Section 1 Product overview
The Intellical PHC201 series pH probes are digital, combination electrodes that measure the pH of
many types of clean water samples. The probes have a non-refillable, semi-liquid gel-filled electrolyte
and a built-in temperature sensor. Refer to Figure 1.
Note: Do not use the probe to measure the pH of organic solvents, wastewater, samples with many solids or
ultrapure samples of low ionic strength. For best accuracy do not use the probe to measure the pH of very alkaline
samples.
Figure 1 Probe overview
1 Probe soaker bottle with storage solution 4 Reference junction
2 Probe body 5 Glass bulb and temperature sensor
3 Probe soaker bottle holder
Section 2 Specifications
Specifications are subject to change without notice.
Specifications Details
Probe type Digital combination pH probe with non-refillable, semi-liquid gel
electrolyte and built-in temperature sensor
pH range 0 to 14 pH
pH accuracy ±0.02 pH
Reference type Ag/AgCl
Reference junction Ceramic porous pin
Slope –59 mV/pH (85 to 115% at 25 °C (77 °F) per Nernstian theoretical
value)
Isopotential point 0 (±30) mV at 7.0 (±0.5) pH
Sodium (alkalinity) error <20% at pH 14 in 1 M NaCl
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