Siemens 7ML1105 Compact Operating Instructions page 7

The transducers operate in association with Siemens' ultrasonic level monitoring products by
converting electrical pulses that are provided by the transceiver into ultrasonic pulses. When
transmitted, these ultrasonic pulses reflect from the material surface and echo back to the
transducer. The echo is converted back to an electrical signal, and is interpreted by the Siemens
transceiver using our proven Sonic Intelligence™ algorithms.
The effective acoustical energy is emitted from the transducer face and radiated outward,
decreasing in amplitude at a rate inversely proportional to the square of the distance.
Maximum power is radiated axially (perpendicular) from the transducer face in a line referred to
as the axis of transmission. Where power is reduced by half (– 3 dB), a conical boundary
defining the sound beam, centered about the axis of transmission, is established. The diametric
measurement of the cone in degrees defines the beam angle. Impedance matching techniques
are used to optimize the transfer of power from the transducer into air and vice versa.
All transducers incorporate an integral temperature sensor that reports the air temperature at
the transducer to the transceiver. The connection is transparent, in that both the ultrasonic and
temperature components of the transducer use the same leads.
①
②
③
④
⑤
Optional
1)
Transducers
Compact Operating Instructions, 09/2021, A5E43390688-AC
XPS-10, XPS-15/15F,
XPS-30, XRS-5/5C
Explosion proof conduit seal
Transducer
Transducer face
3 db boundary
Axis of transmission
2)
ST-H
1)
Introduction
1.6 About Siemens' Transducers
Transducer with explosion proof
conduit seal
7