Heat Trace Limiter | Eltherm Ex-Box LIM/DIS Limiter with Display for Hazardous Areas

Product Overview

Heat Trace Limiter | Ex-Box LIM/DIS

Eltherm‘s Ex-Box LIM/DIS Limiter is an electronic Heat Trace Limiter, designed for shutting down the connection electrical trace heating with last effect in case of overheating risks. Applicable for frost protection, temperature maintenance, silos, containers, tanks, pipelines, valves and pumps, the Eltherm Heat Trace Limiter is suitable for installation in potentially explosive atmospheres (Ex Certified), as well as indoor our outdoor use.

The Ex-Box LIM/DIS features an integrated control panel with display and an integrated bus interface, which can be used for programming and operation. The interface of the Trace Heating Limiter allows for central evaluation and parametrisation in the measurement control station, with simultaneous decentralised use of the Ex Box Heat Trace Limiter locally on the corresponding heating circuits.

Heat Trace Limiter Benefits & Advantages

• Wall mounting
• Sturdy housing IP65
• Operating in Ex Hazardous Areas
• Increased safety through alarm messages
• Heating circuit monitoring
• Display

With over 40+ years of industry experience, our team of heat tracing specialists are available to provide you with expert engineering value, offering tailored solutions, such as the Heat Trace Limiter to improve and maximise efficiency for your trace heating system and operations. Explore our extensive Eltherm range further, including the Heat Trace Thermostats for hazardous areas Ex-Box REG/LED and Ex-Box REG/DIS. Let’s get talking – we’ll help you get it right first time.

Trace Heating Limiter Technical Specifications

The following tables includes a further insight on the technical specifications of Eltherm’s Heat Trace Limiter Ex-Box LIM/DIS with Display, designed for Hazardous Areas:

Heat Trace Limiter ATEX Hazardous Area Approvals

II 2G Ex emb [ib] IIC T4
II 2D Ex tD A21 IP65 T100°C
IBExU04ATEX1165X

Temperature Sensors Checklist

ELTF-PT.15 | PT100 3 wires, 3.0 m PTFE-cable | 0650070
ELTF-PT.2 | Double PT100 3-wire, 3.0 m PFA-cable | 0650072

Eltherm Ex-Box LIM/DIS Limiter Applications

In environments where temperature limits must not be exceeded for safety or process reasons, the Ex-Box LIM/DIS Heat Trace Limiter provides critical protection for trace heating systems. Designed for use in ATEX-rated Hazardous Areas, this device monitors temperature levels and disconnects power if maximum limits are surpassed. It helps safeguard personnel, equipment, and materials in industries where thermal control is essential but overheating poses serious risk.

• Oil & Gas Facilities
  Prevents overheating of trace-heated lines, reducing fire and explosion risks in volatile environments.

• Chemical Manufacturing
  Ensures heating circuits shut off before temperature thresholds are exceeded, protecting sensitive processes and equipment.

• Pharmaceutical Production
  Safeguards high-purity systems by limiting maximum heat exposure in cleanroom-compatible hazardous zones.

• Food Processing Plants
  Monitors trace heating on lines carrying heat-sensitive ingredients like oils or chocolate to avoid degradation.

• Power Plants & Utilities
  Applies temperature limit control to cable protection systems and auxiliary heating circuits near critical infrastructure.

• Tanker Loading Terminals
  Ensures safe operation by capping trace heating temperatures during loading/unloading of flammable materials.

• Paints, Solvents & Coatings
  Protects storage and transfer lines carrying flammable, temperature-sensitive liquids from dangerous overheating.

Eltherm Ex-Control Controller Pad For Ex-Box LIM/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 Limiters and Thermostats 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.

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

• 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 | Heat Trace Solutions

Expertly Engineered German Heat Trace Solutions

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.