335-AA1A-G5P Datasheet, PDF (2/4 Pages) Magnetrol International, Inc. – Echotel® Model 335 Non-Contact Ultrasonic Transmitter for Level, Volume, or Open Channel Flow

TECHNOLOGY
Non-contact ultrasonic level technology is a proven
method for accurate liquid level measurement. This
technology features the ability to measure the level or
volume of the fluid without making physical contact with
the material. This is especially important in applications
containing corrosive materials, suspended solids or
coating media.
The level measurement is made by emitting an ultrasonic
pulse from the transducer and measuring the time
required for the echo to reflect from the liquid surface
and return to the transducer. The powerful electronics
measure the time of the round trip pulse and, by
knowing the speed of sound, calculates the distance.
Since speed of sound is temperature dependent, the
transducer also measures the temperature in the vessel to
provide compensation for changing temperature.
By inputting the type and geometry of the vessel, the
intelligent electronics can calculate the liquid volume in
the vessel. In a similar operation, the Model 335 can
perform open channel flow measurement by converting
the level reading into units of volume per time. Common
tank shapes, flumes, and weirs are stored in the 335
software. A 32-point linearization table is also available
for unusual tanks or primary flow elements.
Typical Mounting
Level/Volume
Model 335
Air
Dead band
14" minimum
(.35 m)
Typical Mounting
Open Channel Flow
Model 335
Flow
Liquid
Parshall
Flume
DIMENSIONAL INFORMATION
INCHES (MM)
3.75 (95)
M20 x 1.5 (2)
1_{/2" NPT (2)}
2" NPT
2
5.8 (148)
3.1 (80)
2.1 (54)
10 feet
r=7 inches
15 feet
r=11 inches
20 feet
r=14 inches
25 feet
r
r=18 inches
7 Degree Beam Radius vs. Distance