Greisinger ph transmitter without electrode gphu 014 mpcinchbnc greisinger gphu 14 the greisinger gphu 014 mpbnc ph is a high quality ph transmitter designed to provide a standard 4 to 20ma current output which is proportional to the ph being measured its small size and encapsulated construction allow for easy installation and will accommodate any ph electrode with a bnc connector the temperature compensation is either manual or automatic when pt1000 temperature probe is connected this