Flexible heaters from Watlow are thin, bendable and shaped to fit almost any type of equipment. Heat can be applied to the most complex shapes, geometries, curves and pipes conceivable without sacrificing efficiency or dependability.

Excellent heat transfer results from the heater’s thin design and direct bonding to an application. Flexible heaters provide fast heat-up and cool-down rates, uniform heat distribution and high watt densities.

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Product Description

Product Description

Many applications that require a fixed temperature set point incorporate a mechanical thermostat for thermal control. Thermostats have proven, however, to be inadequate for many applications due to their inability to provide optimum temperature controller and meet long-term reliability requirements, such as a 100,000 cycle rating.

The SERIES EGH® thermal solution includes a compact temperature control, thermocouple sensor and power switching device integrated with the heater’s power cord. The SERIES EHG solution reduces system costs and increases reliability while providing substantially longer life than a conventional thermostat.

The small thermocouple mass provides superior response to changes in process temperature enabling higher watt density silicone rubber heater designs. The integrated, custom set point temperature controller offers a long life span and allows a thermal system design that delivers faster heat up rates and improved accuracy. The SERIES EHG System has been tested to over four million cycles at rated amperage. Depending on the application, Watlow’s power switching design can last up to 40 times longer than a conventional thermostat.



Material Maximum Operating Temperatures Maximum Watt Densities
°F °C W/in2 W/cm2
N/A 158 70 80 12.5
  • UL® recognized to 428°F (220°C) operating temperature
  • Voltage rating: 120 or 240VAC 0 30/+10%, 50/60Hz
  • Watt densities to 80 W/in² (12.5 W/cm²)
  • UL® recognized to 10A max
  • Applications


  • Semiconductor processing
  • Aerospace composite repair
  • Foodservice equipment
  • Freeze protection
  • Life sciences
  • Telecommunications
  • Features & Benefits

    Features & Benefits

    Features Benefits
    Process controller and safety limit in one package
  • Meets UL® 1998 and CE 60730 requirements
  • Eliminates the need for a thermal fuse on a heater
  • Optional display/communications module
  • Allows easy upgrade onto base device
  • Offers low cost field upgrade
  • 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 32°F to 158°F (0°C to 70°C)
  • 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
  • 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
  • Universal power supply
  • Allows an input of 85 to 264VAC, 50/60Hz
  • Provides safe control of up to 2400 watts with 10 amperes switching in both controller and safety limit
  • Can be switched from on-off and PID algorithm
  • Increases product life (on-off control is default)
  • Offers selectable PID control algorithm for tighter temperature uniformity
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