Orion 927006 Glass ATC Probe with 3.5mm Phono Tip Connector, 12 x 8mm, 0 to 14 pH Probe detects temperature in a sample and adjusts the pH reading accordingly for a more accurate reading Temperature accuracy is +/-2 degrees C Glass body resists corrosive materials and solvents Operates in temperatures from 0 to 100 degrees C (32 to 212 degrees F) and pH from 0 to 14 Probe is 8mm in diameter and 120mm long, and has a 1m cable with a connector for attaching to compatible meters