... cover 11,Parameter labels4,Header casing 12,Photoelectrlc interface5,Battery and holder 13,M-BUS module6,Temperature sensor 14, ... corrosion resistance,andimproved the long-term reliability and stability.(3)The features of flow tube:Full straight-through design ... measurement °C 0-130Temperature difference K 3-80Temperature accuracy °C <0.1Cable length m <3 Meter-head showsCumulative calories MW.h ...