Thermal Air Flow Switch

Changes in flow velocity directly affect the extent to which heat dissipates and in turn the magnitude of the temperature difference between the rtds.

Thermal air flow switch. The general purpose gas flow switch is a great choice for a broad range of relatively clean gases with non coating characteristics. Fci flow switches feature thermal dispersion technology in which the temperature difference is greatest in a no flow condition and decreases as flow increases cooling the heated rtd. The 1a relay provides a reliable switch interface with remote devices such as a plc scada or alarm. The thermal switches are based on convective heat transfer.

Thermal flow switches are sensors with an electrical contact output at a specific flow rate. Paddle flow switches or vane sensors with an electrical contact output are at a specific flow rate. Dwyer models provide a complete system for leak detection and feature a selectable no or nc operation. Applications include proof of boiler flow air conditioning controlling of dampers according to flow and protecting pumps motors and other equipment against low or no flow.

Applications include chillers hot water heaters and liquid transfer systems. The model t21 point flow switch uses a thermal differential technique to measure liquid or gas flow level or interface by sensing changes in the thermal heat transfer characteristics of the media where it is located. A set point is established so when that specific temperature difference is reached the relay changes state. Thermo flotm thermal dispersion air flow switch.

As the flow rate increases the temperature difference between the sensors decreases. A flow switch sometimes referred to as a flow sensor or flow indicator is a device used to monitor the flow rate and pressure of liquids air or other gaseous media through a duct system or loop. Flow flow switches thermal. Commonly manufacturing facilities rely on flow sensors to.

Thermal dispersion flow switches for use with gases fst320 series. One sensor is at the process temperature and the other is being heated by a constant power. Flow sensors flow meters. Dwyer flow switches are economical and reliable.

These switches or sensors can be used to monitor flow over a given period of time or set up to continuously monitor total flow. The fst 320 series thermal dispersion flow switches especially designed for use with gases sense changes in the heat transfer characteristics of the gases. Media examples include nitrogen and scrubber exhaust fumes.