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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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Don't Let Your Pets Prevent You From Securing Your Home
Visonic K9-40 Slimline Pet Immune PIR Motion Detector
Visonic K9-40 Slimline Pet Immune PIR Motion Detector
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Visonic K9-40 Slimline Pet Immune PIR Motion Detector
Item# 7481A
Price: Normally $22.99 
Hot Deal $20.29
Free shipping on orders over $175 - See Details


  • Immunity for pets up to 40 pounds
  • One- or three-pulse count
  • 30 x 30 ft. coverage
  • Advanced RF protection up to 1GHz
  • Enhanced high & low temperature compensation

Essential Info

You don't have to sacrifice the security of your home because you own pets. With most ordinary motion detectors, a dog or cat can easy trip the sensor and cause a false alarm. With most cities cracking down on residential false alarms, you could face stiff fines, or be put on a "do not respond" list by local law enforcement.

It Won't Confuse Your Pets for Burglars
The Slimline Pet Immune PIR Motion Detector is an updated version of a motion sensor we've sold for years. This new model contains an advanced pet immune PIR detector element and lens system. Using TSI™ (Target Specific Imaging) technology, the detector ensures immunity to pets weighing up to 40 pounds (18 kg).


What's Included

  • 1x - Slimline Pet Immune PIR Motion Detector - K9-40
  • More Info

    Reliable Operation
    The detector is also notable for its high stability, enhanced RFI protection (greater than 30 V/m), and high-temperature compensation for maximum "catch" performance and unique low-temperature compensation for optimum false-alarm rejection. The pyroelectric sensor is enclosed in a sealed chamber, protected from insects and air drafts.

    Adjustable Sensitivity
    For maximum flexibility, the sensor can be switched between one and three pulses. (A pulse is a detection by the PIR element.) This allows the sensor to be operated in a maximum sensitivity mode (one pulse) or is a less sensitivity mode (three pulse) where three specific detections are needed before the sensor signals the alarm panel that it has detected motion.

    Other Features
    Other features include a walk-test LED that allows to you to test the coverage area (the LED may be disabled during normal operation). A tamper detection circuit can be connected to your alarm panel to alert it in case anyone tries to open the sensor. Variable height adjustment allows the sensor to achieve maximum sensitivity when mounted on walls between 6 and 8 feet from the floor.

    Works with all hardwired alarm panels. Wires up as a normally-closed zone.

    The Slimline Pet Immune PIR Motion Detector can be directly screwed to the wall. However, if precise directional positioning is required, use these swivel brackets:

  • Swivel Wall Mount Bracket (#7481B1)
  • Corner Mount Wall Bracket (#7481B2)
  • Swivel Ceiling Mount Bracket (#7481B3)

  • Specifications


    Manufacturer Product No.:K9-40
    Max. Coverage Range:30 x 30 ft.
    Pet Immunity:Immune to animals weighing up to 40 lbs.
    Vertical Adjustment:3-position adjustment scale:
    6 ft, 7 ft, 8 ft
    Current:17 mA @ 12VDC
    Alarm Output:Normally closed (fail-safe)contacts. 18-ohm resistor in series with contacts. Rating - 0.1 Amps resistive/30VDC
    Tamper Output:2-3 seconds
    Pulse Counter:1 or 3 pulse operation
    LED:Walk-test enabled or disabled with internal link
    Detector:Dual-element low-noise pyroelectric sensor
    Mounting:Surface or corner (without brackets)
    Mounting Height:6 to 8 ft.
    Operation Temperature:14°F to 122°F
    Dimensions:4.1"h x 2.4"w x1.3"d

    Important notes:
    Defective exchanges for identical item within Manufacturer’s warranty period.
    Manufacturer contact information: Visonic Inc, Tel: (860) 243-0833


    Internal Connections/Options       
    Internal Connections/Options       


    53 Ratings
    5 star: 47%  (25)
    4 star: 21%  (11)
    3 star: 19%  (10)
    2 star: 4%  (2)
    1 star: 9%  (5)
    Average Customer Rating
    (53 customer ratings)
    Share your thoughts with other customers
    BERNARD -- rosedale, NY   5/8/2013
    this is the same unit i already have installed elsewhere in my home. works great, setup was flawless.
    STEVE -- salt lake city, UT   2/3/2013
    I've only used this unit in a test mode, to date, but it has exceeded my expectations for the price.
    GREGORY -- middletown, OH   10/15/2012
    This was not compatable
    RICHARD -- norridgewock, ME   6/25/2012
    Can't get the CPU to recognize it, but the unit itself appears to function as designed.
    DAVID -- east lansing, MI   6/12/2012
    More of the same order, again used to get automated ongoing measures of rough activity in lab animal (rodent) studies.
    DAVID -- east lansing, MI   6/12/2012
    Good compact low-cost motion detector. We use a few dozen of these in our lab animal (rodents) studies to get automated ongoing measures of rough activity.
    Bob M -- anchorage, Alaska   2/12/2012
    Great little unit. I have two of these hooked up to a Sensaphone Web600. They do a excellent job of detecting motion without picking up my little Jack Russel Terrier. I use these motion detectors with my Sensaphone to let me know when my kids have arrived home from school and to let me know if anyone is messing around in my computer room. These units don't come with a power supply or mounting bracket so be sure to order those if you buy one. Otherwise you will have to drill holes in the plastic case in the pre-marked spots in order to mount them to a wall. You can't beat the price/performance of these units.
    dkumpula -- fort mill, SC   5/17/2011
    I've had one of these detectors working for more than four years on a system that is used heavily and it has yet to have a single false alarm - nor has it ever missed someone entering the area.
    TAMAS -- graasten, XX   4/13/2011
    Compatible with my older CORAL system from Visonic, works excellent
    BRUCE -- sunnyside, NY   4/6/2011
    It works well and is unbelievably affordable. It does require a 12v.DC source and you do need to pay attention to the power polarity.
    DAVID -- mosinee, WI   2/6/2011
    East install, nice corner mount
    JAMES -- wayne, WV   12/24/2010
    great product-timely shipping-easy hookup. thanks
    ANTHONY -- garden city, NY   7/26/2010
    I can not use this item. I didn't know it requires a seperate 9-16 volt power supply.
    GLENN -- san antonio, TX   4/3/2010
    everything perfect
    TOM -- eden prairie, MN   1/17/2010
    Nice PIR sensor, very straightfoward installation. Sensing range is very good.
    WILLIAM -- dunnellon, FL   11/19/2009
    Used it to cover a small bedroom 12x12. Installed in corner near ceiling. No pets. Good motion detection. Good quality for the price. No look down.
    CHRIS -- wellsboro, PA   10/2/2009
    Makes a little bit of a clicking sound when activated, and can go off multiple times within a few seconds. Detects well, works as designed.
    Luis -- queens, NY   9/27/2009
    They work great. I installed two of them inside my friend's three car garage. I have them in my home as well. Sensitivity is just right, picks up all movement in coverage area, except rottweiler's movement. I have been installing alarms for about 5 years now and never had a problem with these. Read instructions and take your time. Freelance alarm installer, retired NYPD Detective.
    Doug -- Detroit   9/17/2009
    Sensors work well but the pet immune failed miserably with my 35 pound pit bull. Not one but all three detected the dogs movement at various heights and locations. Using both one and three pulse settings. I solved the problem by carefully apply black electrical tape covering the lense. By the time the sensors were working flawlessly without false pet detects I had the lense covered about 1/8 inch above center. This was applying the tape from the bottom of the lense up. This left the top of the lense open allowing human detection.
    JOSEPH -- barnesville, PA   9/17/2009
    Not as sensitive as comparable motions but the price can't be beat. Greqt if you have pets... less chance of false alarms.


    Swivel Wall-mount Bracket For Pirs  Swivel Corner-mount Bracket For Pirs  Swivel Ceiling Mount Bracket For Pirs   
    Swivel Wall-mount Bracket For Pirs  Swivel Corner-mount Bracket For Pirs  Swivel Ceiling Mount Bracket For Pirs   

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