Hanna Instruments HI 3222-01 Dual Channel pH/mV/ISE Benchtop Meter, 115V

These Hanna Instruments benchtop metersfeature up to five-point calibration, on-screen calibration instructions, Cal-Check function, capability to log up to 400 samples, and a USB connection to download data. A pH meter is commonly used to measure the pH of substance such as water, food, beer, or wine in lab, industrial, and food applications. A large backlit LCD screen provides graphical instructions for calibration, and the Cal-Check function ensures proper calibration prior to taking a reading. Calibration is five-point, with either seven standard (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) or five custom buffers. A Good Laboratory Practice (GLP) feature displays the last calibration data. A hold feature freezes the display and records results and the meter can log up to 400 samples. The meter has a USB connection for downloading data to Windows.

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, agriculture, 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.

Hanna Instruments manufactures analytical instrumentation and supplies, including pH meters, electrodes, chemical reagents, and buffer solutions. The company, founded in 1978 and headquartered in Woonsocket, RI, meets International Organization for Standardization (ISO) standard 9001.