Fribourg, Switzerland –– Meggitt Sensing Systems, a division of Meggitt PLC and a leading supplier of advanced condition monitoring and machinery protection systems for turbomachinery, has made improvements to its Vibro-Meter® proximity measuring systems to provide customers with more reliable sensors over a longer lifetime. All redesigned products are fully compatible with existing installations, available at the same price and ship in about four weeks.
Proximity probes, also known as eddy current transducers, are used to measure the relative vibration of rotating shafts in hydro, gas and steam turbines. Proximity probes are one component of Meggitt’s machinery protection and condition monitoring solutions which can maximize uptime and prevent costly unplanned downtime for the turbines used in power generation.
Improvements have been made throughout the entire measurement chain, starting with the TQ series of proximity probes, which are available in measurement ranges from 2 to 12 mm. The probes’ integral cable can be combined with an EA series extension cable to suit longer runs and the cable connection can be easily protected using the new IP 172 interconnection protection. The IQS 450 signal conditioner completes the chain.
The TQ series underwent calibration improvements to increase the repeatability of measurements. In addition, the Ex equipment certifications were upgraded so that the proximity probes are now suitable for ATEX zone 0 (Ex ia) hazardous areas. The construction of the probe was redesigned to use a push-fit assembled cap and offer better sealing, such that transducer and integral cable now has a protection rating of IP68.
A new self-locking miniature coaxial connector, combined with a new cable protection sleeve material, increased the maximum temperature of the cable and connector from 85 to 180 °C, making the chain suitable for a wider range of applications and increasing the longevity of the sensors. The self-locking connector has a secure, perceptible connection which can be felt. New special plating materials, including gold, offer better corrosion and abrasion resistance.
Additional protection of the connection between the sensors’ integral cable and the EA extension cable is available. The IP 172 interconnection protector, made of fluorosilicone material, provides excellent resistance against hydrocarbon fuels, petroleum oils and silicone oils. It is a splash proof, low cost alternative to junction boxes for use in less extreme environments and has a maximum temperature of 200 °C.
For more information about Meggitt’s proximity measuring systems, visit http://energycatalog.vibro-meter.com/index.php?option=com_mtree&task=listcats&cat_id=12&Itemid=56 or email
. For more information about Meggitt’s Vibro-Meter line of accelerometers, dynamic pressure sensors and complete turbine monitoring solution, visit www.vibro-meter.com.