Single Point Ultrasonic Switch with Self Test Brochures: Form 1145 Electronic Level Switches I/O Manuals: Form 829 Ultrasonic Point Level Switch (One and Two Point), Form 771 Two-wire Ultrasonic Point Level Control No calibration required Pressure from vacuum to 2000 psi, temperature from -40°F to 250°F Relay and current shift (8/16mA) output available 316SS sensor FM, CSA