The TROLL^® 9500 instrument can be configured with a turbidity sensor, a pressure sensor, or both sensors (shown in the photo above).

The turbidity sensor measures from 0 to 2000 NTU/FTU and is rated to a depth of 105 m (346 ft).

Pressure sensors rated to the following depths are available:

• 11 m (36 ft)
• 21 m (69 ft)
• 70 m (231 ft)
• 210 m (692 ft) — Not available with turbidity