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Sensor Type
Motion / PIR / Occupancy
Pet Immune
Contact Closure / Relay
Ease of Installation
Intermediate (Installs < 60 minutes)
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Pet-Immune PIR Motion Detector Eliminates False Alarms
40 X 40 Pet Immunity PIR Detector
40 X 40 Pet Immunity PIR Detector
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40 X 40 Pet Immunity PIR Detector
40 x 40 Pet Immunity PIR Detector
Item# 76405
Price: Normally $24.99 
Hot Deal $22.44
Free shipping on orders over $175 - See Details


  • Quad Zone Logic provides pet immunity
  • Sensor detects IR energy changes in multiple zones for accurate detection
  • Temperature changes from small pets don't trigger alarm

Essential Info

Connect a motion sensor to your security system for immediate, accurate alerts when an intruder is detected in your home. With its 40' x 40' wide angle with 80' curtain pattern, the 40 X 40 Pet Immunity PIR Detector will keep an eye on a broad area of your home when your security system is armed, and unlike many standard motion detectors, this smart sensor won't be fooled by pets or other non-human movement.


What's Included

  • Motion sensor
  • Mounting hardware
  • Instructions
  • More Info

    The 40 X 40 Pet Immunity PIR Detector offers a multitude of features that prevent it from delivering false alarms. Optical Quad Zone Logic provides pet immunity to eliminate false alarms from objects 16 inches tall or less, while the 40 X 40 Pet Immunity PIR Detector also rejects false alarms caused by spot temperature changes such as small- to medium-sized animals, air conditioners, or moving curtains. Its high-quality spherical lens and dense detection pattern give the motion detector pet immunity superior to single-technology sensors.

    This motion sensor detects IR energy changes in multiple areas and then couples them for extremely accurate detections. Quad Zone Logic provides multi-segmented detection zones over the detection area. It is designed so that a human-size target will normally fill 4 to 8 zones, and this will cause an alarm to be generated. Any smaller temperature change (i.e.: small- to medium-size pets, rodents or moving curtains) only activates one or two zones at the same time, creating a much weaker detection signal. Pet immunity applies to animals 0 to 16 inches in height. These signals are further analyzed by the "ECO" chip and signal processing circuit for accurate detection of humans and avoidance of most small animals.

    Additional features include a sealed housing, which prevents drafts and insects from reaching the pyro element of the motion detector. For extra protection, try the 40 x 40 PIR/Microwave w/Pet Immunity Motion Detector, which also incorporates microwave technology with noise reduction to eliminate interference.



    Manufacturer Product No.:RX-40PI
    Dimensions:2.44" x 3.87" x 1.73" (62mm x 97mm x 44mm)
    Weight:2.5 oz. (70g)
    Detection Method:Passive infrared
    Coverage:40' x 40' (12m x 12m), 85°
    Detection Zones:78
    Mounting Height:5' ~ 8' (1.5m ~ 2.4m)
    Sensitivity:3.6° F (2° C) at 2'/sec. (0.6m/sec.)
    Detection Speed:1' ~ 5'/sec. (0.3m ~ 1.5m/sec.)
    LED Alarm Indicator:Switchable on/off
    Alarm Period:Approx. 2.5 sec.
    Alarm Output:N.C., 28VDC, 0.2A max.
    Pulse Count:Approx. 20 sec. 2 or 4
    Warm Up Period:Approx. 30 sec.
    Power Input:9.5 ~ 16V DC
    Current Draw:17mA (max.) at 12V DC
    Operating Temperature:-4° F ~ +122° F (-20° C ~ +50° C)
    Environmental Humidity:95% max.
    RFI Interference:No alarm 20V/m from 100MHz to 1 GHz
    Warranty:5 years, limited


    40 X 40 Pet Immunity PIR Detector       
    40 X 40 Pet Immunity PIR Detector       


    16 Ratings
    5 star: 62%  (10)
    4 star: 12%  (2)
    3 star: 6%  (1)
    2 star: 6%  (1)
    1 star: 12%  (2)
    Average Customer Rating
    (16 customer ratings)
    Share your thoughts with other customers
    STEPHEN PAUL -- medford, MA   11/1/2013
    It maybe pet immune but it is because it is less sensitive. If you open it up it is the same technology as every other motion sensor. Nothing special is going on. The pet immunity comes from just being less sensitive to all motion by warm warm blooded creatures.
    JONATHON -- milton, ON   7/30/2012
    Great Product!
    DAVID -- watkinsville, GA   5/7/2012
    This motion detector works great and performs very well. Its ewverything i expected.
    ROBERT M. -- marine on st. croix, MN   1/24/2010
    Seems like it will be a great value. It was easy to install, has unobtrusive appearance and demonstrates good sensitivity to motion over a wide area. I have not been able to evaluate the pet immunity capability as yet.
    RYAN -- oakland, CA   12/9/2009
    Works great. Pet immune as long as pets stay on the ground. Makes slight relay click noise when motion is detected. Overall GREAT value and quality product for the money.
    BRENT -- bakersfield, CA   4/23/2009
    Great product. Very small and easy to install.
    DAVID -- colorado springs, CO   10/23/2008
    Third time I have used Smarthome to order IR sensors - - in each instance - immediate shipping, on time delivery, fair price.
    DAVID -- colorado springs, CO   8/14/2008
    Great service; fast shipping; these detectors work as advertised
    DESTA -- mercer, PA   12/14/2007
    Worked well for ellectric door exit device
    JERRY -- hanover, PA   9/3/2007
    Look great, very small foot print.
    RON -- alpharetta, GA   7/19/2007
    the item replaced one that we had at home which appeared to be malfunctioning - it works as expected
    Paul -- Silicon Valley   6/8/2007
    Works fine but too loud to be installed in a quiet room.
    VINCENT -- doral, FL   5/21/2007
    The item worked as they were intended for. A great price for what the detector can do, it is too bad it cannot be used outdoors as the construct is not waterproof. However it is ideal for indoor/office use and is a huge plus with pets in the house. Will definitely recommend this product and will buy from Smarthome again.
    KENT -- fort scott, KS   3/6/2007
    Also another good product with it's sleek design, and user friendly installation.
    SERGIO -- cookstown, NJ   2/17/2007
    Works great. Easy to install
    JOHN -- mclean, VA   1/4/2007
    Worked great out of the box. Bought to replace a "similiar" unit which was "tripping" after 5 years of service.
    DAVID K -- baton rouge, LA   10/28/2006
    Installation was easy.


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