Type 8221

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Table of contents

1. General technical data

4

1.1.

About the probe ...............................................................................................................................................................................4

1.2.

4-electrode conductivity probe........................................................................................................................................................4

1.3.

2-electrode conductivity probe........................................................................................................................................................5

2. Product variants

6

2.1.

4-electrode conductivity probe........................................................................................................................................................6

Four active electrodes positioned laterally on the periphery of the armature..................................................................................6

Four active electrodes positioned at the base of the armature. ......................................................................................................7

2.2.

2-electrode conductivity probe........................................................................................................................................................8

3. Approvals and conformities

8

3.1.

General notes...................................................................................................................................................................................8

3.2.

Conformity .......................................................................................................................................................................................8

3.3.

Standards.........................................................................................................................................................................................8

3.4.

Pressure Equipment Directive (PED)................................................................................................................................................9

Device used on a pipe .....................................................................................................................................................................9

Device used on a vessel ..................................................................................................................................................................9

3.5.

Foods and beverages/Hygiene ........................................................................................................................................................9

4. Materials

9

4.1.

Bürkert resistApp .............................................................................................................................................................................9

5. Dimensions

10

5.1.

4-electrode conductivity probe with VarioPin electrical connection..............................................................................................10

With 1½" clamp process connection.............................................................................................................................................10

With 2" clamp process connection................................................................................................................................................11

With 2" (DN 50/40) process connection adapted for GEA Tuchenhagen VARINLINE process connections.................................11

With PG 13.5 process connection .................................................................................................................................................12

5.2.

4-electrode conductivity probe with 8-pin M12 male connector...................................................................................................12

With 1½" clamp process connection.............................................................................................................................................12

5.3.

2-electrode conductivity probe with 5-pin M12 male connector...................................................................................................13

With 1½" clamp process connection.............................................................................................................................................13

With screw-on process connection ...............................................................................................................................................13

6. Performance specifications

14

6.1.

Linearity diagram............................................................................................................................................................................14

6.2.

Pressure temperature diagram.......................................................................................................................................................14

7. Product installation

15

7.1.

Installation notes............................................................................................................................................................................15

4-electrode conductivity probe with 1½" clamp or G 1¼" process connection............................................................................15

4-electrode conductivity probe with PG 13.5 process connection ...............................................................................................15

2- or 4-electrode conductivity probe with clamp, G or NPT process connection and with M12 connector.................................16

8. Product operation

16

8.1.

Measuring principle........................................................................................................................................................................16

9. Networking and combination with other Bürkert products

17

10. Ordering information

17

10.1.

Bürkert eShop................................................................................................................................................................................17