The Hydrolab pH sensor uses glass bulb and refillable reference electrode for reliable data from a sensor that is easily maintained and long-lasting.

• KCl impregnated glass bulb is permeable to hydrogen ions; reference filled with 3M KCl and has a porous Teflon junction. Salt bridge is formed between the two, and a potential is measured.
• Choice of standard or integrated refillable reference
• A special low ionic strength reference electrode is available for measuring waters with conductivities below 200 ?S
• Optionally paired with ORP sensor

• Reference electrode is easily refilled in seconds – independent of the pH sensor
• pH sensor does not need replacement when reference electrode is depleted; simply refill the reference

Range:
0 to 14 pH units
Accuracy:
+/- 0.2 units
Resolution: 
0.01 units