16 CFR 1211.11 - Photoelectric Sensor Test Requirements for Garage Door Openers

A photoelectric sensor that fails to detect a child lying in a doorway is worse than no sensor at all: it gives a false sense of protection. Section 1211.11 defines the exact tests a sensor must pass to prove it will detect real obstructions in real conditions.

What this regulation says

16 CFR 1211.11 specifies performance tests for photoelectric sensors installed on vertically moving residential garage door operators. Sensors must pass all applicable tests.

Normal operation test (subsection a). The sensor must detect an obstruction placed on the floor at three positions across the door opening:

"1 foot (305 mm) from each end and the midpoint"

The test obstruction is a white vertical surface 6 inches (152 mm) high by 12 inches (305 mm) long, centered perpendicular to the plane of the closed door. The door must reverse at each of the three test positions.

Sensitivity (pendulum) test (subsection d). The sensor must detect a moving object. The test uses a cylindrical rod 1 7/8 inches (48 mm) in diameter and 34.5 inches long, swung as a pendulum through the sensor beam from a 45-degree angle. Testing occurs at the same three horizontal positions used in the normal operation test. This simulates a child running or falling through the beam.

Ambient light test (subsection e). The sensor must function correctly when a 500-watt incandescent flood lamp (or equivalent, rated 3600K or lower) is aimed at the sensor from 5 feet away at angles of 15 to 20 degrees. Bright light must not blind or overwhelm the sensor and prevent detection.

Horizontal door test (subsection b). Sensors on horizontal sliding doors are tested at five height positions across the door, with the same obstruction specification.

Vertical array sensors (subsection f). Sensors that use multiple beams at different heights undergo modified test procedures accounting for blanking functions and specific height considerations.

When it applies

Section 1211.11 applies to photoelectric sensors used as secondary entrapment protection on residential garage door operators covered by 16 CFR Part 1211. The tests apply whether the sensor is the original equipment or a replacement.

What this means for you

Three positions matter, not just the center. A sensor that detects in the middle of the door opening but not near the edge will pass a casual test but fail a compliant one. Proper sensor alignment means the beam covers the full opening continuously.

A 6-inch obstruction is the minimum detection target. The test uses a 6-inch-tall surface. The sensor beam, mounted no higher than 6 inches above the floor, must detect this object. If sensors are mounted too high, a small child lying in the opening may not break the beam.

Sunlight can blind a sensor. The ambient light test addresses a real failure mode. Afternoon sun shining directly into the sensor eye can prevent detection. If your door faces west or south and the sensor behaves erratically on sunny afternoons, sensor angle adjustment or a shade may help.

Replacement sensors must pass the same tests. Universal aftermarket sensors need to meet 1211.11 requirements. A sensor that lacks documentation of federal compliance is a risk.

G Brothers positions sensors at 5 to 6 inches above the floor on every installation and conducts both a static obstruction test and a wave test before leaving the job.

Full text and source

Read the full text of 16 CFR 1211.11 at https://www.law.cornell.edu/cfr/text/16/1211.11. The full Part 1211 is at: https://www.ecfr.gov/current/title-16/chapter-II/subchapter-B/part-1211

16 CFR 1211.11 applies to photoelectric sensors used on residential garage door operators. Edge sensors are governed by 16 CFR 1211.12.