Portable Conductivity/TDS/Salinity Meter PH-520 PH-530 PH-531 PH-540

PH-520 Features: *1 to 3 points calibration with automatic recognition for conductivity standards. *Automatic electrode diagnosis shows the calibration points and factors . *Selectable cell constant, reference temperature, linear/non-linear and pure water compensation modes. *Automatic temperature compensation ensures accurate readings over the entire range. *Auto-Read function senses and locks the measurement endpoint. *Setup menu allows setting the number of calibration points, temperature unit, auto-power off, etc. *Reset function automatically resumes all settings back to the factory defaults. *Expanded memory stores or recalls up to 100 data sets. *USB communication interface for data transfer orconnecting a power adapter to meter. PH-530/531/540 Features: *1 to 5 points calibration with automatic recognition for conductivity standards. *Automatic electrode diagnosis shows the calibration points and factors. *Selectable cell constant, reference temperature, TDS factor, linear and pure water compensations, seawater and practical salinity measurement modes. *Automatic temperature compensation ensures accurate readings over the entire range. *Auto-Read function senses and locks the measurement endpoint. *Calibration due alarm prompts user to calibrate the meter regularly. *Auto-Power Off effectively conserves battery life. *Setup menu allows setting the number of calibration points, stabilitycriteria,temperature unit, date and time, etc. *Reset function automatically resumes all settings back to the factory defaults. *Expanded memory stores or recalls up to 500 data sets. *USB communication interface is easy to transfer data to PC. *Multi-mode powerscheme (batteries, power adapter and USB port) ensures that using the meter smoothly.