Duct Averaging Temperature Sensor – Maltec-T MT-705


  • Probe construction — 3/8″ (9mm) bendable thin wall aluminum probe
  • TE-705 incorporates four fast response environmentally sealed sensor modules
  • Available with galvanized steel, NEMA-1 (IP-30) or NEMA-4 (IP-65) powder coated steel enclosure to cover all applications
  • More than 16 types of interchangeable NTC thermistors, precision platinum, nickel or balco RTDs are available for universal compatibility

The MT-705 provides a rugged, reliable solution for measuring average supply air temperature in large ducts or plenums. The MT-705 bendable aluminum probe averaging temperature sensor incorporates four evenly-spaced sensor modules over 6, 12 or 24 feet (1.8, 3.6 or 7.2 meter) lengths. The sensor modules are environmentally sealed to protect against condensation. The complete assembly acts as a single sensor and any temperature change is averaged across the sensors. Galvanized steel or NEMA-4 (IP-65) powder coated steel enclosures are available. MT-705 is an ideal product for high air flow systems.


Platinum RTD Sensors ± 0.1% @ 0 C, Alpha: 385 per DIN 43760
Nickel RTD Sensors (#2) ± 0.5 C @ 0 C, 5000 PPM/K T.C.R.
Nickel RTD Sensors (#4) ± 0.5 F @ 70 F/21.1 C, 6000 PPM/K T.C.R.
Balco RTD Sensors  ± 0.5 F @ 70 F/21.1 C, 4300 PPM/K T.C.R.
Thermistor Sensors ± 0.2°C interchangeability @ 77 F/25 C
Operating Temperature -40F/-40C to 210F/100C
Probe Material 3/8″/9.53mm Bendable Aluminum
Flange Material Galvanized Steel
Steel NEMA-1/IP-30 18 Ga. Galvanized Steel
Steel NEMA-4/IP-65 18 Ga. Cold Rolled Steel, Baked on Enamel
Warranty Five Years (Lifetime on Moisture Migration)
EMC Conformance EN 55022, 55024, 61000-3-3, 61000-4-2, 3, 4, 5, 6 & 11
RoHS Compliant

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