EXHEAT HFT40 Hazardous Area Thermostats | Flameproof Air Sensing Thermostat Zone 1 Zone 2
EXHEAT HFT40
Hazardous Area Thermostats
EXHEAT HFT40 hazardous area thermostats provide temperature control for hazardous area heating and air warming for Zone 1 & Zone 2 (Flammable Gas) explosive atmospheres according to ATEX Directive.
The EXHEAT HFT40 thermostat is supplied in a weatherproof or explosion proof enclosure to compliment the range of hazardous area air warmers and is designed for the temperature control of work or storage areas – suitable for ambient temperatures from -60°C to +60°C.
HFT40 Hazardous Area Thermostats Key Features
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Temperature range: 0–40°C
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Rated current: 20A at 250V AC
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Flameproof Ex d certified for Zone 1 & 2
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ATEX and IECEx approved
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Ingress protection: IP6X
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Aluminium flameproof enclosure
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Internal or external adjustment options
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Installation – wall mounted thermostats for hazardous area locations
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Ambient temperatures from -60°C to +60°C
| Specification | Details |
|---|---|
| Model | HFT40 |
| Temperature Range | 0°C to 40°C |
| Current Rating | 20A (250V AC) |
| Enclosure | Aluminium, flameproof Ex d |
| Ingress Protection | IP6X |
| Mounting | Wall / surface mount |
| Adjustment | Internal or external option |
| Certification | ATEX, IECEx compliant |
EXHEAT HFT40 Hazardous Area Thermostats
ATEX CERTIFICATION
Certification: ATEX / IECEx 
II 2G Ex db IIC T6 Gb
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)
CU TR (EAC)
ATEX / IECEx II 2G Ex db IIC T6 Gb
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)
CU TR (EAC)
This sample Wiring Drawing is for the EXHEAT HFT model of thermostats – for all other heater wiring drawings refer to the O&M download opposite.
Please download EXHEAT HFT hazardous area thermostats O&M manual for full details on installation and maintenance procedures – this includes wiring diagrams, earth connection and pre installation inspection and checks.
| Specification | Details |
|---|---|
| Enclosure | Cast 316 stainless steel with 2 × M20 cable entries, external and internal earths and internal neutral link, ingress protection IP66 |
| Controls | Choice of control range: 0°C to 40°C or 0°C to 60°C |
| Mounting | 2 × 6mm dia shrouded mounting holes are provided. Wall mounted |
| Voltage | SPDT, 20A on 250VAC in a choice of switching configuration |
| Ambient Temperature | -60ºC to +60ºC |
EXHEAT HFT40 HAZARDOUS AREA thermostats – APPLICATIONS
Applications for these hazardous area thermostats include:
- Accumulator System Cabinet
- Acoustic Enclosure
- Air Heating for Instrumentation
- Anti Condensation Heater
- Anti-Freeze
- Battery Cabinet Heater
- Cabinet
- Chemical Injection Cabinet
- Compressor Enclosure
- Compressor Frame Enclosure
- Condensation Prevention
- Control / Monitoring Panels
- Control Housing
- Diesel Generator Enclosure
- Electrical Panel
- Enclosures
- Fire Equipment Cabinet
- Frost Protection
- Gas Seal Panel
- GRP Enclosure
- Hazardous Area Process Temperature Measurement
- Heating Cabinet
- Instrumentation Cabinet
- Instrumentation for Compressor Package
- Junction Boxes
- Machine Enclosure
- Motor Cases/Enclosures
- Motor Enclosure
- Offshore Cabinet
- Offshore Panel Heater
- Outdoor Telecommunications Cabinet
- Panel for Compressors
- Panel Heaters
- Power Distribution Panels
- Process Temperature Measurement
- Pump Enclosure Safety Stat
- Silo Base Enclosure warming
- Skid Enclosure
- Switchgear Panel/Cubicles
- Temperature Measurement
- Thermowell Assemblies
- Thermowells
- Transformer Enclosures
- Transmitter Enclosures
- Wardrobe
EXHEAT HFT40 Hazardous Area Thermostats
These HFT40 hazardous area thermostats are suitable for Zone 1 & Zone 2 (IIA, IIB, IIC) gas groups according to ATEX.
EXHEAT HFT Hazardous Area Thermostats – Dimensions
EXHEAT HFT40 Thermostat FAQs
What is the temperature range of the EXHEAT HFT40?
The EXHEAT HFT40 operates within a specific temperature range ideal for industrial applications. Discover the exact range and its use cases.
Is the HFT40 suitable for hazardous areas?
The HFT40 meets key certifications for hazardous locations. Find out where it can be safely installed.
What is the current rating of the HFT40 thermostat?
This thermostat is designed for industrial power loads. Learn more about its current and voltage ratings.
Related Products
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EXHEAT AFT Thermostat (flameproof air-sensing, stainless steel, IP66)
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EXHEAT RFT Thermostat – process-sensing in flanged boss for liquid applications
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EXHEAT FXT Thermostat – compact, enclosure-mounted air thermostat
Need Help Choosing the Right Model?
Speak to our hazardous area heating specialists for expert advice on product selection, certification support, or installation queries.
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Over 40 years’ experience in industrial heating
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Authorised EXHEAT distributor
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Fast UK & international delivery
Air Heaters | Immersion Heaters | Line Heaters | Thermostats | ATEX & IECEX Certified Electrical Heaters
T&D – EXPERTS IN EQUIPMENT FOR EXPLOSIVE ATMOSPHERES
Trust Thorne & Derrick to specify and supply from stock safe and reliable Heat, Light & Power Products for use in hazardous area locations and explosive atmospheres certified to international standards including ATEX and IECEx – this includes Zone 1 / Zone 2 (Flammable Gas) or Zone 21 / Zone 22 (Dusts) and Class I, Division 1 and Division 2 hazardous area requirements.
Since 1985 as Leaders in ATEX Innovation we can facilitate succession planning for the replacement of obsolete, non-conformant and legacy equipment – we are the provider of innovative solutions to ensure ATEX and IECEx Compliance for Electrical, HVAC & Process Instrumentation systems in the explosive atmosphere industries.
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EXHEAT HFT Hazardous Area Thermostats – Data Sheet
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