Fs20d Pointer Type Water Liquid Flow Switch Spst Reed Switch with Indicator. Dual-Media Compatibility: Suitable for both liquid and gaseous media including water, gas, and oil. Field Calibration Capability: Features a switch setting scale allowing users to set parameters without field adjustments. LED Status Display: Equipped with an LED display to indicate switch status and power supply conditions. Material Flexibility: Housing available in stainless steel or aluminum with POM piston and NBR seals. High Pressure Resistance: Withstands up to 100 bar for stainless steel and 50 bar for aluminum versions. IP65 Protection Rating: Offers robust protection against dust and water jets for industrial environments. Minimal Pressure Loss: Designed for economy with average pressure loss of only 0.3 bar at 25L/min. Complete Isolation Design: Mechanical and electronic parts are fully isolated for enhanced safety and reliability.