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Honeywell On-Surface Temp Sensors
Honeywell On-Surface Temp Sensors 6655 Series

Honeywell On-Surface Temperature Sensors, 6655 Series, are lower cost thermistor-based sensors that use a compact, low-profile thermostat package. The 6655 series measures temperature accurately on most flat surfaces and pipes in non-condensing applications. With a robust design and ease of installation, no calibration is needed and a wide temperature range of -20ºC to 100ºC allows application flexibility.

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  • Air/surface temperature sensing
  • NTC thermistor output
  • Low cost
  • Low, compact profile
  • Tight interchangeability
  • Enhanced accuracy
  • Enhanced response time
  • Wide operating temperature range
  • Variety of mounting brackets
  • Widely used sensor package footprint
  • Enhanced stability/low drift

  • Water heaters and boilers
  • Industrial ovens and ranges
  • Copier diffuser rollers
  • HVAC compressor or duct temperature sensing
Honeywell 6655 Series products have gained widespread acceptance standard due to their robust design and ease of installation. A variety of mounting brackets provides mounting flexibility.

Temperature sensing type

Thermistor type

Nominal resistance at 25ºC (77ºF)

10,000 Ohm, 12,000 Ohm
Operating temperature range

-20ºC to 110ºC (-4ºF to 230F)
±2.5%, ±7.6%, ±10.0%
BETA (25/85)

3694, 3976
R-T curve

12, 16
Time constant on metal surface

1.5 s
Dissipation constant on metal surface

6.5 m/WºC
Housing material

Mounting method/mechanical interface

(see Figure 1)
Electrical interface/connector type

(see Figure 1)

  • Honeywell Sensing & Control
  • Industrial|Sensing
  • Sensors|Thermal Management