MAMAC Systems TE-702-B-3-C Temperature Sensor

The MAMAC Systems TE-702-B-3-C is a professional-grade duct temperature sensor engineered for precise thermal monitoring in high-demand commercial HVAC systems. This unit features a 1,000 Ohm Platinum RTD element with a 385 alpha coefficient, ensuring high-sensitivity resistance changes of 2.1 ohms per degree Fahrenheit. This higher nominal resistance significantly mitigates the impact of lead wire resistance, making it the preferred choice for long-distance runs between the HVAC sensor and your building automation system (BAS). The 8-inch probe is constructed from 304 stainless steel and is hermetically sealed to prevent moisture ingress, preserving signal integrity in fluctuating airflow conditions. Housed in a rugged 18-gauge NEMA 1 galvanized steel enclosure, the sensor includes a keyed cover for easy access and a 1/2-inch conduit connection. Its design facilitates a low-profile mating surface with an external mounting bracket that conforms to irregular ductwork, streamlining installation for mechanical contractors.

• Platinum RTD Precision: The 1K Ohm Platinum RTD sensor provides superior linear response and long-term stability compared to standard thermistors.
• Superior Signal-to-Noise Ratio: Higher resistance values reduce self-heating errors and voltage drop issues over extended cable lengths.
• Industrial-Grade Build: The stainless steel probe and galvanized enclosure are built to withstand the mechanical stresses of air handlers and plenums.
• Efficient Integration: Compatible with most industry-standard controllers requiring a 1,000 Ohm RTD input without the need for additional signal conditioning.

What is the advantage of a 1,000 Ohm RTD over a 100 Ohm version for duct sensing?
The 1,000 Ohm element provides ten times the sensitivity of a 100 Ohm sensor. This means technical errors caused by the resistance of the lead wires are reduced by a factor of ten, allowing for more accurate readings without requiring 3-wire or 4-wire compensation in many applications.

How does this sensor handle moisture and condensation within the duct?
The probe is hermetically sealed and crimp-attached to the enclosure flange. This ensures that the sensing element remains isolated from the airflow's humidity, preventing the drift often seen in lower-quality sensors.

Is this sensor compatible with my specific BAS or controller?
This model outputs a standard resistance signal based on a 1,000 Ohm Platinum curve (Alpha 385). Check your controller's technical manual to ensure it supports Pt1000 RTD inputs.

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.