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Thermal Harvester

KCF Technologies’ Thermal Energy Harvester (TH-1) eliminates the need to change batteries by harvesting electrical energy from the temperature differential between a surface and the surrounding air.

Thermal Harvester

Why Use Thermal Harvesters?

Wireless sensors offer great promise for cost savings and downtime avoidance, but battery replacement can affect the value proposition in locations that are inaccessible or where batteries are precluded. KCF Technologies’ Thermal Energy Harvester (TH-1) provides a reliable solution for these cases. TH-1 eliminates the need to change batteries by harvesting electrical energy from the temperature differential between a surface and the surrounding air. The Thermal Energy Harvester uses a Bismuth Telluride (Bi2Te3) thermoelectric generator and a proprietary heat sink to tolerate harsh industrial environments and reliably harvest energy from temperature differentials as small as 15°F.


  • Industrial machinery that is 15°F above or below ambient temperatures
  • Motors, compressors and generators in the power and process industries
  • Pipes and fluid connectors
  • HVAC equipment, including compressors, chillers, water pumps and pipework, ductwork and fans
  • Machinery in the paper and metal processing industries, including rolling mills


  • Compact 2-inch cube that is robust and suited to industrial applications
  • Low temperature differential operation
  • Integrated harvesting circuitry with battery-like output, extending battery life or eliminating batteries altogether
Dimensions49.9mm x 50.8mm x 48.5mm (1.96in x 2.00in x 1.91in)
Weight182.8g (6.45oz))
  • 18 in and 3 ft options available
  • RG-174 coaxial cable
Operating Temperature-40° to 80°C
Enclosure MaterialAluminum
Output PowerPeak power depends on sensor electrical load and thermal environment
Output Voltage 3.3 Volts (Regulated)
Storage Capacitance9.8mF
Minimum Environmental Energy InputTemperature differential of 15°F (8.33°C)

Harvester Power Generation

Thermal Harvester generates power based on the difference in temperature between the surface that the unit is mounted on and the ambient air temperature. The harvester will generate sufficient energy to power the SmartDiagnostics® sensor nodes with as little as a 15°F temperature gradient. The amount of energy harvested increases with larger temperature differences as shown in the chart below.

Average Harvester Power Generation

Average Harvester Power Generation

Thermal Energy Harvester Mechnical Drawing

Thermal Energy Harvester Mechanical Drawing

Federal Communications Commission Compliance ‒ FCC Class B Device Statement The radio equipment in the SmartDiagnostics Receiver Nodes and SmartDiagnostics Sensor Nodes has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. Hazardous Location Information ‒ The SmartDiagnostics Vibration Sensor Node model SD-VSN-2N is certified to be suitable for use in Class I, Division 2, Groups A,B,C,D or non-hazardous locations only.




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