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8009441/YN36/V3-0/2015-08| SICKOPERATING INSTRUCTIONS|GM35
Subject to change without notice
PRODUCT OVERVIEW
2.1.2 Overview of standard components
Fig. 1: GM35 system overview
• Sender/receiver unit (SR-unit)
Contains the main optical and electronic subassemblies of the measuring system. The
gas concentration is recorded here and the measured value determined. Components
CO or N
2
O, CO
2
and H
2
O are measured, both singly and simultaneously in combinations.
• Measurement reflector
Version with a gold-plated hollow triple for the following distances (flange on SR side to
flange on reflector side):
0.5 to 1 m, 1 to 2.3 m, 2.3 to 4 m, 4 to 6 m, > 10 m
• 2 purge air units
Provide purge air for the SR-unit and the reflector and therefore protect against
contamination and high gas temperatures. The blower types for the SR-unit resp.
reflector are designed differently depending on the application.
• Purge air fixtures for the SR-unit and reflector
To fit the SR-unit and reflector on the mounting flanges. These include the purge air
connections to connect the purge air hoses from the purge air unit and sockets for the
connection cable as well as to connect external sensors (purge air unit filter monitor,
temperature sensor PT1000, on the SR side)
• Evaluation unit
The evaluation unit in the GM35 measuring system serves as user interface and
prepares and outputs the measured values and performs control and monitoring
functions. The EvU can be installed near the SR-unit; if necessary, however, it can also
be installed up to 1000 m from the measuring point, e.g. in a central control/monitoring
room in an industrial plant.
The evaluation unit carries out the following tasks, for example:
Sender/receiver unit
(SR-unit)
Reflector
Purge air fixture
SR-unit
Purge air fixture
for reflector
Purge air unit SLV4 SR-unit
Purge air unit SLV4
Reflector
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