Level Gauge Ultrasonic Drum Capacity 55 gal. Connection Size 3/4 in NPS and 2 in NPT Bushing Material Polybutylene Terephthalate Assembly Nut Material Polybutylene Terephthalate Material Polybutylene Terephthalate Operating Temp 0 Degrees to 120 Degrees F Temp Range 0 Degrees to 120 Degrees F For Use With 55 30 15 Gallon Drums Special Features Red LED Low Level Warning Light Line Powered (18-26 VDC Needed) Includes 3/4 in NPS Adapter 3 ft Cable for 4/20mA Signal