These instruments are designed for all applications. Its' IP67 Waterproof casing and double junction (for pH) replaceable electrode make them suitable also for heavy duty applications, such as Waste Water treatment and Agriculture.The modular design allows easy electrode and battery replacement.Manual calibration on the pH55 model prolongs the battery life up to 300 hours.All Waterproof testers are supplied in a leather casing complete with calibration solution, batteries, instruction manual and screwdriver for calibration.Specifications:- Range: -2.0 - 16.0 pH- Resolution: 0.1 pH- Accuracy: +/- 0.1 pH- Calibration: Automatic, 1 or 2 points with 2 sets of memorized buffers.- Automatic temperature compensation from -5 to 60C- Electrode: Replaceable Mi56P- Battery Life: 300 hours of continuous use- Battery Type: 4 x 1.5V
