17
8009389/YN39/V3-0/2015-08| SICK OPERATING INSTRUCTIONS|GM35
Subject to change without notice
PRODUCT OVERVIEW
Measuring probe GMP (open probe) GPP (dry)
Version
Measuring path open in flow
direction; purge air guidance
with outlet aligned 90° to
gas flow
Gas diffusion probe with
ceramic filter, for dry
sample gas
Max. gas temperature
430 °C
[1]
N
2
0 measurement up to
180 °C
[1] The maximum temperature used for the measurement depends on the application.
430 °C
N
2
0 measurement up to
180 °C
Gas check according to EPA
specification possible
–Yes
Purge air supply required Yes –
Heating on optical interfaces
in the probe
– Yes, with integrated control
Flow rate of sample gas 1...40 m/s < 40 m/s
Suitable for wet sample gas Yes –
Maximum duct pressure
±120 hPa, depending on
purge air supply
±120 hPa
Measurable components
[2]
[2] Probes are fitted with gold-plated hollow triples when CO or N20 is measured as component or with other
components, otherwise probes with quartz glass are used.
CO or N
2
0, CO
2
, H
2
OCO or N
2
0, CO
2
, H
2
O
System-response time (T
90
) ≥ 5s ≥ 120 s
Duct diameter
[3]
[3] Probes with shorter active measuring paths are available on request (may be required for higher concentrations
or smaller duct diameters)
> 360 mm > 300 mm
Dust concentration < 2 g/m
3
act < 30 g/m
3
act
Probe lengths available [m] 1.0/1.5/2.0/2.5 1.0/1.5/2.0
Active measuring paths
available [mm]
**
250/500/750/1000/1250 250/500/750/1000
Table 1: Comparison Table for GM35 measuring probes (dimension
drawings,
see page 128)
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