To Calculate:
Sonic beam diameter (D)*

Given:
L = distance of sensor in inches BS = beam spread in degrees

Formula:
2 x L x tan(BS/2) = D inches

Example:
L = 4 inches BS = 7 degrees (SM600)

Calculation:
2 x 4 x tan(7/2) = 0.489 inch diameter

Note:
Since the beam spread in degrees changes with distance from the sensor, this calculation is approximate. For more accurate calculation, ask your distributor or the SCC for a beam plot.