Thermal Dispersion Flow Switch

Thermal Dispersion Flow Switch

Levcon offers a Thermal Dispersion Flow Switch. The Sensor head employs two temperature sensors with a constant very low power heating source attached to one of the temperature sensors. The second temperature sensor is isolated from the heating source and provides compensation for changing process temperatures. As flow changes, heat gets dispersed from the heated sensor thereby reducing the temperature differential between the two sensors. This change in temperature differential is detected by the Electronics to operate a switch. This allows the device to be used as a flow/no flow sensor. The no moving parts principle of operation assures reliable and repeatable operation. Electronics are available with single or dual switch points.

Usage / Application area:

  • Cooling water pipes in walking beam furnace area in steel plants
  • Cooling water in sinter plant area in steel plants
  • Coke dry cooling plants, lime mud reburning system in paper & pulp industries, etc.

  • Steel Plants
  • Power Plants
  • Petrochemical plants
  • Oil refineries
  • Oil production
  • Water treatment plants
  • Pharmaceutical plants
  • Food and beverage
  • Pulp and paper
  • Power production
  • Gas processing
  • Biotechnology

  • Sensor material: 316/ 316L stainless steel
  • Process connection: ¾” / 1” threaded / flanged
  • Velocity range:
    • 0.01 – 1.5 m/sec (water)
    • 0.03 – 3 m/sec (oil)
  • Temperature: 0 – 80o C, please consult factory for other ranges
  • Pressure: 0 – 30 Kg/cm², please consult factory for other ranges
  • Response Time: 10 seconds approx.
  • Enclosure: Powder coated / Epoxy painted Aluminium / SS
  • Protection: IP 66 / IP 67
  • Power Supply: 24 V DC
  • Output: PNP / NPN o/p, SPDT / DPDT relay
  • Cable Entry: ½” NPT (F)

  • No moving parts
  • Threaded & flanged process connections
  • 304/ 316 Stainless steel sensor
  • Rugged structure
  • Maintenance free for most applications
  • Field programmable
  • Appropriate for low flow rate detection

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