Thermatel TG1/TG2 flow/level/interface switches with din rail

Downloads

Thermatel® TG1/TG2 flow/level/interface switches with din rail

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, narrow hysteresis and fast response time make the TG1/TG2 the latest in thermal dispersion switch technology.

Thermal dispersion switch

Technology

The thermal switches are based on convective heat transfer. One sensor is at the process temperature and the other is being heated by a constant power. As the flow rate increases, the temperature difference between the sensors decreases. A set point is established so when that specific temperature difference is reached the relay changes state. This can be on either increasing or decreasing flow or flow/no flow. When used in a level or interface application it is primarily the thermal conductivity of the fluid that will provide the difference in heat transfer.

  • Easy field calibration – pre-calibration fro factory on request
  • Variable flow or flow / no flow detection of gases and liquids
  • Excellent low flow sensitivity
  • Continuous diagnostics detect sensor fault
  • mA output provides repeatable indication of flow rate and fault detection
  • Process conditions up to +850 °F (+450 °C) and 6000 psi (413 bar)

Options

  • Low flow body for very low flow rate detection
  • Hygienic design
  • NACE construction
Chemical
  • Chemical injection
  • Chemical injection skids
  • Chlor-alkali process
  • Liquid-Liquid extraction
  • Scrubber vessels
  • Tank blanketing
  • Tank blanketing in oil & gas field processing
Common applications
  • Flow: Air flow
  • Flow: Gas mixtures flow
Crude oil
  • Chemical injection
  • Tank blanketing
Natural gas
  • Chemical injection
  • Chemical injection skids
Nuclear power
  • Cooling tower intake & basin levels
Petroleum refining
  • Refinery flow applications
Power generation
  • Condensate receiver tanks
  • Cooling tower intake & basin levels
Pulp & paper
  • Black, green & white liquor
  • Condensate receiver tanks
  • Digester blow tanks
  • MC pump standpipes
  • Mixing & machine chests
  • Pulp bleaching towers
  • Pulp digesters
  • Pulp washing systems
  • Turpentine Recovery
Renewable energy
  • Wind
Water & wastewater
  • Blower air flow
  • Carbon slurry level
  • Digester gas flow

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.

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.

ATEX Ex ia
EAC (GOST) Ex ia
SIL SIL 1 (1oo1)

Other approvals are available.

+ Features
  • Easy field calibration – pre-calibration fro factory on request
  • Variable flow or flow / no flow detection of gases and liquids
  • Excellent low flow sensitivity
  • Continuous diagnostics detect sensor fault
  • mA output provides repeatable indication of flow rate and fault detection
  • Process conditions up to +850 °F (+450 °C) and 6000 psi (413 bar)

Options

  • Low flow body for very low flow rate detection
  • Hygienic design
  • NACE construction
+ Applications
Chemical
  • Chemical injection
  • Chemical injection skids
  • Chlor-alkali process
  • Liquid-Liquid extraction
  • Scrubber vessels
  • Tank blanketing
  • Tank blanketing in oil & gas field processing
Common applications
  • Flow: Air flow
  • Flow: Gas mixtures flow
Crude oil
  • Chemical injection
  • Tank blanketing
Natural gas
  • Chemical injection
  • Chemical injection skids
Nuclear power
  • Cooling tower intake & basin levels
Petroleum refining
  • Refinery flow applications
Power generation
  • Condensate receiver tanks
  • Cooling tower intake & basin levels
Pulp & paper
  • Black, green & white liquor
  • Condensate receiver tanks
  • Digester blow tanks
  • MC pump standpipes
  • Mixing & machine chests
  • Pulp bleaching towers
  • Pulp digesters
  • Pulp washing systems
  • Turpentine Recovery
Renewable energy
  • Wind
Water & wastewater
  • Blower air flow
  • Carbon slurry level
  • Digester gas flow
+ Operating principle

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.

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.

+ Approvals
ATEX Ex ia
EAC (GOST) Ex ia
SIL SIL 1 (1oo1)

Other approvals are available.

JOLAC ENGINEERING SDN BHD (“JOLAC”) was incorporated as private limited company in Kuala Lumpur, Malaysia under the Companies Act 1965 on 16th December 1982.