Fuel Level Sensors, Level Switch manufacturer / supplier in China, offering NPT 1/2" Thread Water Fuel Oil Tank Stainless Steel 304 SUS316 Low Level Alarm Switch, Side-Mounted Dual-Float Polypropylene Water Level Switch for Humidifier, Dispenser, Ultrasonic Appliances, Air Purifier, Thread-in Type Premium Pipeline Water Flow Switch with Floatless for Swimming Equipment/Central Air Conditioning and so on.