PTFE capacitive proximity sensors
May 2003
Sensors & Transducers
Logistics (Industry)
"Acids, bases and solvents frequently attack sensors in normal plastic housing. But these chemicals have no chance against the new SICK CM 18 PTFE capacitive proximity sensors, making them particularly suitable for detecting acids, bases and solvents," says Patrick Pitts, marketing manager of Rhomberg, which imports the sensors.
PTFE (polytetrafluorethyelene) is resistant against almost all chemicals and organics solvents. As a result the material is ideal for sensors that are exposed to aggressive media and fumes that they give off.
Using PTFE for the housing and the M18 screws allows the sensor to be used for checking the filling levels of aggressive media, eg, hydrochloric acid, a variety of alkalis and numerous solvents. The same is true of object detection in environments in which these materials may occur. The material is also suitable wherever plants require frequent cleaning with chemicals or at high temperatures. As PTFE does not absorb any liquid it is not possible for any build-up of the medium to take place on active switching surfaces - preventing spurious signals while checking filling levels or presence.
The use of PTFE has no effect on functional features of the CM 18. Like the plastic version, the advantages of the CM 18 PTFE include an enclosure rating of IP67, high electro-magnetic compatibility (EMC) - complying with device standard EN 60947-5-2, a long switching distance that can be continuously adjusted between 3 mm and 8mm, PNP or NPN switching output, antivalent output functions and a 2 m connecting cable.
For more information contact Patrick Pitts, Rhomberg, 011 444 5444.
Further reading:
Smart alternative for float switches
ifm - South Africa
Sensors & Transducers
With the LI level sensor, you can reliably detect leakages and point levels on a permanent basis. The capacitive measuring system has no moving parts. Malfunction or maintenance issues due to deposits on the mechanical parts are therefore eliminated.
Read more...
Telco sensors in the pulp and paper industry
Gail Norton Instrumentation
Sensors & Transducers
The pulp and paper industry poses a major problem for most photoelectric sensors. The high level of contamination in these dusty, dirty and grimy environments makes it impossible for most competing sensors to operate and sense reliably and efficiently.
Read more...
Precision acoustic imagers
Comtest
Sensors & Transducers
To help users identify and localise ‘mechanical areas of interest’ within short timeframes, Comtest has added a unique new feature to Fluke’s ii910 precision acoustic imagers.
Read more...
Efficiency and precision with IO-Link sensors
RS South Africa
Sensors & Transducers
RS South Africa has its own brand known as RS PRO, which offers a choice of over 88 000 products across all industries and technologies. The guaranteed quality and breadth of this range make RS PRO the smart choice for your business.
Read more...
Smart alternative for float switches
ifm - South Africa
Sensors & Transducers
With the LI level sensor, you can reliably detect leakages and point levels on a permanent basis. The capacitive measuring system has no moving parts. Malfunction or maintenance issues due to deposits on the mechanical parts are therefore eliminated.
Read more...
Optical fork sensor series
Gail Norton Instrumentation
Sensors & Transducers
The OFS series consists of self-contained optical fork sensors that are housed in a durable, U-shaped aluminum housing, which operates in through-beam mode.
Read more...
In-line process transmitter to optimise sterile processes
WIKA Instruments
Sensors & Transducers
The new model DMSU22SA in-line process transmitter from WIKA helps to optimise sterile processes in the pharmaceutical and food industries, with less energy consumption, less cleaning effort ,and more safety.
Read more...
Automated clean-in-place
Endress+Hauser South Africa
Sensors & Transducers
A clean-in-place (CIP) process is integral to a food and beverage producer’s responsibility to deliver safe, high-quality products to consumers. However, as industries worldwide shift focus towards sustainability, CIP procedures face new challenges.
Read more...
Signal conditioning is the protective armour between plant and field
Omniflex Remote Monitoring Specialists
Sensors & Transducers
Measurement and control of physical properties are the foundation of all critical industrial technologies. Ian Loudon, international sales and marketing manager at remote monitoring specialist, Omniflex explains the challenges of industrial signal conditioning and the importance of safety engineering.
Read more...
Precise detection of complex rotational movements
Beckhoff Automation
Sensors & Transducers
The EP3751-0260 EtherCAT Box module by Beckhoff connects an acceleration sensor with an inertial measurement unit - a gyroscope. This provides accurate detection of acceleration and rotational motion in addition to shock, vibration and tilt measurement, both as preprocessed values and as raw sensor data.
Read more...
printer friendly version