EBARA's EHG2 is a powerful thermal controller that integrates an adjustable set point temperature controller, high/low temperature alert, power switching device, and a high temperature safety limit. This agencyrecognized safety limit controller meets UL® and CE requirements. The optional display/communications module is hot swapable and is used to provide digital display indication, adjustment of set point, RS485 Modbus® communications, and other Human Machine Interface (HMI) features. This flexible system allows you to purchase only what is needed for your application.

EHG2 Software

With the addition of an optional communication module, the EHG2 can manage, monitor, and manipulate via software. Change set points, label devices, change tuning parameters, check health status and much more all with the click of a key.

Optional Upgrade Modules

These upgrade modules are easy to install because there is no need to reconfigure, rewire or reorder the base unit. No technician is needed for the installation, which creates a seamless, cost-efficient system that can be upgraded at any time.

Features & Benefits

  • Process controller and safety limit in one package
    • Meets UL® and CE requirements
    • Eliminates the need for a thermal fuse on a heater
    • Eliminates replacement of heater when fuse fails
  • Optional display/communications module
    • Allows easy upgrade on to a base device
    • Offers low cost field upgrade
    • Provides easy, snap-on installation
  • Accurate and flexible temperature process controller
    • Replaces problematic bi-metal thermostats with accurate electronic temperature process controller
    • Allows easy change of process parameters
  • Ambient operating temperature range 0 to 70°C (32 to 158°F)
    • Increases reliability when mounting in harsh temperature environments or in close proximity to heaters
  • Integrated high/low temperature alert signal relay
    • Provides dry contact output to activate external alarm or process function
    • Signals control status with three integrated LEDs
    • Allows a signal of up to two amp 30V (ac/dc),Form A to alert if process temperature is out of range limits
  • Health check diagnostics
    • Monitors maximum heater process temperature, maximum ambient temperature and thermocouple operation
    • Provides health check signal to inform operator that the process is working correctly
  • Integrated power supply
    • Allows an input of 85 to 264V~(ac), 50/60Hz
    • Provides safe control of up to 2400 W with 10A switching in both controller and safety limit
  • Switched from on-off and PID algorithm
    • Increases product life (on-off control is default)
    • Offers selectable PID control algorithm for tighter temperature uniformity
  • Universal 1/8 turn mounting bracket
    • Allows mounting to most surfaces
    • Provides flexible mounting?either horizontally or vertically


  • Semiconductor Processing
    • Gas delivery lines
    • Pump foreline
    • Pump exhaust lines
  • Life Sciences
    • Laboratory equipment
    • Medical equipment


Choose product to view specifications


Two thermocouple inputs - process temperature control and safety limit
Process temperature output - 10A ARC-LESS relay
Safety limit alarm - 10A relay
High/low temperature alert - 2A 30V ~ (ac/dc), Form A (single pole, normally open contact)
On-off temperature controller algorithm, upgraded via communications to PID algorithm (min. cycle time 30 seconds)
Standard Connectors:
Controllers are integral to the heater and are supplied by EBARA
Isolated universal power supply 85 to 264V ~(ac), 50/60Hz
Up to 2400 W with 10A switching capability
10A switching
4.5 million cycles expected life