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Mounting the Detector

Once you have found a location that is within range of
the receiver, you can mount the WLS912L. 

1.

Remove the mounting plate from the detector.

2.

At the selected mounting location, place the 
mounting plate on the wall (with the tab facing 
down, or to the right), or on the ceiling. Mark the 
screw locations. Wall anchors should be used for 
all screw locations. 

3.

Secure the backplate to the wall.

4.

Slide the detector onto its backplate.

5.

Repeat the installation test using the AFT–100 
tester to confirm proper operation.

FCC Compliance Statement

CAUTION

: Changes or modifications not expressly approved by Digital Security Controls Ltd. could void your authority to use 

this equipment.
This equipment generates and uses radio frequency energy and if not installed and used properly, in strict accordance with the 
manufacturer’s instructions, may cause interference to radio and television reception. It has been type tested and found to comply 
with the limits for Class B device in accordance with the specifications in Subpart “B” of Part 15 of FCC Rules, which are designed 
to provide reasonable protection against such interference in any residential installation. However, there is no guarantee that inter-
ference will not occur in a particular installation. If this equipment does cause interference to television or radio reception, which 
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more 
of the following measures:
• Re-orient the receiving antenna
• Relocate the alarm control with respect to the receiver
• Move the alarm control away from the receiver
• Connect the alarm control into a different outlet so that alarm control and receiver are on different circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user 
may find the following booklet prepared by the FCC helpful: “How to Identify and Resolve Radio/Television Interference Prob-
lems”. This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402, Stock # 004-000-00345-4.

Limited Warranty

Digital Security Controls Ltd. warrants that for a period of twelve months from the date of purchase, the product shall be free of defects 
in material and workmanship under normal use and that in fulfilment of any breach of such warranty, Digital Security Controls Ltd. 
shall, at its option, repair or replace the defective equipment upon return of the equipment to its repair depot. This warranty applies 
only to defects in parts and workmanship and not to damage incurred in shipping or handling, or damage due to causes beyond control 
of Digital Security Controls Ltd. such as lightning, excessive voltage, mechanical shock, water damage, or damage arising out of abuse, 
alteration or improper application of the equipment.
The foregoing warranty shall apply only to the original buyer, and is and shall be in lieu of any and all other warranties, whether express 
or implied and of all other obligations or liabilities on the part of Digital Security Controls Ltd. This warranty contains the entire war-
ranty. Digital Security Controls Ltd. neither assumes responsibility for, nor authorizes any other person purporting to act on its behalf 
to modify or to change this warranty, nor to assume for it any other warranty or liability concerning this product.
In no event shall Digital Security Controls Ltd. be liable for any direct, indirect or consequential damages, loss of anticipated profits, 
loss of time or any other losses incurred by the buyer in connection with the purchase, installation or operation or failure of this product.

WLS912L
Glassbreak Detector

Available Models: WLS912L-433, WLS912L-900

Installation Instructions

The WLS912L is a battery-operated glassbreak sensor, designed to detect the sound
produced by the shattering of framed glass. Equipped with an RF transmitter, the
WLS912L establishes a supervised, one–way communications link with the system
controller. The WLS912L uses Dynamic Signal Processing* to provide accurate
detection of plate, laminated, wired and tempered glass types, while rejecting com-
mon false alarm sounds.

*Protected under US Patent 5,675,320

Specifications

Operating Voltage: 3.0V (two 3V Lithium batteries)

Operating Temperature: 0

o

C - 50

o

C (32

o

 F - 122

o

F)

Operating Humidity: 5% – 95% RH, non-condensing

Maximum detection range

Compatible control units/receivers: (P)NT9010-433, P(C)5132-433 or Envoy

Battery Guidelines and Installation

Use fresh batteries. Most batteries have a “best before” date printed on their 
packaging or on the batteries themselves. Buy batteries that have a “best 
before” date of two years or more from your purchase date

When disposing of used batteries, follow the instructions and precautions 
printed on the batteries. Many cities and communities have collection sites or 
services for used household batteries. Contact your municipal offices for 
information on the disposal of used batteries

Do not mix old and new batteries

Dispose of any batteries promptly, keep away from children

NOTE: Use only Energizer Lithium EL123AP, Tekcell CR123A or Panasonic
CR123A lithium batteries.  Use of any other battery may present a risk of fire or
explosion.
CAUTION:  The cell used in this device may cause a fire or chemical burn hazard if
mistreated. Do not recharge, disassemble, heat above 100°C
(212°F) or incinerate.
To install batteries:

1.

Remove the de

t

ector from its mounting plate: 

If unmounted

, hold the detector by its sides and push down on 

the top end of the mount-
ing plate, as shown at 
right.

If mounted

, press the 

detector in the direction 
shown below.

Glass Type

Thickness

Minimum Glass 

Size (L X W)

Level 1 
Setting

Level 2
Setting

Plate/

Tempered

1/8" – 1/4"

3 – 6mm

12" X 12"

30cm X 30cm

20ft

6m

10ft

3m

Wired/

Laminated

1/4"

6mm

18"X18"

46cmX46cm

20ft

6m

DO NOT USE

©2002 Digital Security Controls Ltd.
Toronto, Canada  •  

www.dsc.com

Technical Help Desk (Canada & US): 1-800-387-3630 
Printed in Canada   29005723 R005

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