Check the listing for details. EXTECH PH110 pH Meter,WaterProof,Refillable 3UNV4. Condition: New. Listed at 198.39 USD. pH Meter,WaterProof,Refillable, pH Range 0.00 to 14.00, Waterproof Yes, Automatic Temperature Compensation Yes, Displayed Temperature Range 23 to 194 Degrees F, -5 to 90 Degrees C, Auto Power Off Yes, Calibration 1, 2 or 3 pt., Includes Protective Sensor Cap, Sample Cup With Cap, Batteries, Neckstrap, And Instructions, Manufacturers Warranty Length 1 Year Meter; 6 Months Electrode Now you can test pH on the spot easily and accurately with The Extech(R) by FLIR ExStik(R) Waterproof pH Meter. The durable ExStik(R) meter features a flat surface refillable electrode for measuring pH in liquids, semi-solids, and solids - no more electrode breakage or clogged junctions. Since you can refill the ExStik(R) quickly, you won't need to worry about the shelf life of its electrode. The ExStik(R) meter.