
Siemens Building Technology 535-490-36 Sensor
The Siemens Building Technology 535-490-36 is a rigid averaging duct sensor engineered for precise thermal monitoring in commercial air handling systems. This industrial-grade duct temperature sensor features a 36-inch rigid probe housing a 100 Ohm Platinum RTD (Pt100) sensing element, providing high-accuracy feedback across its 20°F to 120°F (-7°C to 49°C) measurement range. Designed for field reliability, it converts thermistor readings into a standard 4-20mA output signal, making it natively compatible with most North American building automation systems (BAS) and programmable logic controllers. The unit is housed in a standard 2x4 inch NEC-approved utility box with 1/2-inch knockouts, simplifying integration into existing electrical infrastructure. By utilizing an averaging element, this sensor mitigates the risk of inaccurate readings caused by air stratification or localized hot/cold spots within large ductwork runs. Connection is handled via durable lead wires, ensuring a secure interface for long-term HVACR deployment without the need for specialized installation tools.
- Precise Averaging: The 36-inch rigid probe ensures temperature readings represent the average duct environment, preventing localized errors.
- Industrial Standard Output: Utilizes a 4-20mA signal for seamless integration with commercial HVAC controllers and PLC systems.
- Robust Construction: Equipped with a NEMA-compatible junction box and a Platinum RTD element for stable, long-term performance.
- Broad Compatibility: Supports a 24V DC/AC power supply, fitting standard commercial building power requirements.
- Simplified Mounting: Includes standard conduit knockouts and mounting hardware for efficient field installation.
Common Questions
What is the primary advantage of using an averaging sensor over a single-point sensor?
In large ducts, air temperature is rarely uniform. An averaging duct sensor like the 535-490-36 measures the temperature across the full 36-inch length of the probe, providing a more representative data point for the controller than a single-point sensor could achieve.
Can this sensor be used in outdoor air intakes?
While calibrated for a 20°F to 120°F range, it is primarily designed for duct-mounted applications. For outdoor air, ensure the enclosure is properly protected from direct moisture and that the expected ambient temperatures fall within the specified -7°C to 49°C operating window.
Does this unit require a separate transmitter?
No, the Siemens 535-490-36 includes an integrated 4-20mA transmitter within the utility box assembly, allowing you to pull a loop-powered signal directly to your controller.
This item is not eligible for free shipping.
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: $143.03
-65%$143.03
$50.06Siemens Building Technology 535-490-36 Sensor
The Siemens Building Technology 535-490-36 is a rigid averaging duct sensor engineered for precise thermal monitoring in commercial air handling systems. This industrial-grade duct temperature sensor features a 36-inch rigid probe housing a 100 Ohm Platinum RTD (Pt100) sensing element, providing high-accuracy feedback across its 20°F to 120°F (-7°C to 49°C) measurement range. Designed for field reliability, it converts thermistor readings into a standard 4-20mA output signal, making it natively compatible with most North American building automation systems (BAS) and programmable logic controllers. The unit is housed in a standard 2x4 inch NEC-approved utility box with 1/2-inch knockouts, simplifying integration into existing electrical infrastructure. By utilizing an averaging element, this sensor mitigates the risk of inaccurate readings caused by air stratification or localized hot/cold spots within large ductwork runs. Connection is handled via durable lead wires, ensuring a secure interface for long-term HVACR deployment without the need for specialized installation tools.
- Precise Averaging: The 36-inch rigid probe ensures temperature readings represent the average duct environment, preventing localized errors.
- Industrial Standard Output: Utilizes a 4-20mA signal for seamless integration with commercial HVAC controllers and PLC systems.
- Robust Construction: Equipped with a NEMA-compatible junction box and a Platinum RTD element for stable, long-term performance.
- Broad Compatibility: Supports a 24V DC/AC power supply, fitting standard commercial building power requirements.
- Simplified Mounting: Includes standard conduit knockouts and mounting hardware for efficient field installation.
Common Questions
What is the primary advantage of using an averaging sensor over a single-point sensor?
In large ducts, air temperature is rarely uniform. An averaging duct sensor like the 535-490-36 measures the temperature across the full 36-inch length of the probe, providing a more representative data point for the controller than a single-point sensor could achieve.
Can this sensor be used in outdoor air intakes?
While calibrated for a 20°F to 120°F range, it is primarily designed for duct-mounted applications. For outdoor air, ensure the enclosure is properly protected from direct moisture and that the expected ambient temperatures fall within the specified -7°C to 49°C operating window.
Does this unit require a separate transmitter?
No, the Siemens 535-490-36 includes an integrated 4-20mA transmitter within the utility box assembly, allowing you to pull a loop-powered signal directly to your controller.
This item is not eligible for free shipping.
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.
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Description
The Siemens Building Technology 535-490-36 is a rigid averaging duct sensor engineered for precise thermal monitoring in commercial air handling systems. This industrial-grade duct temperature sensor features a 36-inch rigid probe housing a 100 Ohm Platinum RTD (Pt100) sensing element, providing high-accuracy feedback across its 20°F to 120°F (-7°C to 49°C) measurement range. Designed for field reliability, it converts thermistor readings into a standard 4-20mA output signal, making it natively compatible with most North American building automation systems (BAS) and programmable logic controllers. The unit is housed in a standard 2x4 inch NEC-approved utility box with 1/2-inch knockouts, simplifying integration into existing electrical infrastructure. By utilizing an averaging element, this sensor mitigates the risk of inaccurate readings caused by air stratification or localized hot/cold spots within large ductwork runs. Connection is handled via durable lead wires, ensuring a secure interface for long-term HVACR deployment without the need for specialized installation tools.
- Precise Averaging: The 36-inch rigid probe ensures temperature readings represent the average duct environment, preventing localized errors.
- Industrial Standard Output: Utilizes a 4-20mA signal for seamless integration with commercial HVAC controllers and PLC systems.
- Robust Construction: Equipped with a NEMA-compatible junction box and a Platinum RTD element for stable, long-term performance.
- Broad Compatibility: Supports a 24V DC/AC power supply, fitting standard commercial building power requirements.
- Simplified Mounting: Includes standard conduit knockouts and mounting hardware for efficient field installation.
Common Questions
What is the primary advantage of using an averaging sensor over a single-point sensor?
In large ducts, air temperature is rarely uniform. An averaging duct sensor like the 535-490-36 measures the temperature across the full 36-inch length of the probe, providing a more representative data point for the controller than a single-point sensor could achieve.
Can this sensor be used in outdoor air intakes?
While calibrated for a 20°F to 120°F range, it is primarily designed for duct-mounted applications. For outdoor air, ensure the enclosure is properly protected from direct moisture and that the expected ambient temperatures fall within the specified -7°C to 49°C operating window.
Does this unit require a separate transmitter?
No, the Siemens 535-490-36 includes an integrated 4-20mA transmitter within the utility box assembly, allowing you to pull a loop-powered signal directly to your controller.
This item is not eligible for free shipping.
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.












