Ultrasonic heat meter 1. Communication mode: infrared, M-BUS, RS-485 2.Degree of protection: IP67 3. Accuracy class: Class 2 ... °CThermal units: GJ, MJ, KWH optionalCommunication mode: infrared, M-BUS, RS-485Degree of protection: IP67Accuracy class: Class 2 or 3Flowmeter accuracy ...