Reflective Ultrasonic Level Sensor For Media Type Chemicals Oil Wastewater Water Antenna Diameter 3 1/2 in Range 471.6 in Connection Size 3 in Connection Type NPT Accuracy +/-0.2 Percent of Range Voltage - Maximum 28V DC Dead Band 18 in Operating Frequency 50 kHz Spatial Resolution 0.196 in Beam Width 6 in Operating Pressure - Maximum 30 psi Media Temperature - Minimum -40 Degrees F Media Temperature - Maximum 176 Degrees F Output Wire Configuration 2-Wire