Dwyer TUF-1500 is an Ultrasonic Energy Meter with an ambient temperature range of 41 to 131°F and a process temperature range of 36 to 203°F. It offers high accuracy in measuring BTUs and flow, with temperature accuracy of ±0.1°C. It can be powered by 24VDC/VAC or a lithium metal battery as a backup. The meter has an IP65 enclosure rating and is made of plastic. It supports Modbus® RTU or BACnet MSTP communication protocols. Mounting orientations can be horizontal or vertical. The wetted material is Brass and 316L SS. It has a pressure limit of 232 psi for DN15 to DN40 and 362 psi for >DN50. The flow direction is unidirectional and it has a low pressure drop of <1.5 psi.