Siemens 535-490-24 : Duct Temperature Sensor, 4 to 20 mA, Averaging Sensor, 24 inches (rigid) Probe, 20°F to 120°F (-7°C to 49°C)
The Siemens 535-490-24 duct temperature sensor monitors and transmits changes in duct air temperature to your HVAC control system for accurate, reliable temperature measurement. This averaging sensor uses a 4 to 20 mA element with a 24 inches (rigid) probe. Measuring range is 20°F to 120°F (-7°C to 49°C). Accuracy is ±0.54°F (±0.3°C) @ 32°F (0°C).
Specifications:
| Output Signal | 4 to 20 mA |
| Sensor Type | Averaging |
| Probe Length | 24 inches (rigid) |
| Measuring Range | 20°F to 120°F (-7°C to 49°C) |
| Accuracy | ±0.54°F (±0.3°C) @ 32°F (0°C) |
| Probe Material | 0.028 wall SAE J526 ZTEW or Galfan steel tubing |
| Housing | Standard NEC approved 2x4 inch electrical conduit box with 1/2-inch (13 mm) knockouts |
| Screw Head Type | Standard slotted |
Datasheets
 | Siemens Duct Point Temperature Sensors Technical Specific |
| Duct Temperature Sensor Installation |
- Sensor Type:
- Averaging
- Averaging Type:
- Rigid Steel
- Temperature Element:
- Transmitter
- Probe Length:
- 24 Inch
- Enclosure:
- Galvanized Steel Enclosure
