Sensor Switch Ceiling Occupancy Sensor PDT CMR

The SensorSwitch CMR PDT 9 is a ceiling-mounted line-voltage occupancy sensor that combines passive infrared and microphonics for 360° detection and reliable small-motion control of lighting in commercial interiors.

This compact ceiling sensor is built for offices, retail, conference rooms and other indoor commercial spaces where automated lighting saves energy and reduces manual switching. It uses Passive Dual Technology (PDT) — combining PIR sensing with microphonics — to register both body heat movement and subtle motions such as hand gestures, giving dependable coverage across a full cone beneath the ceiling. Designed for simple retrofit or new installs, the CMR PDT 9 works directly on line voltage, requires no external power pack, and offers adjustable time delays and push-button programming to match a variety of occupancy patterns.

How does the CMR PDT 9 detect people and small movements?

The sensor pairs PIR sensing with microphonic inputs to create overlapping detection across the ceiling coverage area. PIR responds to thermal movement while microphonics pick up acoustic vibration from human activity, improving sensitivity to small gestures and slow motion that PIR alone might miss.

• 360° conical coverage for complete room sensing.
• Optimized for small motion within approximately a 12 ft radius.
• Microphonics filter reduces false triggers from non-occupant noises.
• Works at typical commercial ceiling heights of 8–15 ft.

What installation and compatibility options are available?

The CMR is designed for straightforward ceiling mounting in common commercial junctions. It fits standard 3.5" octagon and single-gang boxes, ceiling tiles and metallic grid systems, and includes the mounting hardware needed for fast install or retrofit.

• Direct line-voltage sensor — no external power module required.
• Mounts to ceiling tile, grid, 3.5" octagon or single-gang boxes.
• Compact footprint: 4.55" diameter and 1.55" depth for discreet mounting.
• Push-button programming simplifies setup and commissioning.

Which settings control how long lights stay on and how visible status is?

The sensor offers a user-adjustable time delay and a visual LED for quick status checks. Choose from short automatic shutoff to longer holds to tailor operation to occupancy patterns without rewiring.

• Time delay adjustable from 30 seconds up to 20 minutes.
• Green LED indicates sensor activity and helps during setup.
• Self-contained relay provides single-level switching for lighting loads.
• Estimated 10-year battery life at default settings for internal settings retention.

Is the CMR PDT 9 durable and code compliant for commercial use?

SensorSwitch built the CMR series to meet commercial standards and to operate across common interior temperature ranges. It is CSA certified for U.S. and Canadian requirements and backed by a limited warranty for long-term installations.

• CSA certified to US and Canadian standards for safety compliance.
• Operates reliably between -10°C and 60°C ambient temperatures.
• Five-year limited warranty for commercial deployments.
• Robust design for consistent, low-maintenance operation.

Who is this for: Facility managers, electrical contractors and building owners who want a low-profile, line-voltage occupancy sensor that improves energy efficiency without complex controls will find the SensorSwitch CMR PDT 9 well suited to private offices, small conference rooms, retail back areas, and other enclosed commercial spaces. It’s a practical choice when you need 360° sensing, reliable small-motion detection, easy ceiling installation, and simple programming — all in a compact, code-compliant package.