Large-Space Sensor Tuning: Sensitivity, Delay, and Coverage Without the Guesswork

Why it matters

"Large spaces need deliberate sensor tuning because one bad setting can affect the whole control strategy across a wide area."

On a live project, the difference between a good controls design and a painful one usually comes down to how clearly the behavior is defined before anyone starts programming or testing.

Where projects get stuck

• Sensitivity is set so high that minor movement keeps the zone alive forever.
• Delay times are too short for real occupancy patterns.
• Coverage assumptions are based on the drawing, not the ceiling conditions.

Field checks

• Test each sensor in the actual room layout, not in the shop.
• Tune sensitivity and timeout together instead of one at a time.
• Look for ceiling obstructions, HVAC effects, and fixture reflections.
• Verify the whole space with real occupancy, not just walk-through tests.

Bottom line

"A tuned sensor feels invisible because the room behaves the way occupants expect it to."