The Milwaukee Instruments pH600 is a compact pH tester with a narrow probe for use in small samples or test tubes, and has manual two-point calibration, a single-line LCD screen, a replaceable electrode, and a low power demand. A pH meter is commonly used to measure the pH of substance such as water, food, beer, or wine in laboratory, industrial, and food applications. The single-line LCD screen of this meter shows the current measurement. The meter has manual temperature compensation and manual one-point calibration through a trimmer on the top. Three 1.5V button batteries provide approximately 700 hours of use. The meter also comes with a calibration screwdriver and instructions. Specifications pH range0.0 to 14.0pH resolution.1pH accuracy+ or - .1Operating temperature0 to 50 degrees C (32 to 122 degrees F)Operating relative humidity95 percentDimensions150 x 30 x 24mm/5.9 x 1.2 x 0.9 inches (H x W x D)Meter weight85g/3.0oz. H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. A pH meter, also called a sensor or tester, is a device used to measure the acidity or alkalinity of a substance. A pH meter has either a portable or a benchtop body. Many portable meters are handheld devices. Some testers have an internal sensor, and may have a tip and body that fit inside of a container for measurement. A meter is commonly used in many different environments from laboratories to field research and manufacturing facilities. Researchers, manufacturers, and hobbyists use a pH meter in aquaculture, agricultural, wine-making, and water-testing, and for scientific applications. Some pH meters may measure additional parameters such as dissolved oxygen (DO), conductivity (also called electro-conductivity or EC), temperature, total dissolved solids (TDS), salinity, resistivity, or oxygen reduction potential (ORP)/mV.Milwaukee Instruments manufactures electrochemical instrumentation and solutions for water analysis under the Milwaukee and Martini brands. The company, founded in 1998, is headquartered in Rocky Mount, NC.What’s in the Box? ph600 pH testerProtective capCalibration screwdriver1.5V button batteries (3)Instructions