Thermal Flow Switches with an electrical contact output at a specific flow rate.
 | Dwyer Series TSP Liquid Flow Controller. NO or NC Relay Output, Adjustable Time Delay |  | Series TDS Thermal Dispersion Flow Switch. Adjustable Switch Point, LED Indication |
 | Series TDC Remote Flow Controller. Single or Dual Relay Output, Adjustable Time Delay |  | Series TDFS Thermal Dispersion Flow Switch. Non-Mechanical, Low Pressure Drop |