Wärmezähler Resideo US WMZ QP2.5 - PN16 DN20 - M-BUS EW7731M2000

This is a heat meter from Resideo, model EW7731M2000 US WMZ. It has a nominal flow rate of QP2.5, pressure rating PN16, and connection size DN20. Communication is via M-BUS protocol.