FEATURE ATEX EQUIPMENT K
istler has added the world’s first high temperature accelerometer to its
pressure sensor for the monitoring of gas turbines. Both the new accelerometers and pressure sensors are designed for long-term use at up to 700°C and are certified in accordance with the European ATEX guidelines for explosion prevention (Ex-nA and Ex-ia). The piezoelectric accelerometer is not pyroelectric and does not show any moisture-induced stress (popcorn effect) offering manufacturers and operators of gas turbines new options for monitoring the combustion stability. The efficient and secure operation
of gas turbines relies upon stable combustion processes. These have to comply with increasingly strict regulations, including flexible operation on different fuels and minimal emissions. At the same time, there is an associated risk of unstable combustion processes and pressure pulsations. Reliable and continuous monitoring systems are required to monitor and control these combustion processes. The new high temperature
accelerometer from Kistler is the only accelerometer designed for permanent operation with a lifespan of three to five years at temperatures up to 700°C. The patented PiezoStar crystal technology
Monitoring gas turbines up to 700°C
from Kistler used in the new sensor is neither pyroelectric nor does it produce any popcorn effects. As a result, the sensor is highly reliable and generates high-quality signals for the interference-free monitoring of combustion dynamics. The Swiss-made sensor completes the
modular thermoacoustic portfolio from Kistler, including pressure sensors and accelerometers for long-term monitoring of gas turbines and combustion dynamics in high temperature surroundings. Both high temperature sensors from Kistler are certified in accordance with the European ATEX guidelines for explosion prevention (Ex-nA and Ex-ia).
Kistler
www.kistler.com
Short term test at 750°C - the proprietary Kistler PiezoStar crystal technology used in the new Type 8209A accelerometer withstands the most extreme conditions
Kistler’s new accelerometers and pressure sensors and matching charge amplifiers are capable of monitoring gas turbines at up to 700°C
ATEX infra-red beam set Explosion proof signalling and call point family
GJD has announced the availability of its external ATEX approved infra-red beam set (GS100). The ATEX approved infra-red beam provides versatile detection solutions, which allows engineers to reliably protect hazardous areas. The GS100 is designed to be used in
association with alarm annunciation equipment, or other devices that provide a means of monitoring the voltage free relay alarm output, for example CCTV integration. Mark Tibbenham, GJD’s managing director
comments: “The ATEX approved GS100 is an extremely reliable product, which is perfect
for use in hazardous areas. It provides advance warning of potential intruder threats or safety breaches, providing total peace of mind to people on the site.” Tibbenham continues: “It is our sincere belief that GJD’s perimeter detection
equipment is at the forefront of security in terms of detection ability, reliability and freedom of false alarms. The inclusion of the ATEX approved infra-red beam technology further enhances our product offering.” The innovative technology is ATEX certified and is suitable for use within the
petrochemical and oil sectors, as well as other similar industries where explosion, flame, weather or dust proof housings are required. A major advantage of the GS100’s design is the asynchronisation of the beam
connections to provide high level security allowing multiple sets of beams to be installed on the same site, or stacked above each other without ‘cross interference’. As well as providing covert detection, being cost and energy efficient, and range
programmable up to 100m, the GS100 has a bi-optical beam transmission system to enhance the stability and reliability of the device.
GJD 12 WINTER 2018 | INDUSTRIAL COMPLIANCE
www.gjd.co.uk
E2S Warning Signals’ GNEx family features GRP housings and sealing to IP66, and is approved by IECEx and ATEX for Zone 1, 2, 21 and 22 use. The visual signals
in the GNEx family feature a 5, 10, 15 or 21 Joule Xenon strobe light source, giving an effective intensity light output, of more than 900 cd for high ambient light or long-distance signalling. The LED variant contains a light source that has five flash rates: 1, 1.5, 2 Hz and double and triple flashes. High and low power steady modes for status indicator uses can also be user selected. The alarm horn sounders have outputs up to 123dB(A) at
1m, are available with either flared or radial horns, have 64 embedded tones, including the PFEER and major national tones, and offer four stages with the first two independently selectable. Fifteen and 25W loudspeaker versions are available in 8 Ohm, 16 Ohm and 70/100V Line versions for clear and powerful voice messaging in hazardous areas. Designed for the manual activation of fire alarms, gas
detection and emergency shutdown systems, the GNEx manual call points are available with break glass, push button and push button with tool reset operation, and a comprehensive range of standard accessories.
E2S Warning Signals
ww.e2s.com / INDUSTRIALCOMPLIANCE
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