Specification :

The 3150 pH meter is designed to resist the harshest of field,
laboratory and industrial environments. The instrument is fully menu
driven via a sealed membrane keypad, with all results being
displayed simultaneously on the large display.
The pH sensor of the 3150 incorporates a precision temperature
element configured to give accurate temperature compensation, as
well as a direct readout of temperature in ° C or ° F .
Through the use of data logging protocols the 3150 automatically
stores up to 100 results in its memory ensuring all results are saved,
even in the event of battery failure.