Conductivity sensor 0 pages

.
kyThe conductivity sensor for sanitary use
Alfa Laval conductivity sensor
.
Application
The Alfa Laval conductivity sensor is designed to fulfill the demands of
conductivity sensors in Sanitary and pharmaceutical production
Main features are:
- Wetted parts in AISI316L, stainless steel or PEEK
- Compact, food compatible, hygienic design
- Process temperature -20...130°C
- 4 configurable measuring ranges
- Adjustable, active temperature compensation
- Insensitive to polarization, adhesion and solids
- LCD display for conductivity and temperature
- 4... 20 mA output for conductivity and temperature
Standard range
The Alfa Laval conductivity sensor is a sensor for inductive
measurement of conductivity. The compact design in all stainless
steel enables installation in pipes from DN40 and upwards. Precise,
configurable temperature compensation and remote setting of the four
pre-configured measuring ranges make the Alfa Laval conductivity
sensor ideal for a wide range of conductivity measurements. The
integrated display for mS/cm and °C 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 (3) in
the measuring head and forms a conductor loop, which links between
the primary side of the transformer (1) and the secondary side of the
transformer (2).
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 (4) compensates
for the temperature in the liquid resulting in maximum accuracy and
reliability.