Visonic DUO-240 360° Miniature Ceiling Mount Dual-Technology Digital Intrusion Detector
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Visonic DUO-240 360

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Redefine Reliability Using this Microcomputer-Controlled, State of the Art Miniature Intrusion Detector
  • The world's smallest ceiling-mount dual-technology detector
  • Suitable for home, office and other commercial applications
  • Easily installed in any ceiling up to 4.5m (15 ft)
  • Durable, sleek, and elegant design blends seamlessly into any decor
  • Optimized signal processing of both MW and PIR channels
  • True Motion Recognition for superior detection and ultimate false alarm immunity

Item #: 73966

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Special Price: $58.47

List Price: $90.72

Your Savings: $32.25

Frequently Bought Together:

Visonic DUO-240 360° Miniature Ceiling Mount Dual-Technology Digital Intrusion Detector

Special Price: $58.47

List Price: $90.72

Your Savings: $32.25

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Price For Both: $80.47

  • Details
  • Specs
  • Reviews
  • DUO-240 is the world's smallest, dual-technology, microcomputer-controlled, motion detector with advanced motion analysis. It has achieved superiority over other dual-technology sensors with its patented, breakthrough True Motion Recognition algorithm. By combining Infrared (IR) and microwave (MW) technologies the sensors is able to distinguish between true and false human motion, providing immunity against disturbances which would inevitably cause false alarms.

    The human body creates changes in its surrounding environment as it travels through this space. Heat is the most common change conventional motion sensors will detect. As a body travels across a motion detectors field of view, infrared (IR) radiation, or heat, is emitted allowing the sensor to detect this new presence. This technology, by itself, is not one hundred percent reliable because, human bodies are not the only cause for temperature change in a home. Hot air moving out of a HVAC duct, pets, and sun light heating objects in a bedroom are all examples of scenarios, in the typical home, that can trigger an alarm if the sensor is only detecting heat. Two specific changes allow the DUO-240 to accurately notify you of motion. One of these a thermal change, as in temperature, or heat. The human body creates the second change by shifting Doppler frequencies within a microwave (MW) field. The sensor inside of the DUO-240 is able to detect this change in the microwave field alerting you of this new presence. Safety, therefore Intrusion detection, is important everywhere, install these professional grade motion sensors in the ceiling of any home, office or commercial building


    The MW Motion Simulator circuit is another great feature of the DUO-240. This self-testing, simulation routine mimics the effects created by a human body moving in a microwave (MW) field. Periodically, the DUO-240 will test itself in order to ensure reliable supervision, and the proper operation of the microwave (MW) detector. Motion is detected in a 360° pattern with 10.8 meters of floor coverage. The Fuzzy Logic and "Event Verification" algorithm protect against false alarms with optimized signal processing of both MW and PIR detection technologies.


    Note:Mounting this device on a lower ceiling will reduce the coverage area. This device is intended to be connected to a compatible listed burglar alarm control unit, or power supply with an output voltage range within 9-16vdc and that provides a minimum of 4 hrs. stand-by power. Use RTV to seal the base opening(s) to prevent insects from entering the detector.

    • Input Voltage: 9 to 16 VDC (Nominal: 12 VDC)
    • Current Drain: About 30 mA @ 12 VDC
    • Detector: Low noise dual-element pyroelectric sensor
    • Trip Indication: Green LED flashes for up to 5 seconds
    • True Motion Event Verification Counter: 1 or 2 events
    • Detection Pattern: A virtually conical pattern of maximum 10.8 m (35 ft) diameter, when installed on a 4.5 m (15 ft) ceiling
    • Oscillator: Microstrip DRO-stabilized type
    • Frequency: 2.45 GHz
    • Detection Range: Adjustable from 25% to 100%
    • Trip Indication: Green LED lights for up to 5 seconds
    • Alarm Indication: Red LED lights for 2-3 s (both detectors trip)
    • Relay Contacts: Normally closed, 0.1 A resistive/30 VDC; 47 U resistor in series with contacts
    • Alarm Duration: 2-3 seconds (red LED lights and output relay contacts open)
    • Tamper Contacts: Normally closed, 50 mA resistive/ 30 VDC
    • Trouble Output: Open-collector, 100 mA max. serial resistor 47 U, pull-up resistor 47 KU (see Fig. 4)
    • Maximum Mounting Height: 4.5 m (15 ft)
    • Dimensions (H x O): 24 x 86 mm (3.4 x 0.95 in.)
    • Weight: 64 g (2 oz)
    • Color: White
    • Operating Temperature: -10°C to 50°C (14°F to 122°F)
    • RFI Protection: Greater than 20 V/m (20 to 1000 MHz)(Not UL investigated)
    • U.S. Patents 5,237,330 and 5,693,943 (other patents pending)
    • Compliance with standards: EN 50131-1 Grade 2 Class II, UL-639
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