The U1000HM is an ultrasonic clamp on BTU meter for thermal energy that uses ultrasound to measure flow rate and PT100 temperature sensors to measure flow and return temperatures. The U1000HM clamp on BTU meter for thermal energy displays BTU thermal energy rate and totalized BTU thermal energy with pulse output and Modbus communication. Simple to install a clamp on to the pipe, set the pipe diameter and connect the power.