Add $175.00 for FREE shipping

Protect All Entries to Your Home and More
Magnetic Window & Door Contact
Wireless Magnetic Door / Window Contact Sensor
Wireless Magnetic Door / Window Contact Sensor
Item# 73933
Free shipping on orders over $175 - See Details


  • Magnetic contact used to monitor normally closed entry points such as doors and windows
  • Wirelessly communicates with a compatible home security system up to 300 feet away
  • Adjustable radio frequency settings and built-in technology prevent missed signals and transmission errors

Essential Info

Monitor doors, windows, gun cases, jewelry boxes, or just about anything that opens and closes. The Wireless Magnetic Door / Window Contact Sensor is a protective device that can send notification when the opening and closure of doors and windows occurs. It is designed to send a wireless signal to a compatible home security system when the contact between the transmitter and corresponding magnetic sensor is broken. Additionally, an LED light illuminates whenever the magnetic contact is broken. An Anti-collision algorithm prevents signal jamming by simultaneous transmission from multiple devices. This wireless sensor is powered by a 3.6 V Lithium CR-2-type battery, included, that typically lasts about three years. A weak battery will transmit a message during any status report the system completes.


What's Included

  • Magnetic Door/Window Contact
  • Battery
  • Instructions
  • More Info

    This protective device is typically used on entry points, such as doors and windows, that are normally closed. Each magnetic contact also features a connection for a hardwired sensor input, making it ideal for protecting multiple windows using standard contacts and only one wireless version. Enabled with a unique ID code, each magnetic door and window contact is available in several optional frequencies in compliance with international standards.



    Manufacturer Product No.:MCT-302
    Dimensions:3 3/16" x 7/8" x 15/16" (81mm x 22mm x 23.5mm)
    Weight:1.2 oz. (34g), excluding battery
    Battery Weight:0.45 oz. (13g)
    Operating Frequency:315 MHz
    Transmitter's ID Code:24-bit digital word, over 16 million combinations, pulse width modulation
    Overall Message Length:36 bits
    Alarm Inputs:2: one internal, one external, each with a separate 24-bit transmitter
    Auxiliary Input Circuit Type:N.C. / E.O.L., selected with DIP switch
    E.O.L. Resister Required:47 kilo ohms
    Message Repetition:Once every 3 minutes or one-shot, selectable via on-board DIP switch
    Supervision:Signaling at 60-minute intervals via reed switch or aux. input, including battery supervision
    Tamper Reporting:Every 3 minutes until restored
    Power Source:3V Lithium CR-2-type battery, Panasonic or Sanyo only (not included)
    Battery Life Expectancy:3 years (typical use)
    Operating Temperature:32° F to 120° F (0° C to 49° C)
    Standards:FCC compliant

    Important notes:
    Only merchandise credit for defective items returned within 30 days of purchase. No other returns allowed on this item.
    Manufacturer contact information: Visonic Inc, Tel: (860) 243-0833


    75 Ratings
    5 star: 67%  (50)
    4 star: 19%  (14)
    3 star: 8%  (6)
    2 star: 3%  (2)
    1 star: 4%  (3)
    Average Customer Rating
    (75 customer ratings)
    Share your thoughts with other customers
    SEAN -- bellaire, TX   11/30/2009
    Easy to set up. Didn't realize that a tamper signal is initiated even when the system is disarmed until the system started making phone calls while I attempted to shut it down to change one of the jumper switches inside.
    JOSHUA -- boise, ID   11/18/2009
    A little on the bulky side but no other complaints.
    PATRICK J -- abingdon, MD   8/29/2009
    I've been using these contacts for 6 years now. They are consistent performers!
    EUGENE -- henderson, NC   8/20/2009
    Very easy to install except on mobile home sliding glass door where you couldn't put screws. Some heavy-duty double-sided mounting tape seems to have solved that problem.
    RICHARD -- philadelphia, PA   8/6/2009
    Contacts are very large,much larger than the normal contacts with other systems.Directions were unclear on assembling and installing the diode if needed.
    JAY -- high springs, FL   6/12/2009
    Work great, easy install.
    NANCY -- laredo, TX   5/21/2009
    contact sensors are working well
    EDWARD -- tracy, CA   5/6/2009
    These wireless contact Sensors are very versatile, very sensitive and preform very well.
    DOUGLAS -- white river jct, VT   3/13/2009
    fine - except the battery is not the same part as the older models of the same switch. CR2 new/TL5902 old.
    MARC -- portland, OR   2/26/2009
    works perfectly as expected. easy to configure
    D O -- laurinburg, NC   1/31/2009
    Small, sensitive, easy to install. Much better than any previous mag. contact I've had.
    PHILLIP -- georgetown, MA   1/2/2009
    very easy to install and so far have had no problems.
    Dave -- Southeastern North Carolina   12/20/2008
    VERY easy to install, and to configure to system. This unit is MUCH smaller than those in the system I had in my last house, at the same time it is much more sensitive and less likely to give trouble codes or require bypassing; clearly improved technology. The SecureLink system was simple to set up, and works well.
    TYLER -- frederica, DE   12/4/2008
    very easy to add to the existing security system
    DAVE -- sayville, NY   10/23/2008
    very good but still kind of big
    CHUNG -- bangor, ME   8/18/2008
    it would be nice to include shims for mounting doorways that have thick molding framing the door
    LUCYNA -- kalamazoo, MI   5/22/2008
    I have to rate as poor due to the SmartHome system is NOT user friendly for installation and use. I Severly regret purchasing this system
    ERIC -- seattle, WA   4/3/2008
    want more, good product
    JARED -- west rushville, OH   3/27/2008
    These pefectly. Now if you could just make the Alarm panel smaller.
    STEVEN -- friendswood, TX   3/23/2008
    Magnetic contact is too visable and a model tha can be embeded in the edge of the door and in the door jam would be very nice addition to the product line.

    Related Items

    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