Hanna - Waterproof pH Tester

Hanna Instruments pHep 4 & pHep 5 combine ease-of-use with affordability. Allows for on the spot, accurate pH testing. pH Calibration: automatic, at one or two points with 2 sets of standard buffers. Temperature Compensation: Automatic. Battery Type/Life: (4) 1.5v with BEPS/ approx 300hrs of continuous use; auto-off after 8 minutes of non-use. Temperature Range: -5.0 to 60.0ºC /23.0 to 140.0ºF. Temperature Resolution: 0.1º / 0.1ºF. Temperature Accuracy (@20ºC): ±0.5ºC / ±1ºF.