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Understanding Acoustic Leak Detection
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Using the LD-18 on site LD-18 Digital Water Leak Detector
LD-18 product pieces
Standard Items
1 Amplifier with LCD Display, Controls, and USB Connection (to PC Computers)
2 Padded Case for Amplifier
3 40 inches Belt (50 inches and 60 inches Optional)
4 Ground Microphone and Handswitch
5 Magnet Base and Nutdriver

Standard Items
6 Heavy-Duty ABS Plastic Carrying Case
7 Aviation-Grade Stereo Headphones
8 PC Software and USB Cable
9 Sensor with Strong Magnet and 9.75 ft. Cable (to listen at valves and hydrants)

Features

All-digital amplifier with automatic noise reduction of intermittent sounds, high and low filters, storage and graphing of sound levels at different locations on the pipe, bar graph and numeric display of sound loudness, USB connection, and back light.

LD-18 Amplifier
LD-18 Amplifier showing filter settings, bar graph and numeric display of sound loudness, and minimum sound level detected

Automatic noise reduction capability for intermittent noises such as pedestrian footsteps, people talking, and passing vehicles.

5 High Frequency filters, 3 Low Frequency filters (plus Low filter OFF), and 2 Notch filters (plus Notch filter OFF) to remove continuous interfering noises from A/C hum, motors, wind, etc.

Storage and graphical display of the leak‘s loudness at multiple locations along the pipe.

LD-18 Amplifier with Peak Display
The “Saved” data file showing 10 leak sound levels and graphical display. Leak is at the peak sound level in the center.

Specifications
AMPLIFIER  
Combined Sensitivity
and Amplification
:

900 V/G or higher
(at 400 Hz)

Low Filters
:
Off, 100 Hz, 200 Hz, 400 Hz
High Filters
:
400 Hz, 600 Hz, 800 Hz,
1200 Hz, 2200 Hz
Notch Filters
:
Off, 50 Hz, 60 Hz
Maximum
No. of Sound Levels Saved
in File
:
250 (by date and time)
Power
:
4 C dry cell batteries
Battery Life
(continuous use)
:
24 hours minimum
Weight
:
35 ounces (including 4 C batteries)
Size
:
6.4" x 3.0" x 5.7"
    (163mm x 76mm x 145mm)
Weather Resistance
:
IP52 equivalent
Temperature Range (Working)
:
Minus 4 F to
Positive 130 F
SENSOR  
Type
:
Piezo electric ceramic
Weather Resistance
:
IP67 equivalent (3 ft water depth for 30 minutes)

Standard Base

:

3 - Pronged Plate(removable with nutdriver)

LD-18 Datasheet

Download
PDF of
LD-18
brochure
(953 KB)

More LD-18 Information:

LD-18 Operating Instructions

Pinpoint Water Leaks with LD-18

5 Year Warrranty

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© 2009 SubSurface Leak Detection, Inc.

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