... ,centralized recorder can show the all data of gas meters in system at any time.4,one ... :low 5 digits show the volume of using gas,from right to left is one,ten hundred, ... ,the space of data transmission:centralized recorder to gas meter≥300m,centralized recorder to computer≥1000m4,standard: ... supply:DC12V±10%6,passive direct read type gas meter input electric current≤10mm Centralized recorder input ...