Brand: Gems Model: FS-500 Operating voltage: 125/250 (V) Overload current: 10 (A) Certification: CE FS-500 series, low-cost plastic pipe threaded connection system flow settings: 0.25GPM to 5.0GPM Interface : 3/4 NPT Primary Construction Material: Polypropylene Setting Type: Fixed FS-500 series is a low-cost traffic monitoring products, with many switching points and their pressure loss. The switch is all wetted parts are polypropylene or stainless steel, which can meet most of the chemical and temperature requirements. These materials have passed the NSF or FDA approved, it can be applied to drinking water, including chlorination, purifiers and heaters. FS-500 series is the ideal choice for cooling equipment, including welding machines, lasers. Standard junction box, built 5A relays to control higher loads, such as chlorine pumps.