Magnetrol
EHEDG approved products
Posted: 3 June 2003
Magnetrol International NV has successfully applied for EHEDG testing
of several product ranges.
TNO, Nutrition and Food research at Zeist (The Netherlands) has
performed in-place-clean ability tests and validated Horizon, Eclipse,
Echotel and Thermatel controls compliant with the new EHEDG guidelines
(ref 2,3,4).
The main characteristics of the sanitary controls by Magnetrol
include mechanically buffed stainless steel sensor finishes up to
0,5 µm (RA 20), sensor shapes without angles / sharp edges,
Valox or epoxy painted aluminium housings and a wide choice of process
connections.
Horizon and Eclipse transmitters both utilize TDR technology and
can measure liquid levels independently from any liquid variables
(such as SG, pH, dielectric).
They are insensitive to process conditions, which limit the effectiveness
of other technologies, e.g. foam, vapours, turbulences, temperature
or pressure drifts.
The CIP/SIP Guided Wave Radar probe is available with 2”,3”
or 4” Tri-clover compatible 16 AMP fittings and is installed
with Hy-joint seals to fully meet the EHEDG requirements.
Echotel gap sensors utilize ultrasound waves to detect liquid level
and are the switch equivalent of the Horizon and Eclipse transmitters.
Unlike most vibrating rods, they totally ignore foam and don’t
need any calibration at all.
Output options include all voltage, relay or shifting mA (16mA
/ 8mA-loop powered).
Thermatel detects, with common electronics, either liquid level
or liquid and gas flow, or even liquid-liquid interface, by thermal
dispersion technology.
The spherical shaped transducer houses two RTD’s of which
the unheated one provides a reference temperature of the process
conditions and the heated one measures the heat dissipation that
occurs from contact with the medium, difference of medium, or flow
rate.
Field calibration is easy to accomplish by means of a single potentiometer
and trend indication via LED’s (only TG1 electronics).
These Magnetrol controls comply with the hygienic criteria of the
Machinery Directive 98/37/EC annex 1 (additional essential health
and safety requirements for certain categories of machinery) section
2.1 (agri-foodstuffs machinery), the hygienic requirements of EN
1672 – part 2 and with the hygienic equipment design criteria
of the EHEDG [Ref. 2,3,4].
For more information see www.magnetrol.com.
Posted by Richard Price,
Editor Pipeline Magazine
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