The Flowline FT10 / GT10 Thermo-Flo Liquid and Gas Flow Switch provide reliable low or no-flow detection of relatively clean, non-coating media with one 1A relay output. Liquid examples include water and acetic acid. Available in Polypropylene-Ryton® and PVDF, the short flow sensor is used in pipe or ducting from 1/2" to 1½", and the long flow sensor is used in 2" and up. The flow switch set point may be adjusted from 0.04 to 3 fps in liquids, or 1 to 90 fps in gases as a low-flow alarm. The flow sensor is best applied in applications with relatively constant temperature.

The FT10 liquid range is 0.04 to 3 fps with factory set point of 2 fps. The GT10 gas range is 1 to 90 fps with factory set point of 10 fps. Pressure rating is 150 psi (10 bar) @ 25°C, derated at 1.667 psi per °C above 25°C. Repeatability is ±0.5% of set point with response time of 1 to 10 seconds. Process temperature range is 32 to 140°F (0 to 60°C).

The NEMA4X (IP65) rated enclosure houses a 60VA relay selectable NO or NC via power supply wiring polarity. A solid state sensor is not damaged by over-ranging flow velocities. LED indicates flow or no-flow status. It is ideal for monitoring chemical feed pumps and for flow/no-flow conditions.