Worldwide Inline Process Control Solutions

Conductivity Sensor ACF60 / pH Electrode Adapter PF12

ACF60 Conductivity Sensor PF12 pH electrode holder

Typical Applications:

  • Chromatography process monitoring
  • Monitoring of CIP processes
  • Measuring ultrapure water

Overview

Conductivity Sensor ACF60

  • Patented six-electrode design reduces sensitivity to fouling and polarization
  • Wide measuring range: 0 - 10 μS/cm up to 0 - 850 mS/cm
  • Integrated Pt1000 temperature sensor
  • No O-rings or epoxy - suitable for CIP/SIP

SIX-Electrodes

The ACF60 conductivity sensor features a superior six-electrode, four-pole design. The patented arrangement of the four current electrodes around the two potential electrodes results in a reliable and precise measurement. This unique design also provides greatly reduced sensitivity to sensor fouling and polarization. The combination of optek C8000 universal converter and ACF60 conductivity sensors allow a wide dynamic range from 0 – 10 μS/cm up to 0 – 850 mS/cm with the same sensor.

Temperature Measurement

The integrated Pt1000 platinum RTD in the tip of the ACF60 sensor provides fast-response temperature measurement for compensation, which can be displayed and transmitted from the C8000 converter.

Sanitary Design

Designed for ultra-sterility, the six electrodes are sealed in the FDA (USP class VI) compliant PEEK sensor tip without the use of O-rings or epoxy. Mounted in an optek inline sensor body, the design ensures smooth and unrestricted flow of all process fluids with minimized hold-up and hydrostatic shear. The ACF60 sensor is suitable for CIP/SIP applications.

pH Electrode Adapter PF12

  • 12-degree electrode orientation provides improved performance
  • pH electrode solution ground allows inline diagnostics
  • Designed to enhance flow and minimize hold-up volume
  • Suitable for most Ø 12 x 120 mm pH-electrodes

12 Degree

The optek PF12 pH electrode adapter is designed to mount pH electrodes at the optimal angle of 12 degrees. This allows the sensor to use electrolyte-filled glass electrodes and improves the functionality and life time of the pH probes. The PF12 electrode adapter is compatible with a broad variety of pH electrodes.

Solution Ground

The PF12 is equipped with a solution ground (earth) connection mounted to the sensor body. This allows the use of pH electrodes that incorporate differential pH input techniques. Additionally, the solution earth connection provides a highly stable measurement while enabling sensor diagnostics including low glass impedance, out-of sample, and broken electrode/cable warnings.

Sanitary Design

Mounted in an optek inline sensor body the design of the PF12 ensures smooth and unrestricted flow of all process fluids. The PF12 meets sterility requirements and is compatible with CIP/SIP while minimizing hold-up volume and hydrostatic shear.

pH and conductivity measurement combined for low hold-up volume

Line Size Volume Volume
cond. only pH + cond.
0.25 in. < 22 ml < 41 ml
0.50 in. < 26 ml < 44 ml
0.75 in. < 34 ml < 52 ml
1.00 in. < 48 ml < 65 ml

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Technical Data

ACF60
Measurement
Measuring Range

any measuring range between 0 - 10 μS/cm to 850 mS/cm

Protection

all parts have an IP rating of IP65 or higher

Sensor Body
Line size

1/4 in. to 6 in. (DN 6 to DN 150), ... others on request

Process Adaption
Material

probe body: PEEK (FDA, USP Class VI)

Electrodes

stainless steel 1.4435 (SS 316L), dF < 1%, BN2

Port gasket

O-ring: EPDM (FDA / USP Class VI), ... others on request

Process pressure

20 bar (290 psi) up to + 50 °C (122 °F)

10 bar (145 psi) up to +100 °C (212 °F)

4 bar ( 58 psi) up to +135 °C (275 °F)

Temperature Ratings
Process temperature

permanent: -10 - 90 °C (14 - 194 °F)

peak 30 min/day: -10 - 135 °C (14 - 275 °F)

Ambient temperature

operation:-10 - 40 °C (14 - 104 °F)

transport:-20 - 70 °C ( -4 - 158 °F)

Temperature sensor

integrated Pt1000 RTD (IEC class A)

accuracy: ± 0.25 °C at 25 °C (77 °F)

Accuracy
0 - 10 μS/cm

calibrated: ± 1 % of measuring value ± 0.2 μS/cm

uncalibrated: ± 3 % of measuring value ± 0.2 μS/cm

repeatability: ± 0.5%

0 - 250 mS/cm

calibrated: ± 1 % of measuring value ± 0.2 μS/cm

uncalibrated: ± 3 % of measuring value ± 0.2 μS/cm

repeatability: ± 0.5%

250 - 500 mS/cm

calibrated: ± 2 % of measuring value ± 0.2 μS/cm

uncalibrated: ± 6 % of measuring value ± 0.2 μS/cm

repeatability: ± 1%

500 - 850 mS/cm

calibrated: ± 5 % of measuring value ± 0.2 μS/cm

uncalibrated: ± 12 % of measuring value ± 0.2 μS/cm

repeatability: ± 3%

Pressure and temperature ratings specified herein may be subject to limitations - see instruction manual. The appropriate choice of material for all wetted parts is the sole responsibility of the user. Data given are subject to changes without prior notice.
PF12
Sensor Body
Material

Stainless steel 1.4435 (SS 316L), dF < 1 %, BN2

Line size

1/4 in. to 6 in. (DN 6 to DN 150), ... others on request

Surface

electro polished (Ra < 0.4 μm)

Solution ground

female SA483 for solution ground plug

Process pressure

6 bar (87 psi)

Electrode types

suitable for wide variety of electrodes with dimensions Ø 12 x 120 mm, PG 13.5 thread

Temperature Ratings
Process temperature

-10 °C to +135 °C, (14 °F to 275 °F)

Pressure and temperature ratings specified herein may be subject to limitations - see instruction manual. The appropriate choice of material for all wetted parts is the sole responsibility of the user. Data given are subject to changes without prior notice.

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