Product category:
Level and tank contents instrumentation
News Release from: Magnetrol International | Subject: Echotel 915 P/W
Edited by the Processingtalk Editorial
Team on 18 December 2003
No extra cost for SIL 2/3 compliant
level switch
The Echotel 915P/W from Magnetrol International is a 2-wire level switch that can detect the high or low level of almost any liquid without calibration: a SIL 2/SIL 3 compliant device at no extra cost
The Echotel 915 P/W from Magnetrol International is a 2-wire level switch that can detect the high or low level of almost any liquid without calibration After FMEDA analysis, Exida - one of the world's leading agencies who verify suitability of equipment for SIL certified loops - has issued a report of the Echotel 915 P/W into a SIL 2 loop as a standalone installation or in a SIL 3 loop, installed as a redundant set-up
This article was originally published on Processingtalk on 22 May 2003 at 8.00am (UK)
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Customers have the benefit of a SIL 2/SIL 3 compliant device at no extra cost.
The Echotel 915P/W is the second Magnetrol product to obtain SIL compliance, following the Eclipse Guided Wave Radar (TDR) level transmitter.
Echotel 915 P/W ultrasonic level switches are 2-wire, loop powered units, which utilise pulsed signal technology.
The principle behind contact ultrasonic switches is that high frequency sound waves are easily transmitted across a transducer gap in the presence of liquid, but are attenuated when the gap is dry.
Pulsed signal technology is used for superior performance in difficult process conditions, and to provide excellent immunity from sources of electrical noise interference.
As per its NAMUR NE 21 testing, the unit can safely be used without shielded instrumentation cable - although the appliance of shielded cable is a manufacturer recommendation.
The Echotel 915P/W provides at all times a live signal: 18mA (safe condition)/8mA (process alarm).
The device performance is monitored by a continuous self test procedure that will report an instrument failure with 5 mA.
By using a standard mA signal, the unit can be connnected directly to an analog I/O, or to a digital I/O via a commercially available trip amplifier card.
The Echotel 915P is available with stainless steel (316/316L), Hastelloy C (2.4819) or Monel (2.4360) sensors with threaded or seal welded flanges conforming to PED.
The Echotel 915 W uses a solid Kynar (PVDF) sensor.
Safety approvals include ATEX intrinsically safe and explosion proof and overfill prevention as per TUV/Vlarem. Request a free brochure from Magnetrol International ...
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