Ultrasonic Level Sensors use a pulsing sound generator and receiver to read sound echoes between the sensor and liquid level to provide a continous level measurement. Ultrasonic Level Sensors work well in tanks that have a perpendicular unabstructed view directly to the non-turbulant surface of a liquid. Please note that the sensors should never be mounted in the center of a domed top tank. The EchoPod® family is a less expensive sensor designed for smaller tanks. It will generate a 4-20mA signal over its maximum range. The 4-20mA signal can be reduced to cover the height of your tank by programming the sensor off-line with a USB programming FOB and free software from Flowline. The sensor does not have a local display. Accuracy: +/- 2%. Resolution: 0.019". Beam width: 2". Dead band: 4". Supply voltage: 24 VDC (loop). Loop resistance: 400O max. Consumption: 0.5W. Signal output: 4-20 mA, two wire (when loop powered). Signal output: (4) SPST relays 1A. Loop fail-safety: Power loss: hold last, Echo loss: open, close and hold last. Hysteresis: selectable. Configuration: WebCal® PC Windows® USB 2.0. Temp. comp.: Automatic over range. Process Temperature: 20°F to 140°F. Pressure: MWP = 30 psi. Enclosure: Type 6P encapsulated, corrosion resistant & submersible. Enclosure material: polycarbonate. Strain relief material: Santoprene™. Trans. material: PVDF. Cable length: 48". Cable jacket material: polyurethane. Process mount: 1" NPT. Mounting Gasket: Viton™. Classification: General purpose. Approvals: CE. Compliance: RoHS.