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Home > Thermatel® Model TG1/TG2 Thermatel Thermal Dispersion Switch
 Thermatel® Model TG1/TG2 Thermatel Thermal Dispersion Switch   Printer Friendly Version
Thermatel TG1/TG2 provides a two-wire, intrinsically safe circuit between the probe and remote din rail enclosure. The flow/level/interface switches provide a new level of performance and reliability not found in previous switches. Continuous diagnostics with fault indication, temperature compensation, narrow hysteresis and fast response time make the TG1/TG2 the latest in thermal dispersion switch technology.
Operating Principle Features Options Downloads Approvals
 
The Thermatel sensor consists of two RTD elements. One is the reference and the second is heated to a temperature above the process temperature. The electronics detect the temperature difference between the two elements. The temperature difference is greatest in air, then decreases when cooling occurs due to a change in media. An increase in the flow rate further decreases the temperature difference.

The set point is adjusted for the switch to alarm at the desired temperature difference. Once the set point is reached, the relay will change state.

 

  • LED's provide visual flow indication
  • 24 VDC input power
  • Non-linear mA output signal can be used for trending, diagnostics and repeatable flow/level indication
  • Adjustable set point and time delay
  • SPDT Alarm relay
  • Continuous diagnostics detect sensor fault
   

  • Low flow body for very low flow rate detection
  • Hot tap retractable probe
  • Hygienic design
  • NACE construction
  • Low flow body for very low flow detection
 
 Literature: (UK English)
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  • ELV   
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  • IS   

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  • YES   
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    XP = Explosion Proof  •  IS = Intrinsically Safe  •  NI = Non-Incendive  •  NS = Non-Sparking  •  ELV = EMC/Low Voltage