The MW100 is a compact pH, ORP and Temperature Portable Meter with a Fast Micro Processor. This handy and ergonomically designed portable meter is ideal for anyone working on a low budget and still requires fast and reliable measurements. This portable meeter is suitable for a wide range of applications, such as Educational, Agriculture and Horticulture as well as water and environmental analysis. This easier and faster-to-calibrate portable meter has a smaller, ergonomic and ligther case design. Other features include 100-percent larger and easier to read LED Display and long battery life. Meter is supplised with pH electrode and calibration instructions.MW100 performs pH measurements with a 0.1pH resolution and with manual temperature compensation. Supplied complete with a MA911B/1 pH electrode, pH 7.01 20mL sachet of calibration solution, calibration screwdriver, 9V battery and instructions.Specifications: Range 0.0 to 14.0 pH, Resolution - 0.1 pH, Temperature Compensation - manual, 0 to 50 degrees Celsius, Calibration - manual, 2-point through offset and slope trimmers, pH Electrode - MA911B/1 (included), Battery Type - 1 x 9V alkaline (included), Battery Life - approximately 300 hours of use, Weight - 220g with Battery, Dimensions - 145 by 80 by 40 mm.