Where should you install your ultrasonic or radar liquid level sensor on your tank? Since tanks vary from simple to complex, the short answer is: mount the sensor on a flat, perpendicular surface with clear, unobstructed measurement space down to the tank bottom.

To ensure accurate performance, there are common tank features you should avoid. In cylindrical tanks, never install the sensor in the center of a dome top. The curved surface reflects and amplifies energy, reducing signal quality. Instead, use a flat off-center mounting surface, or “shoulder,” designed for equipment.

Do not place the sensor directly next to a sidewall, as the spreading beam will reflect off the wall. Avoid mounting above pipes, inflow streams, or other internal structures since they can deflect or block the signal. Likewise, never install the sensor above or beside ladders—the rungs will disrupt the measurement.

If the tank has mixers, do not mount above the blades or shaft. Keep sensors away from strong turbulence or, if necessary, use a standpipe to stabilize readings. Similarly, do not mount above submersible pumps. As the liquid level drops, the exposed pump body will interfere with the signal.

In summary: locate your sensor on the tank’s flat shoulders, off-center from dome tops, and free of any obstructions such as walls, pipes, inflows, ladders, mixers, or pumps.

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