"Sper Scientific"

Easy to carry, simple to operate and sufficient for most field pH tests.

Reads either pH (in 0.01 resolution) or mV in large digits, with time, date, and temperature (in °C or °F) shown simultaneously on the lower display.

Reads pH, ORP (oxygen reduction potential), mV, conductivity, TDS (total dissolved solids), salinity and temperature.

Fits standard test tubes 16×50 mm or larger.

Fits standard test tubes 16x50 mm or larger.