Where does the sensor get mounted?

The sensor must be mounted on the tank whose level is to be monitored. For best results, please follow these recommendations:
• The sensor component of the TLM100 must be mounted flat, so that the round
transceiver portion of the TLM100 faces straight downward.
• The sensor component of the TLM100 must be mounted over the deepest part of
the tank, in order to obtain accurate depth readings when the tank is empty or
near empty.
• In order to obtain accurate readings when the tank is empty, the tank bottom
directly under the TLM100 must be both smooth and flat, so that the ultrasonic
sound waves transmitted by the sender are reflected back to the sender for
measurement. If the tank bottom under the TLM100 is sloped, grooved, or rough,
then the TLM100 may not report an accurate level reading (or any level reading
at all) when the tank is empty.
• The area below the sensor component of the TLM100 must be free of obstruction
from tank baffles or return lines that might reflect ultrasonic waves back towards
the sensor component, causing inaccurate depth readings.
• The sensor component of the TLM100 must be mounted away from the tank
walls, so that reflections from the tank walls do not cause inaccurate depth
readings.
• For a flat bottom tank, the mounting hole in the top of the tank through which the
TLM100 measures fluid level should be located as close to the center of the tank,
both front-to-back and side-to-side, as possible. This will ensure maximum
accuracy of reading in the event that the vessel experiences pitch and roll.