General Purpose pH Electrodes

One year shelf life guaranteed
Spherical bulb or flat models
Sealed, gel-filled no maintenance reference junctions
Compatible with most pH meters, transmitters, and controllers
In-Line or Submersion mountings

These high quality electrodes will provide excellent performance at a price that offers superior value. These electrodes may be used for General Purpose applications. They are provided with the cables fixed and hard-wired to the electrode or with our popular cartridge style connections (series S222).

The General Purpose pH electrodes are available with spherical or flat pH sensitive glass bulb designs. Choose either single or double junction construction.

Fixed Cables with Threaded Body

Sensorex offers a complete line of NPT threaded pH electrodes in PPS bodies easily used for submersion or in-line installation. These rugged pH electrodes (S260 Series) are provided with a molded PPS body that is available with a 1/2" or 3/4" male NPT threads on each end. You may use these electrodes in a standard threaded 1/2" or 3/4" pipe tee, or submerse them into a tank.

The S270 series PPS electrodes feature 3/4" threads and are available for temperatures and pressures up to 100°C and 100 psig (Standard de-rating applies) 10 feet of waterproof coaxial cable is standard. Special cable lengths are available at additional cost. Specify type of connector required at time of order. Optional Automatic Temperature Compensation (ATC) in the S272 series. The PPS body provides excellent corrosion resistance to a wide range of chemicals. Wetted materials include pH glass, HDPE, or Pellon and silicone.


4" PPS Nipple Bodies
Rated 0 - 70 psig (7 bar) up to 80° C

Part # Junction Type Bulb Style
S265C Single 1/2" male NPT Spherical
S265CD Double 1/2" male NPT Spherical
S267C Single 3/4" male NPT Spherical
S267CD Double 3/4" male NPT Spherical
S268CD Double 1/2" male NPT Flat
S269CD Double 3/4" male NPT


5 " PPS Nipple Bodies
Rated 0 - 100 psig (7 bar) up to 100°C

Part # Junction Type Bulb Style
S271CD Double 3/4" male NPT Spherical
S272CD Double 3/4" male NPT Flat
S272CD-ATC Double 3/4" male NPT Flat

Quick Disconnect Cartridge Style Electrodes

Our popular S222 series electrodes are an easy and very economical means of measuring pH in-line use in pipe Tee fittings or submersed into tanks. For in-line use, Sensorex Electrode Glands are designed to be used with the S222C and the S222CD Combination pH/Reference Electrode. Available in 1/2" NPT (FC50P) and 3/4" NPT(FC75P) versions, they can be used at temperatures up to 80°C and pressures as high as 70 psig. The glands are reusable and fit standard threaded pipe Tees.

The gland uses an O-ring seal and has a stainless steel gripper to assure electrode retention. Gland materials contacting the sample are polypropylene and Buna. For the electrodes, materials contacting the sample include epoxy, silicone rubber, nylon, and glass.

With the use of 1/2 inch NPT threads of the S653 Cable Assembly, the quick disconnect S222 electrodes can also be used in Submersion Applications. This configuration reduces maintenance time when the electrode has to be removed for calibration or cleaning. In addition to the S222C electrode, also order the S653 Cable Assembly and specify the required cable length and connector to mate with your pH transmitter or controller.

The S223 and S224 series, popular in Europe, use the S7 DIN CAP and S8 DIN 13.5 CAP. Use your current S6 DIN mating cable or order a cable assembly DIN EL-xx-xx (specify cable length and EC mating end connector) from Sensorex.

Rated 0 - 70 psig (7 bar) up to 80° C

Cartridge Style pH Electrodes

Part # Description Size
S222C pH Electrode
Single Junction
12 mm x 150 mm
1/2" x 6"
S222CD pH Electrode
Double Junction
12 mm x 150 mm
1/2" x 6"


S223C pH Electrode
Single Junction
12 mm x 150 mm DIN CAP S7
1/2" x 6"
S223CD pH Electrode
Double Junction
12 mm x 150 mm DIN CAP S7
1/2" x 6"


S224C pH Electrode
Single Junction
12 mm x 150 mm DIN CAP S7
1/2" x 6"
S224CD pH Electrode
Double Junction
12 mm x 150 mm DIN CAP S7
1/2" x 6"


FC50P Gland Fitting 1/2" male NPT
FC75P Gland Fitting

3/4" male NPT

S653 Cap cable for S222 type 1/2" male NPT


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