Type 8201

3 | 15

Visit product website 

1.

General Technical Data

The complete measuring system consists of the pH probe, an adaptation set, a fitting, the reservoir with hose for the electrolyte solu-

tion, the electrolyte solution and the electric cable for connecting to a suitable transmitter.

The pH probe Type 8201 is supplied without adaptation. According to the chosen fitting/armature the appropriate adaptation set has

to be selected. Different hygienic fittings (Type 8201) or for general purpose applications pH armatures of Type 8200 can be selected.

See data sheet Type 8200  for more information.

Product properties

Material

Please make sure the device materials are compatible with the fluid you are using.

Detailed information can be found in chapter “3.1. Chemical Resistance Chart – Bürkert resistApp” on page 5.

Wetted parts

Sensor tube

Enamelled steel tube

Diaphragm

Ceramic

Process connection

Stainless steel 1.4404

Electrode head

PVDF

Seal

EPDM

Electrolyte vessel

Stainless steel (1.4301)

Dimensions

Detailed information can be found in chapter “4. Dimensions” on page 6.

Compatibility

Any tanks or process pipelines which are fitted with

• pH armature Type 8200 or

• Fitting Type 8201 or

• Flange connection adapted for GEA Tuchenhagen VARINLINE process connection

(DN 50…DN 125) or

• Clamp 2"

See data sheet Type 8200  or chapter “4.2. Fittings Type 8201” on page 9 or

chapter “9.4. Ordering chart” on page 14 for more information.

Temperature sensor

Pt1000 integrated within the holder

Measuring variable

Absolute pH value

Reference system

• Aseptic ground (ceramic) diaphragm

• Reference electrode Ag/AgCI

• KCI electrolyte 3-molar sterile (conform to FDA)

Measuring range

0…10 pH (for up to 12 pH, see chapter “5.2. pH/temperature diagram” on page 11)

Measuring chain zero point

8.65 ± 1 pH1.)

Measuring chain isotherm point pH

0

1.0 ± 1 pH; Uis = 440 mV1.)

Product accessories

Suitable transmitter

• Multi channel and multi function multiCELL transmitter/controller Type 8619

See data sheet Type 8619 multiCELL  for more information.

• Devices with isotherm option

Performance data

Measuring deviation

Max. ± 0.05 pH, depending on calibration

Repeatability

0.05 pH

Slope of measuring chain

56…59 mV/pH1.) at 25 °C (77 °F)

Measurement chain potential

+ 600…- 400 mV

Inner resistance of measuring chain

109…1010 Ω at + 25 °C (77 °F)

Diaphragm resistance

Approx. 20…200 kΩ

Insulation resistance

≥ 1012 Ω

Inner capacity (with connection cable)

≤ 5 nF

Inner inductivity (with connection cable) Negligibly low

Thermal shock resistance

∆T = 120 °C (248 °F)

Corrosion resistance

See chapter “5.1. Sensor corrosion resistance diagram” on page 10.

Electrical data

Output signal

• pH value: analog signal, to be connected to multiCELL transmitter/controller Type

8619. See data sheet Type 8619 multiCELL  for more information.

• Pt1000: 2-wire