This Thermo Scientific Orion Star A322 Conductivity Portable Meter is the top choice for testing samples anywhere. It is rugged and dependable, making it ideal for every sample, every day, everywhere. It features a large, backlit graphic LCD display. The informative display shows conductivity, TDS, salinity, resistivity, and temperature along with electrode status, time, date, sample ID, user ID and calibration points. Advanced features such as stability and averaging options provide additional options allowing for laboratory accuracy everywhere you need it. It provides ease of use with its plain language screen prompts, soft keys that update for easy selection, and a multi-language interface that supports English, Spanish, French, Italian, German, and Chinese. The AUTO-READ™ feature locks in the stable reading on your screen. The ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals. Selectable cell constant allows for use with 2- or 4-cell conductivity cells. For advanced accuracy, selectable reading reference temperatures of 5°, 10°, 15°, 20° or 25°C with linear, non-linear, nLFu or EP curve options. Choice of practical salinity or natural sea water curves for salinity readings. Linear or ISO/EN 27888 curves for TDS. The non-volatile memory holds up to 5000 data points with time and date stamp. Easily transfer data and keep meter software up-to-date with the USB and RS232 ports and complimentary data analysis software. Four AA batteries (included) provide over 800 hours of operation or purchase the universal power adapter (sold separately) to use AC power. Perfectly portable, waterproof and protected to take anywhere with an IP67-rated housing. Three year meter replacement warranty. Certifications: CE, TUV, FCC Class A limits. Temperature Range (CENTIGRADE): 23° to 221°F (-5° to 105°C). Temperature Resolution (CENTIGRADE): 0.1. Temperature Relative Accuracy (CENTIGRADE): ±0.1. Inputs: 8-pin mini-DIN. Sensor Types: 2- Or 4-Cell. Data Management: 2000 Points With Date/Time Stamp. Output: RS-232, USB. Display: Graphic LCD; Simultaneous Display Of Measurement, Temperature, Date/Time, Sample ID, User ID, And More. Power Supply: Four „AA” Batteries Or Optional Universal AC Line Voltage. Environmental Operating Conditions-Relative Humidity: 5 To 85% Noncondensing. Thermo Scientific Orion #: STARA3220.