Product Overview

Technical Specification Sheet
Document No. 149-915
August 26, 2009
Siemens Building Technologies, Inc. Page 1 of 2
Duct Point Temperature Sensors
Description
The Duct Point Temperature Sensors monitor and
transmit changes in duct air 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 provide accurate, reliable indication of
duct temperature. The sensor resistance varies
proportionally to the actual duct air temperature being
measured. They are well suited for application such as
heating and cooling, morning warm-up/cool-down, and
monitoring discharge air temperature.
Features
• Variety of sensing elements.
• Suitable for multiple duct applications.
• Responsive to temperature change.
• Accurate and reliable indication of duct
temperature.
• Familiar installation requires no special tools.
Figure 1. Duct Point Temperature Sensors.
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
Dimensions:
Probe Lengths
4 in. (10 cm), 8 in. (20 cm),
or 18 in. (45 cm)
Mounting
2 × 4 inch (5 × 10 cm)
electrical conduit box
Probe Material
0.028 Wall SAE J526 ZTEW
or Galfan steel tubing
Housing
Standard NEC approved
2 × 4 inch (5 × 10 cm) utility
box with 1/2 inch (13 mm)
knockouts
Cover Plate
Standard NEC approved
2 × 4 inch (5 × 10 cm) utility
box cover
Screw Head Type Standard slotted