Place the Sontek IQ sensor in the water facing the direction of flow.

There is an arrow on the sensor itself showing which way water should flow.

Secure the sensor to the steel strut with 1/2" bolts, washers, and strut nuts. Fasten with a 1/2" wrench.

Regardless if attaching the Sontek sensor to the short aluminum strut channel or the tall steel strut channel, secure in the same fashion.