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.
![Gems FS-926 Series [26951] Flow Switch Stainless Steel, Flow Setting 50 cc/min (0.013 gpm)](image/cache/wp/gj/Products/Gems_FS-926-SS-200x200.webp "Gems FS-926 Series [26951] Flow Switch Stainless Steel, Flow Setting 50 cc/min (0.013 gpm)")
![Gems FS-926 Series [26938] Flow Switch Brass, Flow Setting 0.013 GPM (50 cc/min)](image/cache/wp/gj/Products/Gems_FS-926-Series-200x200.webp "Gems FS-926 Series [26938] Flow Switch Brass, Flow Setting 0.013 GPM (50 cc/min)")
![Gems FS-550 Series [29609] Flow Switch Paddle Type, Brass, 1" NPT Male](image/cache/wp/gj/Products/Gems_FS-550-Series-long-200x200.webp "Gems FS-550 Series [29609] Flow Switch Paddle Type, Brass, 1\" NPT Male")
![Gems FS-550 Series [30641] Flow Switch Paddle Type, Brass, 1" NPT Male](image/cache/wp/gj/Products/Gems_FS-550-Series-200x200.webp "Gems FS-550 Series [30641] Flow Switch Paddle Type, Brass, 1\" NPT Male")
![Gems FS-600 Series [230500-1-5] Flow Switch 1/2" NPT Female](image/cache/wp/gj/Products/Gems_FS-600-Series-200x200.webp "Gems FS-600 Series [230500-1-5] Flow Switch 1/2\" NPT Female")
![Flowline LC80 [LC80-1001] Relay Controller, One Sensor, 240 VAC](image/cache/wp/gj/Products/Flowline_LC80-200x200.webp "Flowline LC80 [LC80-1001] Relay Controller, One Sensor, 240 VAC")
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