SPECIAL FOCUS SENSORS & TRANSDUCERS LINEAR POSITION SENSOR RANGE ENHANCED
housing or the overall mounting length. The independent linearity across the range is ±1% for the 12.5 to 50mm versions and ±0.5% for the 75 to 175mm versions. The ELPM has a temperature range of -30˚C to +150˚C continuous
Having been used in
demanding applications such as ride height, suspension displacement and steering angle measurement, Variohm EuroSensor’s ELPM motorsports series linear position sensor has now been developed further. For example, there is now an optional internal dual-lip seal arrangement that offers enhanced reliability and improved endurance. This will suit all areas of motorsports as well as industrial applications where
unpredictable wet and hostile environmental conditions may exist, the company explains. The S option (ELPMS) is
available across the full range of the sensor series, covering electrical stroke lengths from 12.5mm to 175mm (in 25mm increments) for both the standard self-aligning pivot bearing version and the ‘Pop’ version that includes snap-on mountings for rapid installation or removal. Furthermore, the improved sealing option does not increase the 9.5mm diameter cylindrical
with a short term rating to 175˚C. Both the ELPM and
ELPMS series are rated at 25 million operations and offer a maximum speed of 10m/sec. The 24 VDC supplied sensor has a recommended wiper current of only 10µA for maximum efficiency in battery powered use and is supplied as standard with a 500mm free cable with a Viton seal.
Variohm EuroSensor T: 01327 351004
www.variohm.com
LVDT SENSOR FOR USE ON SUBSEA TREES
The SSI Series of Subsea LVDT Linear Position Sensors from Macro Sensors are now offered with the CiA 443 CANopen communication interface mandated for use on the subsea trees (also known as ‘christmas trees’) used in offshore oil drilling. Valves on the ‘christmas tree’ are used to open and close oil pipes as they bring oil from the sea bed. The Submersible LVDT is used to provide feedback on valves in monitoring and controlling their status as part of a subsea control module. Failure to completely close a valve could result in an environmental disaster. Located on the ocean floor in depths up to several hundred
meters, the LVDT sensor and other prescribed ‘Level 2’ components installed on the ‘tree’ are connected to offshore platforms by means of CAN networks. In addition to complying with the new CiA 443 CANopen regulation, Macro Sensors encases its SSI Series of Subsea LVDTs in Inconel 625 to withstand deepsea environments with pressures up to 5000 psi. Due to a higher content of nickel, chromium and molybdenum, the Inconel offers excellent protection against corrosion and enhances the already high- reliability of the LVDT assembly, ensuring that it can meet service life requirements of at least 20 years, even if fully exposed to seawater. Reliability is critically important due to the cost of replacing subsea hardware.
Macro Sensors
www.macrosensors.com
SENSORS FOR OIL & GAS APPLICATIONS
A new range of compact yet high-accuracy sensors have been launched by Morgan Advanced Materials for the oil & gas extraction sector. These harness the capabilities of the company’s proprietary piezoelectric materials which can provide reliable sensing and monitoring in high- temperature environments above 200˚C. Suitable for applications from custody transfer to gas flow monitoring, the sensors from Morgan’s Technical Ceramics business draw on the proven properties of lead zirconate titanate (PZT). The sensors are capable of measuring
both high and low flow to extreme accuracies; and their ultrasonic nature means they cope well with potential pressure drop, the company adds. Made from a selection of inert materials
including titanium, alumina and zirconia, the new sensors also boast enhanced corrosion resistance when compared with conventional alternatives. This is particularly useful in harsh environments. Charles Dowling of Morgan Advanced
Materials commented: “Our piezoelectric materials have been proven to withstand continuous use at up to 250˚C with an intermittent maximum of 300˚C, providing peace of mind for specifiers seeking a reliable, accurate solution. When their compact size and conductivity are also taken into account, they represent an attractive option for both custody transfer and flaring applications.”
Morgan Advanced Materials
www.morgantechnicalceramics.com
WIRELESS VIBRATION AND TEMPERATURE SENSOR LAUNCHED
Machine vibration is often caused by imbalanced, misaligned loose or worn parts. By monitoring machines for increases in vibration and temperature, problems can be detected before they become too severe and cause additional damage or result in unplanned downtime. To help, Banner Engineering has launched the QM42VT1 vibration and temperature sensor. Available in the UK from Turck Banner,
this measures RMS velocity, in millimetres per second or inches per second, and temperatures up to 80°C. Mounted as close as possible to the bearings, using a standard or magnetic bracket, the QM42VT1 monitors the machine’s health by
24 OCTOBER 2015 | INSTRUMENTATION
detecting increases in vibration and temperature. The company’s DX80 range provides the
communication link as the sensor is designed to work with 1-wire serial radio devices, such as the Wireless Q45VT Node, the P6 Performance Node, and the MultiHop M-H6 radio. Vibration thresholds, based on the ISO 10816 standard are easily set. When a threshold has been exceeded, the wireless Node can provide local indication, send the signal to a central location, and send the vibration and temperature data to the Gateway for collection and trending.
Turck Banner T: 01268 578888
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