Product Overview

Technical Specification Sheet
Document No. 149-919
August 26, 2009
Siemens Building Technologies, Inc. Page 1 of 2
Immersion Well Temperature Sensors
Description
The Immersion Well Temperature Sensors monitor
and transmit changes in temperature to the building
control system. Specific devices within the range are
compatible with whatever North American
manufactured building automation system you may be
installing. They thread into a well in a pipe and sense
the medium temperature in the pipe. All sensors
incorporate precision temperature sensing elements to
accurately and reliably measure temperature.
Features
• Variety of sensing elements
• Suitable for hot or chilled medium
• Responsive to temperature change
• Accurate and reliable indication of temperature
• Familiar installation requires no special tools
Figure 1. Immersion Well Temperature Sensor.
Specifications
Temperature Range Controller dependent
Output Signals Changing resistance
Sensing Element Type
NTC Thermistor, Platinum
RTD, or Nickel RTD
Accuracy
NTC Thermistors,
mid-range
±1.0°F (±0.5°C)
Pt RTD and Ni RTD,
mid-range
±0.75°F (±0.4°C)
Installation
Wiring
2-conductor: 18 to 22 AWG
twisted pair (per code
requirements)
Calibration Adjustments NTC: None required
RTD: Adjust for increased
temperature offset (a
constant) as required,
related to added resistance
of the field wiring
External Installation Threads 1/2-inch – 14 NPT
Conduit Connection Threads 1/2-inch – 14 NPSMI
Housing Material
Immersion Well Material
Cast zinc
300 Series Stainless Steel