Illustration shows 4 flags positioned along wetted radius at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock

Figure 5. Illustration of field measurement of sprinkler wetted radius for stationary systems.

Illustration shows 4 flags positioned along wetted radius at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock

Adapted from Figure 7 in Evans et al., 1999a.