Alfa Laval Conductivity Transmitter

Alfa Laval’s Conductivity Transmitter is ideal for use in the brewery, food and beverage, and biopharm industries. Alfa Laval Conductivity Transmitters provide accurate and reliable measurement of a process liquid’s ability to carry electrical currents.

Related Industries:

Food processing, Beverage processing, Biotechnology, Dairy processing, Pharmaceutical production

Touch screen, easy to use

The conductivity transmitter features an integrated graphical LCD display with 3 different backlight colours. Conductivity (µS/cm or mS/cm), concentration (%), temperature (°C) and also the customer-specific medium name are conveniently indicated for on-site control for safe operation, especially for manually operated cleaning systems. It is quickly configured on the spot without a computer using the touch screen. It can be programmed to four measuring ranges, which can be easily adjusted from the touch screen. Precise control of temperature compensation is also possible from the display, which makes the Alfa Laval conductivity sensor ideal for a wide range of conductivity measurements.

All stainless steel and PEEK, hygienic design

Stainless Steel Conductivity Transmitter for Process Control are highly accurate and hygienically designed, measures the ability of process liquids to carry electrical currents.

All wetted parts are made of AISI 316L stainless steel and PEEK, and designed to withstand process temperatures between -20 and +150°C. Because the conductivity sensor can withstand high temperatures, it is well suited for use in Cleaning-in-Place (CIP) and Sterilization-in-Place (SIP) processes. These compact 3A-certified sensors may be installed in pipe sizes DN40 and larger.

High accuracy, fast response

Thanks to optimized flow geometry and fast response time, Alfa Laval Stainless Steel Conductivity Transmitter for Process Control are particularly suitable for applications that require the separation of media and/or the measurement of cleaning agents in Cleaning-in-Place (CIP) equipment. Measurements are highly accurate even at very low conductivity and flow rates.

Remote controllable, easy to use

The conductivity transmitter come with four standard pre-configured measuring ranges, which can be easily adjusted from a remote location. Precise control of temperature compensation is also possible from a remote location, which makes the Alfa Laval Conductivity Transmitter ideal for a wide range of conductivity measurements.

An integrated display indicates values for mS/cm and °C, which instantly provides users with monitoring and control data required for safe operation, especially for manually operated cleaning systems.

Operating principle

Inductive conductivity measurement is based on the principle of a transformer. An AC voltage generator controls the primary side of the transformer. The liquid flows through the channel bore in the measuring head and forms a conductor loop, which links the primary side of the transformer and the secondary side of the transformer. The measuring cell is a homogeneous sealed body all in PEEK. Through the body is a hole, through which the media is flowing. Built-in around the hole are two coils; a primary coil supplied with an AC voltage and a secondary coil, which picks up a small signal through the media inducted voltage. The size of this voltage is dependent on the conductivity of the media. This signal is handled and amplified in the electronics to a linear analogue 4…20 mA output signal.

Also built into the body is a Pt100 sensor placed in the tip of the sensor. This is measuring the media temperature to enable temperature compensation of the conductivity signal, which is very temperature dependent. The Pt100 sensor signal also features as a seperate analogue 4…20 mA output signal.

The coils and sensor are encapsulated in the PEEK sensor body, which have a surface with surface roughness (Ra) <0,8 µm. It is therefore well suited for use in hygienic processes or directly in concentrated acids or alkalis.

Application

The Alfa Laval conductivity transmitter is designed to fulfill the demands
of conductivity transmitters in hygienic production. The main features
are:
– Wetted parts in PEEK
– Compact, food compatible, hygienic design
– Process temperature -20 to 140°C
– 4 configurable measuring ranges
– Adjustable, active and very fast temperature compensation
– Insensitive to polarization, adhesion and solids
– Built-in graphical display and touch screen
– Compatible with Alfa Laval In-line instrumentation system
– 4-20 mA output for conductivity and temperature

Standard range

The Alfa Laval conductivity transmitter is a transmitter for inductive
measurement of conductivity. Precise, configurable temperature
compensation and remote setting of the four pre-configured measuring
ranges make the Alfa Laval conductivity transmitter ideal for a wide
range of conductivity measurements. The integrated graphical display
and touch screen offers the user instant local supervision, which is an
advantage e.g. in manually operated cleaning systems.
A high operating temperature limit is an advantage in SIP systems.
The optimized flow geometry and the fast response time make the
Alfa Laval conductivity sensor particularly suitable in applications for
separation of medias and measurements of cleaning agents in CIP
equipment. The accuracy is excellent even at very low conductivity
and flow rates.

Working principle

Inductive conductivity measurement is based on the principle of a
transformer. The primary side of the transformer is controlled by an
AC voltage generator. The liquid flowing through the channel bore in
the measuring head and forms a conductor loop, which links between
the primary side of the transformer and the secondary side of the
transformer .
The output current is proportional with the conductivity of the media.
Signal conditioning, amplification and conversion provide a 4-20 mA
signal output from the galvanically isolated D/A converter.
The fast-response temperature sensor in the tip compensates for the
temperature in the liquid resulting in maximum accuracy and reliability

TECHNICAL DATA

Conductivity

Messuring range: . . . . . . . . . 50 µS/cm to 1 S/cm
Accuracy:
0-500 µS/cm . . . . . . . . . . . . ? 1.5 %
0-1/0-500 µS/cm . . . . . . . . . ? 1.0 %
0-1 µS/cm . . . . . . . . . . . . . ? 1.5 %

Temperature

Measuring range: . . . . . . . . . -20 to 140°C (150°C up to 1 hour)
Resolution: . . . . . . . . . . . . . 0.1°C
Accuracy: . . . . . . . . . . . . . . < 0.4 %
Repeateability: . . . . . . . . . . . 0.2% of FS
Protection class: . . . . . . . . . IP67
Max media pressure: . . . . . . . 10 bar

Electrical data

Power supply: . . . . . . . . . . . 15-35 Vdc
Power consumption max: . . . . 180 mA
Output conductivity: . . . . . . . 4-20 mA, max. load 500 Ohm,
Output temperature: . . . . . . . 4-20 mA, max. load 500 Ohm,
Connection: . . . . . . . . . . . . M12 plug or M16 cable gland
Response time: . . . . . . . . . . <3 ms
Ambient temperature
Without display . . . . . . . . . . -40 – 85°C
With display . . . . . . . . . . . . -30 – 80°C

PHYSICAL DATA

Sensor lenght (L): . . . . . . . . .Short or Long
Housing (ø): . . . . . . . . . . . . .80 mm
Materials
Wetted parts (Short): . . . . . . .PEEK
Wetted parts (Long): . . . . . . .PEEK
Fieldhouse: . . . . . . . . . . . . .AISI 304
Surface finish: . . . . . . . . . . .Ra < 0.8 µm
Operating temperature
Wetted parts: . . . . . . . . . . . .-20 to 140°C (150°C < 1 hour)
Field house: . . . . . . . . . . . . .-20 to 80°C
Weight
Conductivity sensor: . . . . . . .Approx. 1500 gr.

Process connection

– Clamp DN38 (ISO2852)/clamp DN40 (DIN32676)
– Clamp DN50 (ISO2852)/clamp DN51 (DIN32676)
– G1 (ISO228)
– DN32 (DIN11851)
– DN40 (DIN11851)
– DN50 (DIN11851)
– HTC Connection 1½”
– HTC Connection 2”
– HTC Connection 2½”
– HTC Connection 3”
– HTC Connection 4”

Certificates

-3.1 (Option) (FDA conformity declaration for Peek materials included)
-Calibration certificate (Option)

Alfa Laval Conductivity Transmitter