Siemens Building Technology QAM2030.020 Temperature Sensor

The Siemens QAM2030.020 is a heavy-duty duct temperature sensor engineered for precision monitoring in commercial HVAC automation systems. Featuring a 10k Ohm Type 2 thermistor sensing element, this unit delivers highly accurate resistance-based feedback to your Building Automation System (BAS) or Direct Digital Control (DDC) controller. The 8-inch rigid stainless steel probe is designed for point-source measurement, making it ideal for monitoring discharge air, return air, or mixed air temperatures in medium-sized ductwork. With an operational range of -40 to 180 degrees Fahrenheit, this sensor maintains a tight accuracy of ±0.4°F at 77°F, ensuring stable performance in demanding environments like air handling units (AHU). The NEMA 1 rated junction box enclosure includes standard 1/2-inch knockouts, simplifying field wiring via high-quality lead connections. For technicians requiring a reliable duct mount sensor that integrates seamlessly with most North American 10k Type 2 controllers, the QAM2030.020 is a standard-issue solution for peak forced air HVAC efficiency.

Key Benefits

• Universal Compatibility: Standard 10k Ohm Type 2 thermistor curve matches most industry-standard controllers for easy field replacement.
• Rugged Construction: Features a durable 8-inch rigid probe and a metallic junction box enclosure for long-term survival in high-velocity airflow.
• Precise Response: Engineered with a high-accuracy NTC element to ensure rapid detection of temperature fluctuations within the duct.
• Easy Installation: Designed with integrated mounting hardware and standard 2x4 electrical box housing for quick HVAC duct sensor deployment.
• Wide Operating Range: Covers a broad thermal spectrum from -40 to 180 degrees Fahrenheit, suitable for both heating and cooling applications.

Common Questions

Is the QAM2030.020 suitable for outdoor air intake monitoring?
This model is rated NEMA 1 and is primarily intended for indoor duct applications. For outdoor air or high-moisture environments, ensure the enclosure is properly protected or use a NEMA 4X rated alternative.

What is the difference between this and an averaging sensor?
The QAM2030.020 is a point sensor, meaning it measures the temperature at the specific tip of the 8-inch probe. Averaging sensors use flexible coils to measure temperature across the entire cross-section of a large duct to account for stratification.

Does this sensor require calibration before installation?
Siemens thermistors are factory-calibrated to the 10k Type 2 curve. As a passive resistance device, it does not require field calibration, though you should always verify the resistance at the controller terminals to account for wire length voltage drop.

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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.