300-R010-45L datasheet(2/12 Pages) MAGNETROL

2 / 12 page

The Model 300/301 is a versatile system that utilizes non-

contact ultrasonic technology to measure liquid levels in

a variety of applications. The system consists of a trans-

mitter and an ultrasonic transducer. The transducer con-

tains a piezoelectric crystal that has the ability to convert

electrical signals generated by the transmitter into ultra-

sonic pulses.

The unit operates by directing ultrasonic pulses, or

sound waves, through the air toward the liquid surface.

They are then reflected off the liquid surface as an echo,

and returned to the transducer. The piezoelectric crystal

then converts the returned echo into an electrical signal

which is analyzed by the transmitter. The elapsed time

between the generation of the ultrasonic pulse and the

return echo is proportional to the distance between the

face of the transducer and the liquid surface.

TECHNOLOGY

TYPICAL

MOUNTING

CONFIGURATIONS

The transducer is installed above the liquid surface. A

minimum dead zone distance of 18" (457 mm) must be

allowed between the face of the transducer and the maxi-

mum attainable level. Figure 1 shows a typical open

channel flow installation with the transducer mounted on

a bracket. Figure 2 shows how the unit can be mounted

in a coupling or flange for level or volume applications.

Model 300

Flow

Parshall

Flume

Model 300

Air

Liquid

Dead zone

18" minimum

(457 mm)

Flange

Maximum span

28.5' (8.7 m)

Figure 1

Typical Mounting – Open Channel Flow

Figure 2

Typical Mounting — Level/Volume

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