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Extech Digital Display Digital Thermometer Multimeter

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Built-in stirrer with 30-, 60-, and 120-minute timer or continuous operation
Large backlit dual LCD simultaneously displays measurement and temperature
2- or 3-point pH calibration for better accuracy (4, 7, and 10pH)

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Measure pH, mV, and temperature. Built in stirrer with 30,60, and 120 minute timer or continuous function. Manual store and recall 150 readings and transfer them to a pc via USB. Complete with pH glass electrode, pH calibration solutions (4 and 7pH), temperature probe, electrode clamp and rod, software and USB cable, AC adapter and stirrer; WQ510/WQ530 also include conductivity cell, conductivity calibration solutions (1413µS and 12.88mS); WQ530 also includes DO probe, plastic Lurette, polishing paper, 4 membrane caps and DO internal fill solution (30 mL).

Built-in stirrer with 30-, 60-, and 120-minute timer or continuous operation
Large backlit dual LCD simultaneously displays measurement and temperature
2- or 3-point pH calibration for better accuracy (4, 7, and 10pH)
Manual salinity (0 - 50-ppt) and altitude (0-20K ft) compensation for DO measurements
1-point conductivity calibration - automatically recognizes 4 calibration solutions
Adjustable conductivity to TDS ratio from 0.5 to 1.0
Automatic temperature compensation
Memory stores up to 150 readings
Complete with pH, conductivity and DO probes and calibration/fill solutions, temperature probe, electrode clamp and rod, software, and USB cable and AC adapter