MIER DA-500 System DA500 Control Panel Mier DA-500CP Mier Driveway Alarm Probe
Mier Products
SKU: DA500

Mier DA500 Drive-Alert Wired Vehicle Driveway Alarm

  • Description

    MIER DA-500 Vehicle Detecting Driveway Alarm System

    Have you ever been surprised or startled by an unexpected visitor at your door?  Or have you had a frustrated customer waiting at your drive-thru?  With the Mier DA-500 Drive Alert, you will always get an early warning of vehicles entering your driveway, drive-thru or property. 

    The DA500 vehicle detecting driveway alert is perfect for use in residential driveways, on farms, drive-thru, commercial applications or in remote locations. This multi-purpose wired vehicle detecting alert system is designed to detect only vehicle traffic and ignore nuisance alerts from people or animals. 

    Since it detects larger moving metal objects, it can also be used as a security device to detect the movement of a garbage bin, boat trailer, tractor trailer.  You'll know if these items are moved when not expected.


    The Mier Drive Alert works by sensing the changes in magnetic field when a metal object moves near the metal sensing probe. The sensor probe is buried approximately 6 inches deep, along side or underneath the driveway or area being protected.

    When a vehicle moves or passes by the sensor, a signal is sent through the probe's cable to the included Mier control panel, activating a whistle sound to alert you or our staff. 

    With a simple adjustment at the control box, the sensitivity of the sensor’s operating range can easily be altered.

    This vehicle alert system is wired, so there are no batteries to worry about and no wireless range interference concerns.  You can install the vehicle detecting probe as far away from the control box as the cable length allows.

    Systems are available with varying cable lengths from 10’ to 2000 feet. 

    The control panel has a relay and voltage output to connect remote whistles, chimes, sirens, strobes, lights or other accessories. 

    Contact us if you need information on connections.

    The DA-500 Drive Alert Driveway Alarm System is the security industry's most reliable and most-often used method for detecting a vehicle when it enters a driveway.



    • The whistle sound is meant to get your attention.  Mier offers a 'Pleasant Chime' accessory, part number DA655 that can be used instead of or in addition to the built in whistle sound.  Up to 3 wired DA655 chimes may be used.
    • To add a wireless chime option, part number DA-REPEATER wires to the control box and you can add one or more DA100CP wireless chime receivers up to 1000 feet away (max line of sight).



    We can help you build a custom package that includes one or more additional chimes, external sirens, strobe lights,  We can also show you how to turn on a room or outdoor light when the driveway alert is triggered.  For more information please reach out to us by email or give us a call.


    Common Driveway Alarm Applications

    Mier Driveway Alarm

    Protecting the home

    The Drive Alert allows homeowners to know when someone enters their driveway. The out-of-sight sensor detects moving objects in a nominal range of eight feet on either side of the sensor and sends a signal to the master control unit, which sounds an electronic whistle.

    Preventing theft

    The sensor, when placed alongside a stationary metal object (such as campers, farm tractors, RV's, boats, or gasoline tanks) will detect any movement of that object and sound an alarm, aiding the prevention of theft and vandalism.

    Drive-Up or Drive-Thru Window Applications

    Restaurants, banks, pharmacies and other businesses that utilize drive-up windows can use the Drive-Alert unit to signal a customer’s arrival.

    Mier Drive Alert

    Enhancing safety

    Industrial safety is improved by using the Drive Alert unit at busy or blind intersections, helping to prevent accidents by signaling the movement of vehicular traffic in these areas.

    We also offer various accessories for the DA-500 Drive-Alert unit, which can enhance the effectiveness and versatility of the system.

    DA500 is the Vehicle Detector Drive Alert Used by the Security Industry

    MIER DA-500 Driveway Alarm Specifications

    • Vehicle probe senses moving cars, trucks, vehicles or moving metal objects
    • Loud on board whistle with on/off switch
    • Output -- 24 VDC at 100 Milliamps or: Dry Contact Relay - 24V/1AMP Maximum
    • Surge protected from transients
    • Adjustable sensor sensitivity
    • Adjustable time control for electronic whistle
    • Red LED power-on indicator

    MIER DA-500 Driveway Alarm Includes

    • Commercial quality Master Control Panel
    • Plug-in power transformer and cord
    • Two-conductor shielded direct burial cable in the length selected
    • Weatherproof vehicle metal sensor

    MIER DA-500 Driveway Alarm Support

  • Reviews



    This product is the answer

    After first trying an infrared motion sensor on our long laneway and having critters trigger it, I installed this product and it has performed flawlessly. I installed the wired system myself and added a relay to activate the doorbell in the house. It helped being an electrician but it was really not complicated.

    Excellent product

    After lots of research and reading we settled on the DA-500 with several upgrades. The sensor wire (300') was run in conduit for protection (1 1/2 inch for sensor then 1/2" for wire). The system works great and once all upgrades are done we will have an outside bell, outdoor lights, indoor lights, and indoor chimes. Pros: Almost unlimited ability to expand wired / wireless items. Easy to follow installation instructions. Durable constructed steal casing. By far the best tech support I have ever talked to with people that know the system without having to read a web page to give you help. Cons: If you plan to use the built in buzzer it is hard to hear (not a con for us because we did not plan to use it but you should be aware of it). You can use either the wireless sensor (DA-066) which needs contacts or a powered item like the DA-505 for lights, but not both without adding a relay (DA-500LKA) which is not clearly explained anywhere. Conclusion: A great system and well worth the cost. My only complaint is not knowing I needed the relay (DA-500LKA) to run the DA-066 and DA-505 at the same time until I talked with tech support. This should be documented better and Absolute Automation should be able to flag a purchase in advance and advise the customer of the need.

    Good Product

    This alert works just as it should. I am happy with this purchase !

    Does exactly what it says.

    I got this to help automate a customers island home. When a vehicle comes down the driveway, the automation system senses the relay outputs, and kicks on the outdoor lights, illuminating the path and eliminating any surprises. Also, deliveries and any other vehicles can trigger other events like email alerts (depending on your logic within your automation system).

    not for people with hearing problem

    We are still trying to get unit loud enough for us to hear - it's a very high pitch; ok for me but husband had too many years of factory work so high pitch sounds are not audible to him. Was work to install 200' cable but agree, it was worth it - better than a dog!

    American made............quality

    I agree with others. This seems to be an excellent product. My unit has been in service for only a couple weeks and it does the job. I gave it only 4 stars due to the fact the whistle built into the control panel is not very loud maybe 40db but you can add additional whistles or purchase the chime with volume control. Set up was easy except for burying the probe but that was expected. I called technician to determine options for chime and he was very polite and helpful. I had purchased a different brand of wireless alarm and within 2 year period it failed 3x. If this unit continues to perform in the coming months then it will have been money well spent.


    Rhianne & Mark

    Got my excercise and a great product too!

    While burying the probe and wire was a little bit of work - the end result was well worth it! We've had this unit for months now without a hiccup - thanks again!
    Marty McDonald

    Rock solid!

    I am very impressed with how rugged this system is. The controller is in a steel box that looks bullet proof! Very easy to set up and it hasn't missed a car yet and best of all..no false alarms! A little more work to install compared to wireless but no batteries or maintenance..very pleased!
  • Details


    Current Stock:
    SKU: DA500
    UPC: 612212010151
    Wired or Wireless: Wired
    Sensor Type: Magnetic Probe
    Wireless Range: N/A
    Relay Output: Form C (N.O and N.C) OR 24VDC
    Special: Rugged Steel Casing - Industrial Grade System
  • Warranty


    One Year
  • Videos