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Trackit Proximity Sensor Switch Uses Patented Technology

The Only Multifunction Patented New Switch Technology in the Industry


  • Virtually Indestructible



  • Quickest Installation Possible
  • Replaces Existing Head Stop(Door Stop)
  • No Field Adjustment Required
  • No Drilling or Attachment Hardware Needed


  • No Mounting Holes Required
  • Door Latch Can Be Made of Non-Rusting Materials
  • No Attachment Hardware Needed


  • Isolated Wire Leads
  • Patented Floating Reed Technology


  • 60000 Switches Installed With No Failures
  • Lifetime Limited Warranty
  • No Door Readjustment Needed

This is a brief summary of the following information.

  1. Theory of an alarm system. All systems look for a normally closed circuit to arm the door and function properly.
  2. Theory of a reed switch. The norm in the alarm industry is to use a normally closed reed switch that opens when the magnet is moved away from the switch to trigger the alarm system.
  3. Descriptive write up of all alarm switches. The best location for a door alarm switch to be installed is at the top of the door track where the curtain and track stay tight at all times. This is also the hardest location to defeat and the easiest installation point(shorter exposed wire lead). The automatic functionality of the alarm system to arm a door is not lost by using an alarm switch that monitors the open and close movement of the door. The only way to properly secure a door is to monitor the open and close movement of the door.

The Trackit Switch idea came about in the early 1990s.  An electronics-based door alarm installation company in Houston had a hard time using existing alarm switch packages available at the time.  There were no switch packages available that were easily installed.  Reliability was also a major concern. 

The design of the Trackit Switch was done by an in-house engineering department using the experience of installation crews.  Consequently, a new switch package technology was developed.  Shortly after the design was tested a patent was applied for and granted.

Seven years of field application and 60,000 plus switches later the Trackit Switch is being offered at a very competitive price.  The Trackit Switch is the easiest roll-up door switch to install in the industry.  The Trackit Switch replaces the existing head (doorstop) using the same bolt and nut holding the original head stop in place.

There is no additional hardware (screws, bolts, rivets, etc.) needed that will damage the door roll-up curtain or hinder the smooth functionality of the door.   Years of reliable service make the Trackit Switch a major player in the door alarm market.  

Theory of an Alarm System

An alarm system is designed to signal a warning. In the storage industry, a warning is generally associated with the unauthorized opening of a tenant’s door. The best method for complete site control by a manager or owner is to have the alarm system automatically monitor the opening and closing of their tenant’s doors. The unauthorized opening of a door will sound a warning.

A storage facility door alarm system operates by disarming an individual door when the tenant enters a valid code at an entry keypad. The system is programmed to allow a short period of time for that tenant to get to and open the door. Once the door is closed the system arms itself after a short period of time or when the current code is entered at the exit keypad.

It is of the utmost importance for the alarm system to have an accurate signal from the sensor switch signaling when the door is opened and closed. In order for the alarm system to operate properly a sensor switch that monitors the opening and closing of the door is required. Using this type of sensor switch the alarm system will always arm the door when the door is closed and sound a warning when it is opened (regardless of the latch position).

Sensor switches that only monitor the movement of the door latch will not tell the automatic alarm system whether the door is opened or closed. The problem is the door could be closed but not latched. The facility’s alarm system will never arm the door to sound a warning when it is reopened. In many cases the problem is magnified due to the tenant locking their padlock with the latch still in the unlatched position.

A latch sensor switch makes the tenant responsible for not only shutting the door but also responsible for making sure the latch is slid completely into the door frame. Using this type of switch is burdensome for the manager of the facility and the automatic functionality of the alarm system is lost.

Using sensor switches that monitor the open and close movement of the door is the only correct method that allows the alarm system to secure the units on the property correctly.

The Theory Of A Reed Switch (Or Proximity Sensor)

A reed switch detects the presence of a magnet. The normally closed reed switch(figure #1 below) is actually a mechanical contact switch. The actual contacts are rarely noticeable because they are encased in a glass tube inside a housing.

There are two different models of a basic reed switch. The most common model of reed switch is a normally closed reed that is a closed circuit device. Door alarm systems require a closed circuit to function. With no magnet present the reed switch is open (figure #1). When the magnet is in close proximity the switch is closed (figure #2) making a closed circuit.

The range of distance that creates a closed circuit is called the gap. Removing the magnet from the closing proximity makes the contacts dislocate and an open circuit occurs(figure #3). An open circuit triggers the alarm system.

The other model is a normally open switch. When the magnet is in close proximity to the switch it opens. With no magnetic field in close proximity this switch is closed. The normally open reed switch works exactly opposite of a normally closed reed switch. The normally open reed switch is rarely seen in the alarm industry except in the Latch switch as explained below in figure #4. The normal application of a reed switch and magnet is to move the magnet away from the switch and create an open circuit. The norm in the alarm industry is to use a normally closed reed switch that changes state when the magnet is moved away from the normally closed reed switch. It is not normal in the residential or commercial alarm industry to try to interrupt the magnetic field with a metal latch to create a closed circuit.(figure #4) Doing so introduces too many variables by trying to control a magnetic field with a metal door latch.

Many reed switch configurations are available. The specific application warrants which package should be used.

Non-invasive Installation

Trackit roll-up door switch is the only completely non-invasive door switch on the market. There are no protruding screws, rivets, or bolts needed because the door stop is replaced with the new Trackit Door Stop assembly

Trackit Roll-up Door Proximity Switch

Trackit is proud to offer this innovative new product to the industry.

The Trackit roll-up door switch uses the appropriate application of a normally closed reed proximity switch. A virtually indestructible switch that is easily installed, very durable and dependable, does not need readjustment, and is difficult to defeat. No invasive screws used.

The most stable application of a normally closed reed proximity switch used in the alarm industry is to move the magnet away from the switch. The commercial and residential alarm industry routinely uses this application to properly secure an opening.

The Trackit switch assembly replaces the existing door stop, or head stop. The switch is part of the new head stop and is very difficult to bend due to its 12 gauge steel construction. There is no additional hardware needed to install the switch assembly and no protruding screws that will damage the door track or door roll-up curtain. After the door is installed there will never be readjustments needed by the door installer due to the alarm switch. The new patented technology enables the switch to be virtually indestructible. The magnet is glued to the door and stays in one place without harm to the door or the tenants as no screws protrude through the roll-up door track or curtain. There is no additional attachment hardware needed which makes the installation of the Trackit switch very quick and noninvasive. The upper track is the best possible location due to the track and door roll-up curtain being pulled tightly together during the full travel of the door.

An electronic engineering department and installation crews created this idea. After seven years of commercial installations and 60000 plus switches in the field, the Trackit switch has performed extremely well. High-grade, military-level components make up the Trackit roll-up door switch.

Easily installed, no protruding screws, and being virtually indestructible makes the Trackit roll-up door switch the best application for a storage facility door alarm installation. The Trackit switch arms the door even when the latch is not latched.

The scientific data and opinions on this website have been constructed by Trackit’s engineering staff.