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pH/ORP

pH / ORP > Sensor > F235
Model F235

Fermprobe® Sterilizable pH Elecrode

These electrodes are sealed, gel-filled, sterilizable, autoclavable designs with built-in temperature elements. This allows for the automatic compensation of Nernstian temperature effects in processes with wide pH ranges and significant temperature shifts The VarioPin connector allows for a multiple connection; both pH signal and temperature signal in the same wiring harness. The temperature element is either a PT100 or PT1000 Platinum Resistance Device, which are both compatible with the majority of commercially available instruments. The unique construction methods used allow this electrode to operate under pressures of up to 10bar (150psig) and temperature up to 135°C.
Features
  • Integrated Temperature element for Nernstian temperature compensation
  • Double-Junction Silver/Silver Chloride reference element for the ultimate in stability and resistance to contamination
  • Specifically designed for multiple SIP, CIP, or Autoclave cycles. Withstands exposure to harsh CIP solutions
  • Metric threaded cap is compatible with a wide range of bioprocess electrode housings
  • Rugged, low-impedance pH bulb provides fast and precise pH measurements even after prolonged steam exposure

Operational:

pH Range
0 - 13 pH
Temperature Range
0 - 135°C
Temperature Range
32 - 275°F
Pressure Range
0 - 150 psig
Pressure Range
0 - 10 bar
Temperature Sensor Range
0 - 100°C
Choose Electrode Model
If the electrode needs to fit an existing cable, check cable connector. If it has a multipin connector, an F-235 or F-285 FermProbe is required. Another guideline is to note the connector’s color. If the cable connector is all stainless steel, use the F-235 or F-285 FermProbe. The F-235 and F-285 sensors also have an integrated temperature sensor that can be used for automatic temperature compensation.
Choose Electrode Length
Benchtop Applications
The electrode length is from the base of the cap to the tip of the electrode (the glass part of the electrode).
SIP Tank Applications
If you have already chosen an electrode housing, select an electrode length with the same Class designation as the housing. The housing ordering information box also lists the correct electrode length to order. If you have not already chosen the housing, please review the recommendations next to each electrode model below.
Confirm Cable Length and Connector
Model F-235 pH electrodes require disconnect cable and connector assemblies.

Ordering Information

Model F-235 pH FermProbe with Standard Metric Cap
Electrode Model Use with these housing models or benchtop vessel sizes Temperature sensor type Electrode Length Cable Length Connector Type VP Electrode Part Number
F-235 325, 335 Class D<1L Vessel Pt 100 120 mm Order Separately F-235-D120-VP
Pt 1000 F-235-H120-VP
F-235 325, 335 Class F1-3L Vessel Pt 100 200 mm F-235-D200-VP
Pt 1000 F-235-H200-VP
F-235 3L-5L Vessel Pt 100 225 mm F-235-D225-VP
Pt 1000 F-235-H225-VP
F-235 7L-15L Vessel Pt 100 325mm F-235-D325-VP
Pt 1000 F-235-H325-VP
Note: the vessel sizes are for guidance only – check your own vessel dimensions or the length of the electrode you are replacing.

Dimensions (Inches (mm)):

F235 Dimensions