The visibility sensor Sentry measures visibility (MOR) by means of scattered light method within the range of 30 m up to 16 km.

Measuring parameter/uncertainty:

• Measuring parameter: Atmospheric visibility
• Measuring range:  30 m to 16 km (10 m to 10 km optional)
• Measuring method: scattered light 42° forward scatter angle method
• Source: 880 nm LED
• Uncertainty: 10%
• Time Constant: user selectable from 10 sec to several minutes