HAZARDOUS AREA


ROTRONIC ATEX CERTIFIED HUMIDITY AND TEMPERATURE SENSORS


The ROTRONIC Intrinsically Safe HygroFlex5-EX series of humidity/moisture and temperature sensors was developed for easy installation in areas where there is a risk of explosion due to dust or gas in the environment.


They were designed to meet the demanding requirements of the oil & gas industry as well as the pharmaceutical, biotechnology and food industries, and will be suitable for hazardous applications elsewhere.


Conforming to the latest international standards, the Rotronic HygroFlex5-EX transmitter is galvanically isolated; there is no need for an intrinsically safe power supply, ‘clean’ earth or Zener barrier thereby saving costs and installation time.


ATEX certified probes are available for all applications.


The intrinsically safe transmitters have two channel 4…20 mA outputs selected from temperature, humidity or a moisture value such as dew point or ‘absolute humidity’ (for example Mixing Ratio g/kg). These can be freely scaled exactly as required, using Rotronic HW4 software, for the process being monitored or controlled.


Main features:


• Stainless steel probes certified for ATEX Zone 0/20


• Standard & cable mount probes with a screw- applications


in probe for pressure


• HygroFlex5-EX measurement transmitter certified for Zone 1/21


• An intrinsically safe power supply is NOT required; the transmitter is galvanically isolated


• Wall and duct versions available An LC display is an option wire supply, 2-


• 2- analogue outputs


(option of dew point, absolute humidity (g/kg) or another moisture value)


• Robust aluminium transmitter housing; high IP66 protection


• Range of calibration accessories for use in the Safe Area


A Technical datasheet is available, visit:


www.rotronic.co.uk ROTRONIC Instruments (UK) Ltd T: 01293 571000


E2S INTRODUCES SIL 2 CERTIFIED BEX ALARM HORN SOUNDERS AND XENON STROBE BEACONS


E2S Warning Signals, the leading independent audible and visual warning signals manufacturer, has introduced a SIL 2 version of its flagship BEx range of explosion proof alarm horn sounders and Xenon strobe beacons.


The new IECEx and ATEX certified BEx horns and strobes are the perfect solution for designers and integrators of SIL 2 systems; they are designed and tested to ensure a 99.9% reliability rate, bringing plant safety to new levels. To meet the requirements of SIL 2, a combination of software and hardware in the new units accurately monitors and interprets the sound output of the horn or the light output from the Xenon strobe to check it is functioning correctly. The fault monitoring reports back to the control


p42 | www.sosmagazine.biz | January 2016


panel utilising either separate fault contacts or by the introduction to the monitoring circuit of a series resistor. Using the series resistor facility eliminates the need for any additional cables and can be used in a standard two-wire arrangement.


The key benefits are:


• The correct functioning of the signalling device function is checked and communicated to the control panel.


• Time consuming physical inspections are eliminated, reducing running cost. • Plant safety is increased because all devices are confirmed to be operating. • The BEx units are designed to integrate seamlessly into the SIL 2 environment.


A detailed technical and installation manual, downloadable from www.e2s.com/SIL2,


SIL 2 Compliant


been published to assist system designers and engineers.


In high risk industries such oil, gas and petrochemicals, adopting SIL 2 (Safety Integrity Level) systems is becoming the norm, in particular for the safety-critical fire and gas detection systems. While the fire and gas control panel will normally initiate automatic process shutdown procedures in the event of an alarm, the audible and visual warning devices are critical components in ensuring that personnel are warned in an emergency.


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