This ORP electrode is for use with the R3000SD data logging meter and has a measurement range of 0-1999 mV. This probe features a 36-inch cable, a 0.5-millimetre diameter, a BNC connector, and a 5.11-inch straight wireway length. It has an epoxy body, a gel reference, a round tip shape, and a 32 Degrees F to 149 Degrees F temperature range.