounting to a
standard electrical box as indicated below.
4 3/8 in (11.1 cm)
for mounting on
vertical survaces
3.28 in (8.3 cm)
for mounting on electrical boxes
w ww . . co m
information@itm.com1.800.561.8187
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