BURKERT 559616 Type 8222 conductivity transmitter is designed for measuring the conductivity of liquids. The sensor element comprises a two-electrode cell and a Pt1000 temperature probe. The sensor itself is available with three different cell constants C. Sensors with C=0.01 or 0.1 cm-1 are fitted with stainless steel electrodes, while those with C=1.0 cm-1 are fitted with graphite electrodes. Thanks to the design of the measuring device, Bürkert has simplified installation and maintenance work.

The Type 8222 device is available in two variants. The ELEMENT standard variant (which includes model 559616) is proposed with either three adjustable outputs (two digital outputs and one analogue output) or four adjustable outputs (two digital and two analogue), and can be equipped with a display. The display is only required for start-up, configuration (e.g. measuring range, units, calibration, limit values) and for process value display. The ELEMENT neutrino variant is a 2-wire device without display, equipped either with a 4...20 mA current output or with a digital communication mode via IO-Link or büS (Bürkert system bus based on CANopen).

Key Features

• Perfect for clean water and slightly concentrated liquids
• Compact measuring device for direct connection to the control level (PLC) via analogue 4…20 mA signal or digital IO-Link or Bürkert system bus (büS)/CANopen communication
• Parametrisation, calibration and transfer of parametrisation data all possible thanks to a removable display/configuration module
• Simulation of process values for diagnostics
• Universal process connection, three different cell constants to cover a wide range of applications such as reverse osmosis

General Technical Data

Feature	Specification
Wetted parts
Probe holder	PVDF, stainless steel 1.4571 (316Ti)
Electrode	C = 0.01/0.1 cm-1: stainless steel 1.4571 (316Ti) C = 1 cm-1: graphite
Compatibility	With any pipe which is fitted with Bürkert S022 adapter
Pipe diameter	DN 32...DN 110 (DN 06...DN 25 under specific conditions)
Temperature sensor	Pt1000 integrated within the probe holder
Measuring range
Conductivity measurement	0.05 μS/cm...10 mS/cm
Temperature measurement	-20...+100 °C
Performance data
Measurement deviation	±3% of measured value (Conductivity), ±1°C (Temperature)
Measuring range resolution	1 nS/cm
Electrical data
Power source	Limited power source according to UL/EN 62368-1 standards
DC reverse polarity protection	Yes
Overvoltage protection	Yes
Medium data
Fluid temperature	G 1½ PVC union nut: 0...+50 °C G 1½ PVDF union nut: -20...+100 °C (restricted by adapter)
Fluid pressure	Max. PN 16
Environment and installation
Ambient temperature	Operation and storage: -10...+60 °C
Relative air humidity	≤85%, without condensation
Degree of protection	IP65, IP67 (according to IEC/EN 60529)

WARNING

If the device is mounted in a humid environment or outside, then the maximum voltage allowed is 35 V DC instead of 36 V DC.

Dimensions

ELEMENT standard variant (C = 1 cm-1)

ELEMENT standard variant (C = 0.1 cm-1)

Performance Specifications

Pressure temperature diagram

Measurement Principle

Conductivity is defined by the property of a solution to conduct electrical current. The charge carriers are ions (e.g. dissolved salts or acids). Regarding this device, the measuring cell consists of two metal electrodes which are set at a fixed distance apart and with a known specific surface. The measured current is a direct function of the quantity of ions contained in the solution. The conductivity is calculated using Ohm’s law.

To compensate for the geometry of the conductivity cell, a cell constant is used: Conductivity [S/cm] = Measurement [S] x Cell constant [1/cm].

The sensor is selected according to the measuring range and medium. The meter is either a two wire device or a three wire device which requires a power supply of 14 V DC or 12 V DC up to 36 V DC and delivers a 4…20 mA standard signal proportional to the conductivity and/or to the temperature of the fluid as output signal.

Installation Notes

The ELEMENT Type 8222 conductivity meter can be installed into any adapter/fitting with a G 1½ external threaded sensor connection by simply tightening the G 1½ union nut. Select the appropriate adapter, taking into account the specific requirements of the measuring device and the adapter material (temperature and pressure), and install it on a pipe.

TIP

In order to obtain reliable measurements, air bubbles must be avoided. Ensure that the mounting location provides a continuous and complete immersion of the probe in the flow stream.