The SLM series tuning fork level switch level detector has no moving parts and requires no calibration. The HighLow selection feature is available as a standard feature unlike the instruments from other manufacturers. The level switch is insensitive to material build-up and isnt affected by the electrical properties of the service material. You can choose an enclosure depending on you process plant conditions. Features: High Durability No moving parts, no mechanical wear and tear, no maintenance.Fast and Easy Installation Requires no CalibrationFail-safe HighLow Selection Feature Available as Standard Reduces inventory, since the same evaluation unit can be field configuredeither for High or Low Level fail-safe detection.