Add $50.00 for FREE shipping
Sensor Type
Motion / PIR / Occupancy
Pet Immune
Contact Closure / Relay
Visonic (PowerCode)
Ease of Installation
Intermediate (Installs < 60 minutes)
Other Ways to Shop
Customer Favorites
In Stock
On Sale

Secure your Home While Allowing Pets to Move Freely Anywhere in the House
Visonic K985MCWP 85 lb Pet Immune Digital Motion Detector
Visonic K985MCWP 85 lb Pet Immune Digital Motion Detector
Click for larger image and other views
Visonic K985MCWP 85 lb Pet Immune Digital Motion Detector
Item# 73946
Price: Normally $109.99 
Hot Deal $108.86
Free shipping on orders over $50 - See Details


  • Pet-Tolerant for animals up to 85 lb (38 kg)
  • Compatible with PowerMax and all Visonic PowerCode wireless panels and receivers
  • 3 Volt long life high power Lithium battery
  • Industry's best catch performance based on proprietary Target Specific Imaging and 3D cylindrical optics
  • Ultimate false alarm immunity based on patented True Motion Recognition
  • 12m (40 ft) 90° multiple-curtain coverage with "wall" creep zone

Essential Info

The K9-85 MCW from Visonic is a PowerCode wireless digital Passive Infrared (PIR) sensor that allows you to secure your home while allowing pets to move freely. Using Visonic's patented "Target Specific Imaging" optical system and unique pet identification software algorithm, the K9-85 has an unprecedented capacity to reliably distinguish between human bodies and pets weighing up to 85lb (38 kg). This sensor is a fully supervised wireless detector with anti-collision PowerCode technology. It is compatible with PowerMax and all Visonic PowerCode wireless panels and receivers.

The K9-85 MCW implements a whole new generation of patented technologies including FM Digital Signal Processing (FM-DSP), "True "Motion Recognition" with Fuzzy Logic algorithm" (TMR), and state-of-the-art 3D cylindrical optics. The result is the industry's best detection accuracy, false alarm immunity, and ultimate long term reliability - in an attractive, easily installed wireless detector designed for any pet-loving home environment.


What's Included

  • 1x - K9-85 MCW Sensor
  • 1x - Owners Manual

  • Specifications

    Manufacturer Product NoK985MCWP
    Important notes:
    Defective exchanges for identical item within Manufacturer’s warranty period.
    Manufacturer contact information: Visonic Inc, Tel: (860) 243-0833




    22 Ratings
    5 star: 41%  (9)
    4 star: 36%  (8)
    3 star: 9%  (2)
    2 star: 9%  (2)
    1 star: 5%  (1)
    Average Customer Rating
    (22 customer ratings)
    Share your thoughts with other customers
    Tihomil -- Croatia   11/11/2013
    I have two PIR K9-85 MCW detectors. Neither of them works when temperature falls below 5 C 41 F. Does anybody have that problem?
    jdeg -- philly, PA   7/18/2012
    I have two of these sensors and unfortunately I rarely use them because my cat will set them off. The one near my front door also points at the steps, and I was told that an animal coming down the steps is what would set them off. There is no other way I could configure the sensor to not point at the steps though, while still monitoring the front door.
    GUNNAR -- santa clara, CA   12/22/2011
    Has the RF ID code on the label so it is compatible with the Visonic Amber Selectx as sold by Smarthome. The "PERS" designation should be added to the model number so it is clear the RF ID code is there, as is the case on the Visonic Web Product site.
    Cliff -- mansfield, OH   8/24/2011
    I've had three in use for nearly a year. I have yet to get a false alarm and we have pets. One is out in the yard at a storage shed and appx. 50 feet from the control panel through 3 inside walls and one external brick wall. And here in Ohio we have wide extremes in temperature 0 F to 95 F. All sensors have worked flawlessly. I can't imagine a simpler or easier to install motion detector. However, as I said in an earlier review, you can't mount it high in a corner of a room because the screw to open up the unit and change the battery is on top, so you need room to get a screwdriver in there above it. I suppose you could install it upside down but that may affect its function.
    MARK -- pineville, NC   4/29/2011
    Just needed an extra. It works like the others.
    Ray -- Sun Valley Nv near Reno Nv   4/20/2011
    I have three of these in my system, the one that I am writing about is in my garage, its furthest one from the panel and the signal has to go through two walls in my home, and if I don't disarm the alarm before I go into the gurage it will set it into alarm, so I know they work very well, and easy to enroll into the systm.
    RAY -- brodheadsville, PA   2/20/2011
    I have several and they all work as advertised.
    RAYMOND -- maplewood, NJ   1/20/2011
    I have successfully and happily installed two of these elsewhere in my home, both relatively close to the central station. The 3rd one has been nothing but problems. Its location is the furthest wireless device from the central unit, but still only about 30 paces from the unit, but through a bunch of twist and turns through hallways. Originally I thought I had a defective unit, but after receiving two replacement units from Smarthome I've concluded that the device just doesn't work too well when it doesn't have a clear path to send its signal. What makes the process more frustrating is the misleading error messages and symptoms you get. In conclusion, when close and clear lines, read less than 20 feet, it works very well. Beyond that and it is very unreliable. After 3 different units I think it is safe to say it is not an anomaly.
    CLIFF -- mansfield, OH   10/15/2010
    You can't mount the unit in the top corner of a wall because to change the battery you have to remove the screw at the top of the unit. Engineering issue. But it works fine and the pet-immune filter works perfectly!
    EDWARD -- sicamous, BC   9/19/2010
    They work as avertised.
    SUSAN -- harrison, OH   7/6/2010
    Replacement was handled efficiently by customer service.
    BONNIE -- pittsburgh, PA   2/1/2010
    Seems to work as described. No issues so far.
    JULIE -- honolulu, HI   1/11/2010
    Seems to work well. We noted that its a little less sensitive in bright areas, like my living room where there are lots of windows.
    ERWIN -- doral, FL   1/5/2010
    good time delivery
    PAUL -- anderson, IN   1/5/2010
    I have 4 of these installed. I have no pets to test out the pet immunity, but they have been reliable. I have noticed that the detection area does extend at least a little above the area shown in the manual (I set off the 1st floor detector while going by the 2nd floor balcony). I just wish they make a simple and small wireless motion detector for small rooms.

    Related Items

    Customers Also Bought

    Sign-up for Exclusive Email offers 
    How to Order Track Your Package Shipping Returns Contact Us Customer Service Retail Store
    Getting Started Learning Center FAQ Dealers Customer Testimonials Affiliate Program
    About Us INSTEON Press Awards Employment Guarantees Security & Privacy
    Free Catalog Email Newsletter Forum RSS Site Map
    Have questions? Call us at 800-762-7846 (Mon-Fri 5am-7pm and Sat 6am-3pm PT) or send us a message
    Place your order by 3pm PT for same day shipping
    Copyright 1995-2014 SMARTHOME™
    Verisign Secure Site PayPal Acceptance Mark