HFT Flameproof Air Sensing Thermostats

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EXHEAT Industrial's HFT thermostats are supplied in weatherproof or explosionproof enclosures to complement our heaters. All thermostats are certified for use in hazardous areas where the atmosphere is classified as a Zone 1 or 2 (IIA, IIB, IIC) gas group. The HFT is designed for the temperature control of work or storage areas, in conjunction with a hazardous area air heater.





Certification ATEX / IECEx II 2 G
Ex d IIC T6 Zone 1 and 2
CSA (CEC / NEC) Class I, Division 2, Groups A, B, C, D; T6, Type 4X (USA / CAN)
CSA (CEC) Ex db IIC; T6 Gb; IP66 (CAN)
CSA (NEC) Class I, Zone 1, AEx db IIC; T6 Gb; IP66 (USA)
Enclosure Cast 316 stainless steel with 2 x M20 cable entries, external and internal earths and internal neutral link
Controls Choice of control range: 0 to 25°C, 0 to 40°C or 0 to 60°C options
Mounting 2 x 6mm dia shrouded mounting holes are provided
Voltage SPDT, 20A on 250VAC in a choice of switching configuration
Hysteresis +/- 5°C - 7°C
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