
Siemens Building Technology 540-660B Sensor
The Siemens 540-660B Sensor is a staple 10K Ohm NTC thermistor designed for precision environmental monitoring in commercial HVAC applications. Engineered for seamless integration with Siemens Terminal Equipment Controllers (TEC) and LONMARK compliant systems, this Type II NTC thermistor offers a reliable sensing range from 55°F to 95°F. As a veteran-grade wall mount room temperature sensor, it features an integrated set point slide and a flush-mounted override button, allowing for local zone adjustments without compromising system-wide logic. The Siemens Series 1000 architecture ensures long-term stability and accurate signal feedback to the building automation system, minimizing the "hunting" common in lower-grade sensors. Housed in a durable white plastic enclosure (3-11/32" H x 2-1/2" W), this OEM replacement HVAC sensor utilizes a 10k ohm resistance curve to provide the high-resolution data necessary for maintaining tight temperature tolerances in VAV terminal boxes and fan coil units. Its tool-free termination block simplifies field installation and diagnostic testing for contractors.
Key Benefits
- Broad Compatibility: Native support for Siemens Building Technology TEC and LTEC controllers ensures plug-and-play replacement.
- High Accuracy: Utilizes a 10K Ohm Type II NTC thermistor for precise resistance-to-temperature conversion and reduced signal drift.
- Local Control Features: Includes a high-accuracy set point slide and a manual override for immediate occupant comfort adjustments.
- Streamlined Installation: Features an unpluggable termination block that minimizes wiring errors and speeds up field service.
- Industrial Durability: The Series 1000 design is maintenance-free and built to withstand rigorous commercial environments.
Common Questions
- Is this sensor compatible with non-Siemens controllers? While designed primarily for Siemens TEC systems, it can function with any controller that accepts a standard 10K-2 NTC input curve.
- How do I test if the thermistor is failing? Use a digital multimeter to measure the resistance across the sensing terminals; at 77°F (25°C), the sensor should read approximately 10,000 ohms.
- Does this model support humidity sensing? No, the 540-660B is a dedicated room temperature sensor; for humidity, a different Series 1000 or 2000 model is required.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $251.82
-65%$251.82
$88.14Siemens Building Technology 540-660B Sensor
The Siemens 540-660B Sensor is a staple 10K Ohm NTC thermistor designed for precision environmental monitoring in commercial HVAC applications. Engineered for seamless integration with Siemens Terminal Equipment Controllers (TEC) and LONMARK compliant systems, this Type II NTC thermistor offers a reliable sensing range from 55°F to 95°F. As a veteran-grade wall mount room temperature sensor, it features an integrated set point slide and a flush-mounted override button, allowing for local zone adjustments without compromising system-wide logic. The Siemens Series 1000 architecture ensures long-term stability and accurate signal feedback to the building automation system, minimizing the "hunting" common in lower-grade sensors. Housed in a durable white plastic enclosure (3-11/32" H x 2-1/2" W), this OEM replacement HVAC sensor utilizes a 10k ohm resistance curve to provide the high-resolution data necessary for maintaining tight temperature tolerances in VAV terminal boxes and fan coil units. Its tool-free termination block simplifies field installation and diagnostic testing for contractors.
Key Benefits
- Broad Compatibility: Native support for Siemens Building Technology TEC and LTEC controllers ensures plug-and-play replacement.
- High Accuracy: Utilizes a 10K Ohm Type II NTC thermistor for precise resistance-to-temperature conversion and reduced signal drift.
- Local Control Features: Includes a high-accuracy set point slide and a manual override for immediate occupant comfort adjustments.
- Streamlined Installation: Features an unpluggable termination block that minimizes wiring errors and speeds up field service.
- Industrial Durability: The Series 1000 design is maintenance-free and built to withstand rigorous commercial environments.
Common Questions
- Is this sensor compatible with non-Siemens controllers? While designed primarily for Siemens TEC systems, it can function with any controller that accepts a standard 10K-2 NTC input curve.
- How do I test if the thermistor is failing? Use a digital multimeter to measure the resistance across the sensing terminals; at 77°F (25°C), the sensor should read approximately 10,000 ohms.
- Does this model support humidity sensing? No, the 540-660B is a dedicated room temperature sensor; for humidity, a different Series 1000 or 2000 model is required.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Description
The Siemens 540-660B Sensor is a staple 10K Ohm NTC thermistor designed for precision environmental monitoring in commercial HVAC applications. Engineered for seamless integration with Siemens Terminal Equipment Controllers (TEC) and LONMARK compliant systems, this Type II NTC thermistor offers a reliable sensing range from 55°F to 95°F. As a veteran-grade wall mount room temperature sensor, it features an integrated set point slide and a flush-mounted override button, allowing for local zone adjustments without compromising system-wide logic. The Siemens Series 1000 architecture ensures long-term stability and accurate signal feedback to the building automation system, minimizing the "hunting" common in lower-grade sensors. Housed in a durable white plastic enclosure (3-11/32" H x 2-1/2" W), this OEM replacement HVAC sensor utilizes a 10k ohm resistance curve to provide the high-resolution data necessary for maintaining tight temperature tolerances in VAV terminal boxes and fan coil units. Its tool-free termination block simplifies field installation and diagnostic testing for contractors.
Key Benefits
- Broad Compatibility: Native support for Siemens Building Technology TEC and LTEC controllers ensures plug-and-play replacement.
- High Accuracy: Utilizes a 10K Ohm Type II NTC thermistor for precise resistance-to-temperature conversion and reduced signal drift.
- Local Control Features: Includes a high-accuracy set point slide and a manual override for immediate occupant comfort adjustments.
- Streamlined Installation: Features an unpluggable termination block that minimizes wiring errors and speeds up field service.
- Industrial Durability: The Series 1000 design is maintenance-free and built to withstand rigorous commercial environments.
Common Questions
- Is this sensor compatible with non-Siemens controllers? While designed primarily for Siemens TEC systems, it can function with any controller that accepts a standard 10K-2 NTC input curve.
- How do I test if the thermistor is failing? Use a digital multimeter to measure the resistance across the sensing terminals; at 77°F (25°C), the sensor should read approximately 10,000 ohms.
- Does this model support humidity sensing? No, the 540-660B is a dedicated room temperature sensor; for humidity, a different Series 1000 or 2000 model is required.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












