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pH meter Pocket Model : pH Pro Specifications Model: Senz pH Pro Range: 0.00 to 14.00 pH Resolution: 0.01 pH Accuracy: ± 0.05 pH Calibration: One-touch for 2 point calibration Battery Type: 4 x 1.5V button cell ( Alkaline A76 or equivalent) Battery Life: Approx. 150 hours Automatic Shut-off: Approx. 15 minutes Automatic Temperature Compensation: 0 to 70° C Operating Temperature: 0 to 50° C or 32 to 122° F Product Life 365 tests or about 1 year, whichever earlier Packaging Dimension Size ( LxWxH) : 185mm x 65mm x 25mm Packaging Weight: Approx. 135gm Product Dimension Size ( LxWxH) : 170mm x 32mm x 15mm Product Weight: Approx. 70gm