Siemens Building Technology 535-490-18 Temperature Sensor
The Siemens Building Technology 535-490-18 is a professional-grade duct averaging temperature sensor designed for precise climate monitoring in large-scale HVAC commercial systems. Utilizing a 100 Ohm Platinum RTD sensing element, this unit effectively mitigates the risks of temperature stratification by averaging the thermal profile across the airflow. The 18-inch rigid probe is constructed for durable deployment within supply or return air ducts, providing a stable 4-20mA output signal proportional to a calibrated range of 20°F to 120°F (-7°C to 49°C). Engineered for seamless integration with Building Automation Systems (BAS) and PLC controllers, the sensor features a standard NEC-approved 2x4 inch utility box with 1/2-inch knockouts, ensuring a familiar and efficient installation process for field technicians. This analog temperature transmitter is ideal for monitoring discharge air and managing morning warm-up/cool-down cycles where high-accuracy feedback is non-negotiable for system efficiency.
- Platinum RTD Precision: Employs a high-stability 100 Ohm Platinum element for accurate, long-term linear response.
- Stratification Compensation: The 18-inch rigid probe averages air temperature to eliminate errors caused by uneven mixing.
- Standardized Output: Features a loop-powered 4-20mA signal for easy scaling and interference resistance over long wire runs.
- Contractor-Friendly Design: Includes a rugged electrical utility box mount with standard knockouts for rapid field wiring.
- Optimized Operating Range: Calibrated specifically for the 20-120°F window common in standard commercial air handling units.
Common Questions
How do I wire the 4-20mA output for this Siemens sensor?This is a two-wire, loop-powered device. You must provide a DC supply voltage (typically 18-36Vdc) in series with the sensor and your controller's analog input. Resistance in the loop will determine the current flow between 4mA at 20°F and 20mA at 120°F.
Is the 535-490-18 suitable for high-humidity environments?The unit features an IP54-rated housing protection, making it suitable for standard duct environments. However, ensure that the utility box is mounted securely to the duct skin using the provided hardware to maintain seal integrity against condensation.
What is the benefit of a rigid probe over a flexible averaging lead?A rigid probe like the one on the 535-490-18 is easier to install in smaller to mid-sized ducts where a straight-line average is sufficient. It requires fewer mounting clips than a flexible lead and maintains its position in high-velocity airflow without sagging.
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: $99.80
-65%$99.80
$34.93Siemens Building Technology 535-490-18 Temperature Sensor
The Siemens Building Technology 535-490-18 is a professional-grade duct averaging temperature sensor designed for precise climate monitoring in large-scale HVAC commercial systems. Utilizing a 100 Ohm Platinum RTD sensing element, this unit effectively mitigates the risks of temperature stratification by averaging the thermal profile across the airflow. The 18-inch rigid probe is constructed for durable deployment within supply or return air ducts, providing a stable 4-20mA output signal proportional to a calibrated range of 20°F to 120°F (-7°C to 49°C). Engineered for seamless integration with Building Automation Systems (BAS) and PLC controllers, the sensor features a standard NEC-approved 2x4 inch utility box with 1/2-inch knockouts, ensuring a familiar and efficient installation process for field technicians. This analog temperature transmitter is ideal for monitoring discharge air and managing morning warm-up/cool-down cycles where high-accuracy feedback is non-negotiable for system efficiency.
- Platinum RTD Precision: Employs a high-stability 100 Ohm Platinum element for accurate, long-term linear response.
- Stratification Compensation: The 18-inch rigid probe averages air temperature to eliminate errors caused by uneven mixing.
- Standardized Output: Features a loop-powered 4-20mA signal for easy scaling and interference resistance over long wire runs.
- Contractor-Friendly Design: Includes a rugged electrical utility box mount with standard knockouts for rapid field wiring.
- Optimized Operating Range: Calibrated specifically for the 20-120°F window common in standard commercial air handling units.
Common Questions
How do I wire the 4-20mA output for this Siemens sensor?This is a two-wire, loop-powered device. You must provide a DC supply voltage (typically 18-36Vdc) in series with the sensor and your controller's analog input. Resistance in the loop will determine the current flow between 4mA at 20°F and 20mA at 120°F.
Is the 535-490-18 suitable for high-humidity environments?The unit features an IP54-rated housing protection, making it suitable for standard duct environments. However, ensure that the utility box is mounted securely to the duct skin using the provided hardware to maintain seal integrity against condensation.
What is the benefit of a rigid probe over a flexible averaging lead?A rigid probe like the one on the 535-490-18 is easier to install in smaller to mid-sized ducts where a straight-line average is sufficient. It requires fewer mounting clips than a flexible lead and maintains its position in high-velocity airflow without sagging.
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 535-490-18 is a professional-grade duct averaging temperature sensor designed for precise climate monitoring in large-scale HVAC commercial systems. Utilizing a 100 Ohm Platinum RTD sensing element, this unit effectively mitigates the risks of temperature stratification by averaging the thermal profile across the airflow. The 18-inch rigid probe is constructed for durable deployment within supply or return air ducts, providing a stable 4-20mA output signal proportional to a calibrated range of 20°F to 120°F (-7°C to 49°C). Engineered for seamless integration with Building Automation Systems (BAS) and PLC controllers, the sensor features a standard NEC-approved 2x4 inch utility box with 1/2-inch knockouts, ensuring a familiar and efficient installation process for field technicians. This analog temperature transmitter is ideal for monitoring discharge air and managing morning warm-up/cool-down cycles where high-accuracy feedback is non-negotiable for system efficiency.
- Platinum RTD Precision: Employs a high-stability 100 Ohm Platinum element for accurate, long-term linear response.
- Stratification Compensation: The 18-inch rigid probe averages air temperature to eliminate errors caused by uneven mixing.
- Standardized Output: Features a loop-powered 4-20mA signal for easy scaling and interference resistance over long wire runs.
- Contractor-Friendly Design: Includes a rugged electrical utility box mount with standard knockouts for rapid field wiring.
- Optimized Operating Range: Calibrated specifically for the 20-120°F window common in standard commercial air handling units.
Common Questions
How do I wire the 4-20mA output for this Siemens sensor?This is a two-wire, loop-powered device. You must provide a DC supply voltage (typically 18-36Vdc) in series with the sensor and your controller's analog input. Resistance in the loop will determine the current flow between 4mA at 20°F and 20mA at 120°F.
Is the 535-490-18 suitable for high-humidity environments?The unit features an IP54-rated housing protection, making it suitable for standard duct environments. However, ensure that the utility box is mounted securely to the duct skin using the provided hardware to maintain seal integrity against condensation.
What is the benefit of a rigid probe over a flexible averaging lead?A rigid probe like the one on the 535-490-18 is easier to install in smaller to mid-sized ducts where a straight-line average is sufficient. It requires fewer mounting clips than a flexible lead and maintains its position in high-velocity airflow without sagging.
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.
