This standard covers the definition and measurement of field of view and coverage characteristics relevant to the use and application of vacancy and occupancy sensors using individual or any combination of passive infrared, ultrasonic, or microwave technology.
The testing criteria of NEMA WD 7
2011 Occupancy Motion Sensors Standard outlines:
- Environmental conditions
- Equipment
- Test subject height, weight and clothing requirements
- Test procedures for major and minor motion sensing
The CLS test laboratory conducts extensive testing of motion sensitivity properties relevant to specific application and intended performance. Our occupancy sensor technology experts take great pride in their active involvement in creating, utilizing, and driving industry standards.
Upon completion of testing, an illustration is developed that typically includes a grid pattern, with a maximum 3' x 3' cell size indicating major and/or minor motion detection.
Coverage Comparison
Best Performance
Passive infrared major motion coverage
Greengate Ceiling Sensors provide the best major motion coverage area and initial activation performance in the industry.
• Lights turn ON sooner when walking into a room using Greengate ceiling sensors.
• Major Motion coverage area exceeds the competition by 5-42% when tested.
Leading Performance
Ultrasonic minor motion coverage
Greengate Ultrasonic and dual technology sensors utilize the latest in circuit design combined with innovative firmware, to deliver best-in-class minor motion coverage.
• Greengate ceiling sensors have superior minor motion detection capability.
• Sensor coverage ensures lights stay ON when minimal amount of human motion is present.
About the Standard
What caused an interest in standardizing characteristics for use and application of occupancy motion sensors?
Occupancy Sensor Manufacturers
Specifying Engineers
No Agreed Upon Standard
NEMA WD7 Testing Ensures the Sensors are:
Dependable
Ensure lights do not turn OFF inadvertently when minimal amount of human motion is present.
Accurate
Ensure lights stay ON while occupants show only minor motion such as type and writing.
Fast
Ensure lights turn ON sooner when walking into a room.