This is the passive infrared line voltage ceiling sensor. Wattstopper’s CI-355 passive infrared (PIR) occupancy sensor automatically turns lighting on and off based on occupancy. The sensor mounts on the ceiling with a flat, low-profile appearance and provides 360 degrees of coverage.

The CI-355 is line voltage and operates on a single phase at 120, 230, 277 or 347 VAC. The sensor uses passive infrared technology (PIR) to sense occupancy and automatically turn lighting on. PIR works by sensing the difference between infrared energy from a human body in motion and the background space. When no occupancy is detected for the length of the time delay, lighting automatically turns off. Check out Wattstopper DLM products here.

CI-355 – 360° up to 1200 ft2

CI-355-1 – 360° up to 500 ft2

This is the low voltage PIR ceiling sensor. Wattstopper’s CI-300 Passive Infrared (PIR) Ceiling Sensors automatically turn lighting on and off based on occupancy. The sensor mounts on the ceiling with a flat, low-profile appearance and provides 360 degrees of coverage.

CI-300 Series Sensors operate on 24 VDC, VAC or halfwave rectified. Utilizing the latest PIR technology, they automatically turn lighting on when a difference is detected between infrared energy from a human body in motion and the background space. When no occupancy is detected for the length of the time delay, lighting automatically turns off. For manual-on operation, the CI-300 will operate with a low-voltage momentary switch. Check out Wattstopper DLM products here.

360° up to 1200 ft2

This is the low voltage PIR ceiling sensor. Wattstopper’s CI-300 Passive Infrared (PIR) Ceiling Sensors automatically turn lighting on and off based on occupancy. The sensor mounts on the ceiling with a flat, low-profile appearance and provides 360 degrees of coverage.

CI-300 Series Sensors operate on 24 VDC, VAC or halfwave rectified. Utilizing the latest PIR technology, they automatically turn lighting on when a difference is detected between infrared energy from a human body in motion and the background space. When no occupancy is detected for the length of the time delay, lighting automatically turns off. For manual-on operation, the CI-300 will operate with a low-voltage momentary switch. Check out Wattstopper DLM products here.

360° up to 500 ft2

Wattstopper UT-305-X ULTRASONIC CEILING SENSOR. This is the ultrasonic low voltage ceiling sensor. Wattstopper’s UT-300 Ultrasonic Ceiling Sensors automatically turn lighting on and off based on occupancy. The sensors mount on the ceiling with a flat, unobtrusive appearance and provides 360° coverage.

UT-300 Series Sensors operate on 24 VDC, VAC or halfwave rectified. They use 40 KHz high frequency ultrasound to sense occupancy and automatically turn lighting on. When no occupancy is detected for the length of the time delay, lighting automatically turns off. For manual-on operation, the units work with a low-voltage momentary switch.

Features

• Advanced control logic based on RISC microcontroller
provides:
– Advanced Signal Processing eliminates false triggers and
provides immunity to RFI and EMI
– Walk-through mode turns lights off three minutes after
the area is initially occupied – ideal for brief visits such as
mail delivery
• LED indicates occupancy detection
• Coverage 500-2,000 square feet
• Available with isolated relay for integration with BAS or HVAC
• DIP switch simplifies sensor adjustments
• Patented ultrasonic diffusion technology spreads coverage to
a wider area
• UT-300 Series Sensors work with low-voltage momentary
switches for manual control
• Clip mounting system makes ceiling tile installation simple
• Uses plug terminal wiring system for quick and easy
installation
• BAA/TAA-compliant models available
• Sensor coverage tested to NEMA Guide Publication WD 7-2000

Specifications

• 24 VDC/VAC
• Time delays: 5, 10, 15, 20 or 30 minutes, Walk-through/
Test Modes
• Sensitivity adjustment: variable with trimpot
• Ultrasonic frequency: 40 kHz
• UT-300 contains isolated relay with N/O and N/C outputs;
rated for 1 Amp at 30 VDC/VAC
• Mounting options: ceiling tile; 4” square junction box with
double-gang mud ring
• Max. UT-300s per power pack: B=2, BZ=3
Max. UT-305s per power pack: B=3, BZ=4
• Dimensions: 4.5” x 1” (114.3mm x 25.9mm) diameter x depth
• UL and cUL listed
• Five year warranty

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The WattStopper DT-305 Ceiling Sensor combines the benefits of passive infrared (PIR) and ultrasonic technologies to detect occupancy and reduce false triggers. Sensors have a flat, unobtrusive appearance and provide 360 degrees of coverage. They easily mount to ceiling tiles or junction boxes. Ideal applications include classrooms, open office spaces, large offices, and computer rooms.

These WattStopper sensors use power packs for auto-on/off or low voltage switches for manual-on (both sold separately). In addition, the DT-300 family of sensors easily field modify to trigger lights on when either technology or both detect occupancy, or to require both technologies to hold lighting on. Once lights are on, detection by either technology holds them on. Lights turn off when occupancy is not detected for the length of the specified time delay.

• Sensors work with low-voltage momentary switches to provide manual control
• Patented ultrasonic diffusion technology spreads coverage to a wider area
• LEDs indicate occupancy detection
• Uses plug terminal wiring system for quick and easy
• Eight occupancy logic options provide the ability to customize
• Available with isolated relay for integration with BAS or HVAC
• BAA/TAA-compliant models available

PIR vs. Ultrasonic

PIR technology senses motion via a change in infrared energy within the controlled area. Ultrasonic uses 40KHz high frequency ultrasound.

Click here to shop other items compatible with the WattStopper DT-305 ceiling sensor or click here for a helpful video.

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