Type 8221

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1.

General technical data

1.1. About the probe

The probes are based on the 2 or 4 electrode principle. The technical data depends on the probe variant.

The common technical data are described in this chapter and further information on the specifics can be found in chapter “2. Product

variants” on page 6.

1.2. 4-electrode conductivity probe

Product properties

Material

Make sure the device materials are compatible with the fluid you are using.

Further information can be found in chapter “4.1. Bürkert resistApp” on page 9.

Depending on the probe variant.

Further information on the materials can be found in chapter “2. Product variants” on page 6.

Seal

EPDM (conform to FDA - 21CFR177.2600)

Surface quality

Ra < 0.4 μm (15 μin.), electro-polished (wetted metal surfaces)

Dimensions

Further information can be found in chapter “5. Dimensions” on page 10.

Measuring element

4-electrode

Temperature sensor

Pt1000

Performance data

Linearity 1.) (relative)

± 0.5…5 %

Medium data

Fluid temperature

Depending on the probe variant. Further information can be found in chapter “2. Product variants” on

page 6.

Fluid pressure

Depending on the probe variant. Further information can be found in chapters “2. Product variants”

on page 6. and “6.2. Pressure temperature diagram” on page 14.

Process/Pipe connection & communication

Process connection

Depending on the probe variant. Further information can be found in chapter “2. Product variants” on

page 6.

Electrical connection

Depending on the probe variant. Further information can be found in chapter “2. Product variants” on

page 6.

Approvals and conformities

Directives

CE directive

Further information on the CE Directive can be found in chapter “3.3. Standards” on page 8.

Pressure equipment directive

Complying with article 4, paragraph 1 of 2014/68/EU directive

Further information on the pressure equipment directive can be found in chapter “3.4. Pressure

Equipment Directive (PED)” on page 9.

Foods and beverages/Hygiene

• FDA declaration of conformity (only for variant with PEEK armature and EPDM seal)

• USP class VI declaration

Depending on the probe variant. Further information can be found in chapter “2. Product variants” on

page 6.

Materials

Inspection certificate 3.1

Depending on the probe variant. Further information can be found in chapter “2. Product variants” on

page 6.

Others

On request: 2-point calibration certificate

Depending on the probe variant. Further information can be found in chapter “2. Product variants” on

page 6.

Environment and installation

Ambient temperature

Depending on the probe variant. Further information can be found in chapter “2. Product variants” on

page 6.

Degree of protection according

to IEC/EN 60529

IP67, with connected device, inserted and screwed cable plug

1.) If only one cell constant is used over the entire range, uncertainties of ± 5 % may occur. If the measured calibration value is close to the measured conductivity value of the solution

used, a measurement deviation of ± 0.5 % can be achieved.