The HH57ZC001 is an enthalpy sensor, also known as a return air sensor, manufactured by CARRIER. With its 24-36 VDC power supply and a span range of 0-50 BTU/LB, it ensures accurate and efficient measurement of enthalpy. Its 1-20mA output provides reliable data for HVAC systems. Designed for easy installation and secure operation, it provides peace of mind.