8
Prosonic T - FMU 130, 131, 230, 231, 232
Endress+Hauser
Installation
Blocking Distance
Due to the ringing time of the sensor, there is a zone immediately below it in which
returning echoes cannot be detected. This so-called blocking distance is very important
to the correct function of the Prosonic T. It determines the minimum distance between
the sensor and the maximum level.
• Mount the sensor such that the distance between it and the maximum product level
exceeds the blocking distance. Please note that if product enters the blocking
distance, the device will not measure correctly.
• Never mount two Prosonic T’s in a vessel because the instruments may not function
correctly.
• Do not mount the sensor in the center of the vessel roof.
• Install the transmitter at right angles to the surface of the material.
• Do not measure through the filling curtain.
Housing
• Cable entry Pg 16
Break the cable entry in the housing before mounting.
• Cable diameter 0.2 to 0.35 inches (5 to 9 mm)
• Sleeves for connection thread
G ½; ½ NPT or M 20x1.5 supplied
Blocking Distance
(BD)
Sensor BD
FMU ft (m)
130 / 230 0.82 (0.25)
131 / 231 1.3 (0.4)
232 2 (0.6)
FMU 130, 230
FMU 131, 231
dimensions in inches (mm)
Protective Hood
Order No.: 942665-0000
Housing
Rotatable housing.
Can be repositioned after mounting.
60 mm wrench
(2.36”)
Max. torque
11.1 - 14.8 ft-lbs
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