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Chapter 2. Installation
2.6 Sensor Installation
This section provides installation details for the GE Measurement & Control line of chilled-mirror humidity sensors.
2.6.1 Model 1111H Sensor
The Model 1111H is an open-type sensor (see Figure 19 below). It can be threaded into standard pipe fittings or
mounted in a type 0111D pressure boss, which encloses it and adapts it for ¼-inch compression fittings. When
installing the sensor in the pressure boss, remove the black aluminum sensor cover.
For maximum thermal conductivity, the base of the Model 0111D pressure boss should be coated with heat-conducting
grease. When so installed on a surface suitable for dissipating heat, the sensor will achieve its maximum rated
depression. See the Chilled Mirror Sensor Comparison Chart in Appendix D. "Chilled Mirror Sensors".
Figure 19: Model 1111H Sensor
2.6.2 Model D-2 Sensor
The Model D-2 is a general purpose, two-stage sensor with 65°C (117°F) of depression capability. It features wetted
parts of stainless steel and glass, for durability in demanding industrial applications. The Model D-2 can be used as a
benchtop sensor, mounted to a heat sink, or mounted to a cooling fan for maximum operating range. Advanced features
include field-replaceable optics and cooler assemblies, and auxiliary visible light optics with a viewing window for
inspecting the mirror during operation (see Figure 20 below).
For maximum thermal conductivity, the base of the Model D-2 sensor should be coated with heat-conducting grease.
When so installed on a surface suitable for dissipating heat, the sensor will achieve its maximum rated depression. See
the Chilled Mirror Sensor Comparison Chart in Appendix D. "Chilled Mirror Sensors".
Figure 20: Model D-2 Sensor
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