Process pH Electrode Selection Guide From Sensorex


Sensorex - Process pH Electrode Selection Guide

The following selection table is provided as quick reference for process pH electrode and ORP electrode selection.

Application

Low Cost

Flat Surface, Self Cleaning

Standard use

S200C, S222CD S260CD,S261CD

All models Flat-surface, self-cleaning

Slurry applications

Not available. See next column.

All models Flat-surface, self-cleaning

Viscous materials

Not available. See next column.

All models Flat-surface, self-cleaning

Low Ionic conditions

970070- low ionic version of S200CD

970xxx customer number. Available in all models. Contact Sensorex for part numbers

970xxx customer number.
Available in all models
970267 for submersion pH (CPVC)
970062 for by-pass pH (CPVC)
970130 for insertion/wet tap pH (CPVC)
970130-ORP for insertion/wet tap ORP (CPVC)
970168 for in-line (3/4") pH (CPVC)
970603 for in-line (1") pH (CPVC)

Temperature above 160 F

970204 high temp version of S200CD

Also available in all other models contact Sensorex for part numbers

 

for in-line models S660CD, S661CD, S662CD and ORP versions.

Other mounting styles require 970xxx customer number:
970206 for side-stream (CPVC)
970293 for side-stream (PVDF)
970211 for submersion (CPVC)
970212 for submersion ORP (CPVC)
970351 for submersion pH (PVDF)
970213 for insertion pH (CPVC)
970214 for insertion-ORP (CPVC)
970291 for insertion pH (PVDF)
970291-ORP for insertion ORP (CPVC)

HF (hydrofluoric acid)

Not available. See next column

Add HF to end of part number
example: Submersion model S650CD becomes S650CDHF

Ground loop problems

Not available. See next column

See Ground Loop Interrupt Electrodes

Etchants
(nickel Sulfamate,..)

Not available. See next column

Silica based reference gel use 970XXX numbers:
970090 for by-pass ORP (CPVC)
970621 for by-pass ORP (PVDF)
970643-ORP for submersion ORP

Mixed water and solvents

Not available. See next column

KYNAR versions of electrodes –See Flat Surface, Self-Cleaning pH and ORP Electrodes

Horizontal or upside down mounting

Not available. See next column

Standard for insertion model (S655CD,S655KD)
Not available in submersion mount
970XXX numbers for other mounting styles:
970229 for in-line 3/4" (CPVC)
contact Sensorex for models not listed

Heavy metals in sample (Cd, Zn,…)

S200C, S222CD

S260CD,S261CD

All models
See Flat-surface, self-cleaning

Water, oil mixtures

Not available. See next column

S645CD and FC60C (accelerates sample past sensor faster to prevent oil build-up and fouling)

Liquids containing dissolved gases

Not available. See next column

See Horizontal Mounting above (reduces penetration of dissolved gases into electrode)

High pH (up to pH 14)

S200C,… all models

All Models
See Flat-surface, self-cleaning

Low pH <2

S200C,…..

All models
See Flat-surface, self-cleaning

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