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Many applications requiring a fixed temperature set point rely on a mechanical thermostat for thermal control. Thermostats have proven, however, to be inadequate for many applications due to long-term reliability issues, such as 100,000 cycle rating and poor temperature control. The SERIES EHG® thermal solution includes a compact temperature control, thermocouple sensor and power switching device integrated into the heater's power cord. The SERIES EHG temperature control and sensor reduces system costs and lasts substantially longer than a conventional thermostat solution.

The evolution of miniature microprocessor technology and Watlow switching technology fostered development of a small, versatile temperature control and thermocouple sensor that is integrated with Watlow silicone rubber heater products. This device senses the temperature via input from a thermocouple strategically placed on the heater mat. The microprocessor is programmed prior to shipment with an application specific set point. This results in quick delivery of a custom, integrated system.


Control/Limit Loops:  1/0
Mounting:  In-line
Max Output:  10A
Phase Configurations:  1
Ambient Operating Range:  0 to 70°C  (32 to 158°F)
Agency Approvals:  UL®
Communication Protocols:  No
Dimensions:  3.75 in. Long (95.25 mm) x 1.85 in. Diameter (47 mm)
Warranty (years):  2
Note: The specifications in the table above are best available values in each category. Not all combinations of these values are available in a single model number.

Features & Benefits:

Features Benefits
Long operational life
  • Improves system reliability
Tight temperature control
  • Ensures process accuracy
Small sensor footprint
  • Fits with almost any heater
  • Responds quickly to temperature changes
  • Controls high watt densities in low mass applications
Reduced system cost
  • A single EHG control can be configured with multiple heaters
Pre-wired, in line control
  • Simplifies installation
  • Two wire power connection
Durable housing with built-in strain relief
  • Protects electronics
  • Low risk of mechanical damage
Manufactured with proven Watlow components
  • Assures reliable system performance

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Related Literature

Specification Sheets (1)

Brochures (1)

White Papers (3)

Quality Certificates (1)

Agency Approvals (1)

Catalogs (3)



EHG Integrated Multi-Function
EHG Integrated Multi-Function