2 electrode combination and 3 electrode differential pH sensors
The most common method of measuring pH is to use an electrochemical pH sensor. Combination pH sensors are a type of electrochemical pH sensor that features both a measuring electrode and a reference electrode. The measuring electrode detects changes in the pH value, while the reference provides a stable signal for comparison. A high impedance device, known as a pH meter, is used to display the millivolt signal in pH units.
Compared with a typical combination pH probe, differential pH sensors work slightly differently. While combination pH sensors have two electrodes, a measuring, and a reference electrode, differential pH sensors have three electrodes. In the differential design, two electrodes measure pH differentially with respect to a third metal ground electrode. This design has the advantage of preventing reference fouling, making it ideal for industrial applications like wet scrubbers.
| Model Number | Description | Price |
|---|---|---|
| P72D | pH Sensor, Combination, Double Junction, 1/2 MNPT, KNO3 Gel | $375 |
| P72LC | pH Sensor, Combination, Double Junction, 1/2" MNPT Low Cond | $399 |
| P72S | pH Sensor, Combination, Single Junction, 1/2" MNPT, KCL Gel | $356.5 |
| P72F | pH Sensor, Combination, Double Junction, 1/2" MNPT, Flat Tip, HD | $473 |
| P74SR | pH Sensor, Combination, Single Junction, 3/4" MNPT, KCL Gel | $356.5 |
| P74DR | pH Sensor, Combination, Double Junction,?3/4" MNPT, KNO3 Gel | $375 |
| P74CR | pH Sensor, Combination,Double Junction, 3/4" MNPT Low Cond | Call for Pricing |
| P74FR | pH Sensor, Combination, Double Junction, 3/4" MNPT, Flat Tip, HD | $473 |
| DA650CD | pH Sensor, Diff Amp, Submersion | $435.25 |
| DA650CDHF | pH Sensor, Diff Amp, Submersion, HF | $465.25 |
| DA651CD | pH Sensor, Diff Amp, Submersion, HT | $416 |
| DA651CDHF | pH Sensor, Diff Amp, HT, Submersion, HF | $452.25 |
| DA651CD-KNO3 | pH Sensor, Diff Amp, Submersion, HT,KNO3 | Call for Pricing |
| DA660CD | pH Sensor, Diff Amp, for 3/4" | $422.25 |
| DA661CD | pH Sensor, Diff Amp, for 1" | Call for Pricing |
| DA662CD | pH Sensor, Diff Amp, for 2" | $489.75 |
| DA660CDHF | pH Sensor, Diff Amp, 3/4", HF | $452.25 |
| DA661CDHF | pH Sensor, Diff Amp, for 1", HF | Call for Pricing |
| DA662CDHF | pH Sensor, Diff Amp, for 2", HF | Call for Pricing |
| DA660CD-LC | pH Sensor, Diff Amp, 3/4", LC | Call for Pricing |
| PH2100 | Comb pH Sensor, 39" (1M), Clear BTD BNC | $151.25 |
| PH2200 | pH Sensor w/Piercing Tip, Clear BTD BNC | $131.5 |
| S1021CD | pH Sensor, pHASE,12mm,Polymer,Refillable | $283.5 |
| S450C | pH Sensor, Flat, 15mm, Polymer | $118 |
| S450CD | pH Sensor, Flat, 15mm, Polymer, DJ | $148.9 |
| S651CD | pH Sensor, Flat, CPVC, HT, Submersion | $196 |
| S656CD | pH Sensor, Flat, CPVC, for Insertion | $206 |