Greisinger gph 114 ph meter ready to use incl ph electrode and battery greisinger gph114 the b gph 114 b is a handheld ph meter that is supplied with a probe and battery making it ready for use straight out of the box the supplied ge 114 ph electrode gives the ability to take ph measurements of between 0 and 14ph the meter has an easy to read 3 frac12 digit lcd with 13mm digit height there are 3x rotary calibration controls on the unit which will adjust temperature compensation 0 c