Notice: This product was discontinued on Sep 30, 2021.

There is no alternative model. Please contact your local VEGA office.

Measuring Principle

High frequency microwave pulses are coupled on a cable or rod and guided along the probe. The pulse is reflected by the product surface. The time from emission to reception of the signals is proportional to the distance of the level. The instruments are already preset to the ordered probe length (0 % and 100 %). In many cases, a setup on site is not necessary. In any case you carry out the setup of FLEX without medium.
The shortenable, bare cable and rod versions can be simply adapted to the local conditions, if necessary.

Contact

< Notes>

These products are released to the Customers in the following Sales area.

(1) Sales area : Australia, New Zealand, South East Asia, India, Middle East

(2) Customers : Customers for bundled solution, major project and selected global major accounts

We can also provide Level switches : Vibration(SWING, VIB, WAVE) & Capacitance(CAP).
For more information, please contact our sales.

Singapore (Regional Head Quarters)	Yokogawa Engineering Asia Pte. Ltd. 5 Bedok South Road, Singapore 469270, Singapore Phone: (65)-6241-9933　　Fax: (65)-6241-2606
Australia	Yokogawa Australia Pty. Ltd. Tower A, 112-118 Talavera Road, Macquarie Park NSW 2113, Australia Phone: (61)-2-8870-1100　　Fax: (61)-2-8870-1111
Thailand	Yokogawa (Thailand) Ltd. 799 Rama 9 Road, Bangkapi, Huaykwang, Bangkok 10310 Thailand Phone: (66)-2-715-8600　　Fax: (66)-2-715-8688
India	Yokogawa India Ltd. Plot No.96, Electronic City Complex, Hosur Road, Bangalore - 560 100, India Phone: (91)-80-4158-6000　　Fax: (91)-80-2852-0625
Middle East	Yokogawa Engineering Middle East FZE- Dubai P.O.Box 18112, Jebel Ali Free Zone, Bldg no. LIU FZS1-BH03, Free South Zone, Dubai, UAE Phone: (971)-4-8049100　　Fax: (971)-4-8860844

* For the users in Japan, click here.

Application

Level in liquid

Density fluctuations, steam generation or strong pressure and temperature fluctuations do not influence the measuring result. Also buildup on the probe or the vessel wall do not influence the measurement.
This makes the FLEX simple in planning and commissioning.
An ideal application is level measurement in a bypass tube or standpipe where even products with a dielectric constant of 1.4 can be measured reliably. Weld joints, buildup and corrosion inside the tube do not influence the accuracy of the level measurement. Also in case of overfilling up to the process fitting, your measurement is safe.
FLEX 81Y offers also a special solution for ammonia applications.

flex80y-figure1

Interface measurement in liquids

Non-conductive products only reflect the energy of the microwave partly. The energy that is not reflected passes the medium and is reflected at the phase interface to a second liquid. This effect is used by the interface measurement. You can simply select this function on FLEX via the adjustment tools. By doing so, you get reliably the total level as well as the level of the lower menu in your vessel.
Typical applications are interface measurements in storage tanks, separators and pump sumps. Generally the FLEX determines the level of the water layer below a non-conductive medium. The FLEX is independent of the density of the medium, this means for you a reliable, mantenance-free and precise measurement.

flex80y-figure2

Level in bulk solids

Typical process proporties in bulk solids are strong dust and noise generation, buildup or condensation and of course material cones.
With the FLEX you have the ideal measurement for your silo or bunker for such conditions. Also typical product properties such as, e.g. the moisture content, the mixture ratio or the granulation size are not important and make the planning really simple. The intelligent software gives you high measurement certainty and a well monitored probe.
Even in products with small dielectric constant (from 1.1), a reliable measurement is ensured thanks to the "thinking" processing.

flex80y-figure3

Specifications

Model / Application	Measuring Range Accuracy	Process Fitting	Process Temperature	Process Pressure
FLEX 81Y Liquids	Rod probe up to 6 m Coax probe up to 6 m Cable probe up to 75 m +/- 2 mm	Thread from G¾, ¾ NPT, flanges from DN 25, 1"	-40 to +200 deg C	-1 to +40 bar (-100 to +4000 kPa)
FLEX 82Y Bulk solids	Rod probe up to 6 m Cable probe up to 75 m +/- 2 mm	Thread from G¾, ¾ NPT, flanges from DN 25, 1"	-40 to +200 deg C	-1 to +40 bar (-100 to +4000 kPa)
FLEX 83Y Liquids requirements	Rod probe up to 4 m Cable probe up to 32 m +/- 2 mm	Flanges from DN 25, 1" hygienic fittings	-40 to +150 deg C	-1 to +16 bar (-100 to +1600 kPa)
FLEX 86Y Liquids	Rod probe up to 6 m Coax probe up to 6 m Cable probe up to 75 m +/- 8 mm	Thread from G1½, 1½ NPT, flanges from DN 50, 2"	-196 to +450 deg C	-1 to +400 bar (-100 to +40000 kP