Electrochemical measurements, including those taken using pH probes, Oxidation/Reduction Potential (ORP) probes, Ion Selective Electrodes (ISEs), and Electrolytic Conductance (EC) probes, primarily rely on potentiometry. In potentiometric measurements, the probe detects a potential in millivolts (mV), which can be directly reported as the measurement result (as with ORP), or used to calculate the final result through a calibration process (as with pH and ISE).
The mV reading in electrochemical measurements can be affected by several factors, with the reference system being particularly important. To address any variations in mV measurements due to differences in reference systems, the potential is often reported with respect to the Standard Hydrogen Electrode (SHE), which is the standard against which all other reference systems are compared. Even if all other variables are constant and two probes are reading identically to theoretical, an identical sample would give different mV readings on different probes with different reference systems. If the potential vs. SHE for two probes with different reference systems is known, the mV results can be compared on the same relative scale. Additionally, if the potential vs. SHE is known for a probe and the mV reading on a standard with SHE is also known, the probe's reading on that same standard can be easily calculated.
The mV reading in electrochemical measurements can be affected by several factors, with the reference system being particularly important. To address any variations in mV measurements due to differences in reference systems, the potential is often reported with respect to the Standard Hydrogen Electrode (SHE), which is the standard against which all other reference systems are compared. Even if all other variables are constant and two probes are reading identically to theoretical, an identical sample would give different mV readings on different probes with different reference systems. If the potential vs. SHE for two probes with different reference systems is known, the mV results can be compared on the same relative scale. Additionally, if the potential vs. SHE is known for a probe and the mV reading on a standard with SHE is also known, the probe's reading on that same standard can be easily calculated.

Glass reference electrode, refillable, Ag/AgCl, 12x120mm
QM710X
Epoxy reference electrode, refillable, Ag/AgCl, 12x120mm
QM711X
Epoxy gel reference electrode, Ag/AgCl, 12x120mm
QM711X-GEL
Epoxy refillable reference electrode, Double Junction Calomel, 12x120mm
QM712X
Epoxy refillable reference electrode, Double Junction Calomel, 8x100mm
QM712X-8X100M
Glass refillable reference electrode, Double Junction Ag/AgCl, 12x120mm
QM713X
Glass refillable reference electrode, Double Junction Ag/AgCl, 8x100mm
QM713X-8X100MM
Epoxy refillable reference electrode, Double Junction Ag/AgCl, 12x120mm
QM714X
Glass tube, Ceramic Frit, 12x100mm
QM715X-12X100-CF
Tube, Glass, Ø12mm x 120mm, PTFE Junction
QM715X-12X120-PTFE
Luggin Haber Glass, Ceramic Frit, OD 2mm, 120mm/90°/15mm
QM715X-2X120-90-15
Glass tube, Ceramic Frit, 4x100mm
QM715X-4X100-CF
Luggin Haber Glass, Ceramic Frit, OD 4mm, 120mm/90°/15mm
QM715X-4X120-90-15
Glass tube, Ceramic Frit, 4x50mm
QM715X-4X50-CF
Glass tube, Ceramic Frit, 6x100mm
QM715X-6X100-CF
Glass tube, Ceramic Frit, 6x60mm
QM715X-6X60-CF
Glass tube, Ceramic Frit, 8x100mm
QM715X-8X100-CF
Glass refillable reference electrode, Ag/AgCl, 6x50mm
QM716X
Glass refillable reference electrode, Ag/AgCl, 1,5x100mm
QM716X-1-5X100
Glass refillable reference electrode, Ag/AgCl, 6x100mm
QM716X-6x100MM