Heat Trace Thermostat | Digital Temperature Controller for Hazardous Areas Up to 300°C

Heat Trace Thermostat | Digital Temperature Controller for Hazardous Areas Up to 300°C


Eltherm Heat Trace Thermostat

Offering a measuring range of -40°C up to +300°C, the Eltherm Heat Trace Thermostat is available in two variants, Ex-Box REG/LED and Ex-Box REG/DIS, Hazardous Areas Digital Temperature Controllers designed with an LED display or standard display. Compliant with the latest Ex protection directives, the Eltherm Heat Trace Thermostats are developed especially for temperature maintenance of heat trace systems used in hazardous areas, such as power plants, oil & gas, chemical, petrochemical and pharmaceutical plants, the plastic industry or wastewater treatment plants.

Eltherm Ex-Box REG/LED Heat Trace Thermostat

Eltherm’s Digital Temperature Controllers are energy efficient (saving up to 75%), increase safety, reduce maintenance effort, prevent down-times and ensure temperature stability.

Eltherm Heat Trace Thermostat Technical Benefits

  • Rugged enclosure IP65
  • Programming & operation through integrated interactable smart displays.
  • Increased safety, tamperproof, no unauthorised adjustments
  • Increased safety through fail alarm
  • Integrated heating circuit monitoring
  • Operation and programming in hazardous areas up to 300°C
  • ATEX & IECEx certified/approved

Thorne & Derrick’s team of heat trace specialists are available to provide effective solutions to your Trace Heating System Design, including intelligent control systems, such as the Ex-Box REG/LED and Ex-Box REG/DIS. As the UK’s largest Heat Trace supplier, our engineered solutions are proven to decrease potential downtime and maximise revenue generation & energy efficiency.

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Digital Temperature Controller Technical Specifications

The Eltherm Ex-Box Heat Trace Thermostat range plays a crucial role in the temperature maintenance of trace heating systems, which are used to maintain or raise the temperature of pipes and vessels. Selecting the ideal digital temperature controller for your heat trace operations is crucial to ensure a safe and fail-proof system.

Eltherm Heat Trace Thermostat Hazardous Areas Technical Specifications
Eltherm Ex-Box REG/LED Temperature Controller Eltherm Ex-Box REG/DIS Temperature Controller
Certificate IBExU 04 ATEX 1165 X Certificate IBExU 04 ATEX 1165 X
Classification ll 2G Ex emb [ib] llC T4 Gb ll 2D
Ex tb IIIC T100°C Db -32 °C <= Ta
<= 60 °C
Classification ll 2G Ex emb [ib] llC T4 Gb ll 2D
Ex tb IIIC T100 °C Db -32 °C <= Ta
<= 60 °C
Dimensions 140 x 140 x 150 mm (wxhxd)
without wall-mounting bracket,
excluding glands
Dimensions 140 x 140 x 150 mm (wxhxd)
(without wall-mounting bracket,
excluding glands)
Enclosure Aluminium Enclosure Aluminium
IP Rating IP 65 IP Rating IP 65
Ambient Temperature -32 up to 60 °C Ambient Temperature -32 up to 60 °C
Switching Capacity 16 A Switching Capacity 16 A
Display 2 x 4 35-segment LED Display 2 x 4 35-segment LED
Operating Voltage 230 V +/– 10 % Operating Voltage 230 V +/– 10 %
Nominal Current Max. 100 mA Nominal Current Max. 100 mA
Load Current, Max. 16 A (ohm resistive load) Load Current, Max. 16 A (ohm resistive load)
Load Output 230 V / 16 A, 2-pole Load Output 230 V / 16 A, 2-pole
Alarm Output Optically separated 100 mA Alarm Output Optically separated 100 mA
Interface Intrinsically safe for Ex-Connect Interface Intrinsically safe for Ex-Connect
(bus connection)
Measurement Input Pt100 2/3 wire, intrinsically safe Measurement Input Pt100 2/3 wire, intrinsically safe
Measurement Range -40 °C up to +300 °C Measurement Range -40 °C up to +300 °C
Control Characteristics Dual mode controller Control Characteristics Dual mode controller
Load Disconnection 2-phase Load Disconnection N/A
Weight Approx. 3.5 kg Weight Approx. 3.5 kg

 

Heat Trace Thermostat Cable EntriesATEX Certified For Hazardous Areas

  • 1 x M25 for voltage supply (9-13 mm; with add-ons for 11-15 mm)
  • 1 x exchangeable panel seal 7-10.5 mm
  • 1 x M25 for heating line (2-fold 6 mm)
  • 1 x M20 for sensor (tension range 3-4 mm)
  • 1 x vent screw M20

Heat Trace Thermostat Applications

Designed for use in explosive atmospheres, the Eltherm Ex-Box REG/DIS and Ex-Box REG/LED devices ensure reliable operation of heating circuits, offering advanced monitoring, control, and alarm functions directly in the field. Whether preventing freezing, maintaining process temperatures, or ensuring safe storage conditions, these controllers play a vital role across a range of demanding industrial applications.

  • Oil & Gas Pipelines
    Maintains flow by preventing wax or hydrate formation in hazardous area pipelines.

  • Chemical Processing
    Ensures stable temperatures for reactive or sensitive chemicals in Ex-rated zones.

  • Pharmaceutical Manufacturing
    Controls heating for temperature-critical ingredients in cleanroom-classified areas.

  • Food & Beverage Production
    Keeps materials like syrups or fats at process temperature in flammable environments.

  • Water & Waste Treatment
    Prevents freezing in exposed pipes and tanks containing water, sludge, or chemicals.

  • LNG Storage & Transfer
    Manages heating around valves and pipelines to prevent condensation and pressure issues.

  • Paints & Adhesives
    Maintains viscosity of resins and coatings during storage and transfer in solvent-rich areas.


Eltherm Ex-Control Controller Pad For Ex-Box REG/LED

Eltherm‘s intrinsically safe hand-held controller pad is designed as an additional safety accessory, for use with the LED Ex-Box Heat Trace Thermostats and Limiters range in hazardous areas/explosive atmospheres. The Ex-Control Hand-Held Controller Pad acts as a safer solution to parametrise and query parameters of the REG/LED and LIM/LED Ex-Box devices (not compatible with the Ex-Box REG/DIS Heat Trace Thermostat).

The Eltherm Ex-Control detects the connected device and automatically activates the corresponding software. Ex-Control doesn’t include its own power supply, which is supplied by the connected devices.

Available on request with the Eltherm Ex-Box range.

Hand-held Controller Pad Advantages

Eltherm Ex-Control Hand-held Controller Pad for Heat Trace Thermostats & Limiters

  • Intrinsically safe control panel
  • Does not have its own power supply
  • Operation and programming in the Ex-area

Fault Indication

  • Sensor short
  • Sensor cut
  • Excess temperature Pt100
  • Low temperature Pt100
  • Internal excess temperature
  • External bus fault
  • Internal bus fault
  • Internal hardware fault
  • Supply voltage fault
Eltherm Ex-Control Hand-held Controller Pad Technical Specifications
Interface Intrinsically safe for Ex-box LED/LIM
Cable entry 1.5 m connection cable with 5-pole plug
Ambient temperature -32 to 60 °C
Display 2 x 4 35-segment display with backlighting
Housing material  Aluminium
Protection IP 65
Dimensions 135 x 80 x 35mm (WxHxD)
Weight approx. 0.5 kg

Eltherm | Heat Trace Solutions

Expertly Engineered German Heat Trace Solutions

German engineered, UK supplied by Thorne & Derrick, Eltherm manufacture an extensive range of, silicone heating matstrace heating cablesdrum heatersheating jacketsheating matsheating mantlesheated hoses, trace heating tool boxes for hazardous areas (ATEX & IECEx certified). Our team of experts are available to provide Custom Eltherm Trace Heating Systems, including complete specification and design, tailored to meet an extensive range of industry and commercial needs.

Thorne & Derrick & Eltherm

Data Sheets