Add $50.00 for FREE shipping
Up to 20% Off Insteon Starter Kits!Free Shipping On Orders $50 And Up
Sensor Type
Glass Break
Battery Operated
LED Feedback
Visual Indicator
Wall Mounted
# of Gangs
1 Gang
Ease of Installation
Intermediate (Installs < 60 minutes)
Other Ways to Shop
In Stock
On Sale
Order the Smarthome Catalog

Trigger Your Security or Alarm System in the Event of a Broken Window
Visonic Glass Break Sensor Audio Discriminator and Detector, White
Visonic Glass Break Sensor Audio Discriminator and Detector, White
Visonic GFD-30 Glass Break Sensor Audio Discriminator and Detector, White
Item# 74003
Price: Normally $60.00 
Hot Deal $43.77
Free shipping on orders over $50 - See Details


  • Up to 50 foot audio detection radius range (varies based on conditions)
  • Coverage area up to 5000 square feet
  • Flush mount
  • LED indicator lights
  • Built-in tester

Essential Info

The Visonic GFD-30 Glass Break Sensor Audio Discriminator and Detector is a flush mounted, glass break audio discriminator sensitive to noises above a cutoff frequency of approximately 5 kHz. The unit is designed to fit into virtually any standard, single-gang electrical switch box. It can also be installed directly in to a prepared space in the wall without a box enclosure. The glass break sensor requires a hardwired 9V DC - 16V DC power connection. You can connect the Normally Closed Relay output to a normally closed detection zone of a home security system or integrate into a home automation system. A built-in potentiometer is located on the circuit board that allows you to set the optimum sensitivity to avoid false alarms triggered by things such as telephones an door chimes. The unit also features test and alarm LED indicator lights to help during the setup process.


What's Included

  • 1x -Sensor
  • 1x - Wall Plate
  • 2x - Mounting Screws
  • 1x - Owner's Manual
  • Specifications

    Manufacturer Product No.GFD-30 or GFD-30 0-1893-0
    Acoustical Detection RangeUp to 50 feet (15 meters) radius (adjustable- varies with room shape, acoustics, temperature and humidity
    Coverage AreaUp to 5,000 Square feet (500 square meters)
    Cutoff Frequency5 kHz (nominal)
    MicrophoneElectrical Condenser
    Electrical Voltage9V DC - 16V DC (protected against reverse polarity)
    Relay Output
  • Normally Closed (failsafe)
  • 18 ohm resistor in series with contacts
  • Rating: 0.1A resistive / 30V DC
  • Alarm Period2.3 Seconds
  • "ALM" LED lights on alarm
  • "DET" LED lights to indicate effect of ambient noises on sensor
  • TestingBuilt-in testet with ambient noise monitoring ("DET" LED)
    Operating Temperature14° F to 122° F (-10° C to 50° C)
    Storage Temperature-4° F to 140° F (-20° C to 60° C)
    Dimensions5.0" x 3.3" x 1.5" (125mm x 85mm x 39mm)
    Weight6.3 oz (180g)

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


    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