Line Voltage Sensors - PDT- Ceiling Mount Sensor- Microphonic- Dual Technology
The Sensor Switch Patented Passive Dual Technology (PDT) Sensor was specifically designed to provide an economical approach to controlling private areas where physical obstructions prevent the sensor from having direct line-of-sight to the occupant. The PDT sensor combines Passive Infrared (PIR) technology with Microphonic (sound) technology to literally "See & Hear" the occupant.
SENSOR OPERATIONS:
The Passive Dual Technology Ceiling Mount Sensors control lighting through Sensor Switch power packs. The sensors turn on the lights when an occupant enters the room. The PDT products use PIR (Passive Infrared) and Microphonics in combination with a Fresnel Lens. The PIR portion of the sensor detects an occupant entering the room and turns on the lights. Once on, the Microphonic portion is engaged to detect occupant "noise". As an occupant moves within the field-of-view, the sensor detects a change in motion and temperature. Every time an occupant moves or noise is made, the time delay circuit is reset. Each sensor provides for an adjustable time delay from 30 seconds to 20 minutes. After a period of time the sensor will automatically time out, turning the lights off. A 10 second grace period is provided to voice reactiviate the system if needed.
SENSOR FEATURES:
The time delay is adjustable from 30 seconds to 20 minutes. It can be adjusted manually with a small precision screwdriver. The PDT Sensor features a Light Level output that can automatically turn off sections of lights based on the amount of ambient light present. The ceiling mount sensor also features a single pole, double throw isolated relay that can be interfaced with HVAC, EMS monitoring systems, and DDC systems. It has normally open and normally closed outputs and is rated for 1 Amp at 40 VDC.
INSTALLATION CONSIDERATIONS:
The PDT sensor was designed to be mounted in an indoor, air-conditioned, commercial environment. Recommended mounting height is 8 to 12 feet for maximum performance. The PDT line of sensors, unlike any other occupancy sensor, self-adjusts to it's environment. The Automatic Gain Control (AGC) feature allows the sensor to tune out constant background noise. However, changing noise signals like talking, shuffling of papers, and general human activities are readily detected. Avoid locating the sensor near HVAC air diffusers because the "noise" generated from the air flow will decrease the sensitivity of the microphonic sensor. Care should also be taken that the PIR collector beams do not view outside the controlled area.
Sensor Switch, Inc., 500 Turtle Cove Road Suite 215, Rockwall, TX 75087. Tel: 972-771-5990; Fax: 972-771-5764.