MAMAC Systems TE-703-A-12-A-2 Temperature Sensor

The MAMAC Systems TE-703-A-12-A-2 is a field-proven immersion temperature sensor designed for precise fluid monitoring in hydronic systems. This unit features a 10,000 Ohm NTC Thermistor (Type II), ensuring high-accuracy resistance output compatible with BMS controllers from manufacturers like Trend, Andover, and Delta. The 4-inch 304 stainless steel probe provides excellent thermal conductivity and corrosion resistance, while the 1/4 inch NPT adapter allows for seamless installation into standard thermowells. Engineered with a ruggedized NEMA 4/IP65 enclosure, this sensor maintains long-term stability and signal integrity in demanding mechanical rooms, preventing drift in temperature readings that can compromise HVAC efficiency. Whether monitoring chilled water loops or hot water boilers, the TE-703-A-12-A-2 delivers the interchangeability and rapid response required for tight proportional-integral-derivative control loops.

Technical Benefits

• Precision thermistor accuracy eliminates the need for frequent field calibration or offsets.
• 304 Stainless Steel Construction prevents pitting and scaling in high-velocity fluid applications.
• Standard 1/4" NPT fitting ensures compatibility with most existing piping heat wells.
• Moisture-resistant housing protects internal terminations against condensation and industrial contaminants.
• Type II Thermistor curve provides a high signal-to-noise ratio for reliable automation feedback.

Common Contractor Questions

Can I install this sensor without a thermowell?
While the 1/4" NPT adapter facilitates mounting, it is standard practice to use a compatible 304 or 316 stainless steel thermowell to protect the probe from line pressure and allow for replacement without draining the system.

What is the resistance-to-temperature curve for this sensor?
The TE-703-A-12-A-2 utilizes a 10k Type 2 NTC curve, which follows a specific non-linear resistance path, peaking at 10,000 Ohms at 77°F (25°C).

Is this sensor compatible with 24VAC circuits?
This is a passive resistive device. It does not require power itself but is designed to be part of a low-voltage analog input circuit provided by the building controller.

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.