Dwyer Instruments TDFS series thermal flow switch uses impulse thermal dispersion measurement to indicate the flow rate. Thermal dispersion measurements offer benefits over traditional flow meters with no paddles or vanes to wear or break. The TDFS features set point flow rates that are field adjustable. It provides NO and NC NPN outputs and two LEDs, for high and low set point indication.
Long-term reliability
High life expectancy
Not affected by empty pipe detection
Field adjustable set points
LED status indicators