ABOUT THE TRANSDUCER
The ST-50 series of transducers operates in association
with Milltronics ultrasonic level monitoring products.
The transducer converts the electrical energy of the
transmit pulse from the transceiver into acoustical energy.
It then converts the acoustical energy of the echo back
into electrical energy for the transceiver receive period.
The effective acoustical energy is generated from the
transducer face and is 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 from the air back into the transducer.
SPECIFICATIONS
Model :
» ST-50
Measurement range :
» typically 0.3 m -15 m (1-50 ft) restricted to transceiver maximum
▲
Temperature range :
» – 40 to 93 °C (– 40 to 200 °F)
✧
Frequency :
» typically 44 KHz, transceiver dependent
Beam angle :
» 5°
Weight
*
:
» 3.9 Kg (8.5 lb)
Construction :
» CPVC housing with polyurethane face
» 1" NPT mounting/conduit connection with neoprene jacketed cable
» totally encapsulated
» options: » flanging: the transducer can be factory flanged,
consult Milltronics
» facing:
» CPVC for corrosive applications
» Teflon
for corrosive applications
» polyethylene foam for dry-dust applications
Separation :
» typically 365 m (1200 ft) from associated transceiver
▲
Approvals :
» CSA, FM and BASEEFA / CENELEC
*
approximate shipping weight of transducer with standard cable length and unflanged
▲
refer to associated transceiver manual
✧
the maximum temperature for polyethylene foam facing is 77 °C (170 °F)
Teflon
is a registered trade mark of Dupont
– 3 db
boundary
5°
beam
angle
axis of
transmission,
perpendicular
to transducer
face
transducer
95/07/11
transducer
face
PL-418
1
