GM35 Operating Instructions
Probe Model
Product overview
10 © SICK MAIHAK GmbH • Germany · All rights reserved 8009389/07-2006
2.1.2 Overview of the GM35 Components
Fig. 1 GM35 system overview
• Sender/receiver unit (SR unit)
The SR unit contains the main optical and electronic modules in the measuring system.
The gas concentrations of CO, CO
2
and H
2
O are recorded here and the mean value cal-
culated. Depending on the analyzer versions these components can be detected as sin-
gle measurements as well as simultaneous measurements
• Measuring probe
The measuring probe is available as an open design with integrated purge-air guidance
system, as well as with a gas-permeable diaphragm that does not require purge air (GPP
= Gas permeable probe). Both versions are described on page 12.
• Purge air unit
To provide the purge air supply for the SR unit, with the measurimg probe, therefore, pro-
tect the device against contamination and high gas temperatures. Depending on the ap-
plication, 1 or 2 units are required.
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SLV4 purge air unit
(only for GMP probe)
Sender/receiver unit
(SR unit) with GMP probe
Temperature
sensor
Evaluation unit
EVU
CAN bus
CAN
PROFIBUS
Inputs, outputs
analog,, digital
Interfaces to
peripherals:
• host
• sensors
• meas. data pro-
cessing
• Status signals
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