LC-5000

Powerful Leak Noise Correlator

Enigma® pinpoints leaks others miss—smart, powerful, and built to listen where it matters most.

Enigma® is an advanced digital correlation logger designed to accurately locate leaks in buried water pipes. By combining noise logging and noise correlation in a single operation, it streamlines the leak detection process and boosts operational efficiency. Ideal for both temporary and semi-permanent deployments, this “Lift and Shift” solution is a versatile tool for water network surveys. Enigma® features powerful 24-bit data processing and analysis, giving it a proven edge in detecting difficult leaks that other systems often miss. Its ability to take and analyze three distinct sound samples allows it to differentiate between regular consumer usage and non-revenue water loss, delivering highly reliable leak detection results.

Trouble free deployment

Enigma correlating leak noise loggers are deployed at multiple positions, typically on valves or hydrants, during normal working hours. They may be programmed for either daytime or night-time operation.

MULTI-POINT NETWORK CORRELATION

Enigma® loggers are deployed at multiple positions, typically on valves or hydrants, during normal working hours. They maybe programmed for either daytime or night-time operation. The loggers record the actual leak sound. When retrieved the leak sound is transferred to the host software where it is processed to display all leak positions between loggers. Programming and data readback utilises optical and USB communications to ensure rapid operation.

OPTIMUM LEAK SENSING

Overnight use provides ideal conditions for leak detection. This is because background acoustic noise from traffic, water usage and other sources, is lowest and, at the same time, water system pressure can be higher which greatly aids leak sound propagation.

TECHNICAL SPECIFICATIONS

Additional information

Main Processor Unit Operating Temperature Range

-10º to 140º

Main Processor Unit External Dimensions

10.7 inches (W) x 7.0 inches (D) x 3.2 inches (H)

Main Processor Unit Weight

Approx. 4.8 lb. (with batteries)

Main Processor Unit Battery

Lithium Ion (rechargeable)

Main Processor Unit Continuous Operating Time

8 hours minimum (at 20°C, backlight OFF)

Main Processor Unit Minimum Operating Voltage

4.2V

Main Processor Unit Input

Radio x4 or Cable x2

Main Processor Unit Display

7-inch TFT LCD with touch screen

Main Processor Unit Operation

Polarity correlation

Main Processor Unit Td Range

±50ms, ±100ms, d200ms, ±400ms, ±800ms, ±1600ms, 32000ms or automatic setting

Main Processor Unit Time Resolution

25 µs (in ±50ms range), 50 µs (in ±100ms range)
100 µs (in ±200ms range), 200 µs (in ±400ms range)
400 µs (in ±800ms range), 800 µs (in ±1600ms range)

Main Processor Unit Filter Range

THRU, 80Hz to 5,000Hz (4 low and 4 high)

Main Processor Unit Notch Filter

OFF, 50Hz, 60Hz

Main Processor Unit Auto Filter

Automatically selected from FFT operation

Main Processor Unit Data Memory

100 correlations

Main Processor Unit FFT Monitor

1kHz, 2.5kHz, 5kHz (common to both channels)

Main Processor Unit Sound Memory

For 16 seconds

Main Processor Unit External Interface

Antenna, Headphone, Power Switch, Cable, RS-232C

Red, Blue, Yellow and Green Pre-Amplifiers Temp Range

-13º to 140º F

Red, Blue, Yellow and Green Pre-Amplifiers Applicable Standard

IP68 (weather tight)

Red, Blue, Yellow and Green Pre-Amplifiers External Dimensions

3.14 inches (D) x 7.2 inches (H)

Red, Blue, Yellow and Green Pre-Amplifiers Weight

Approx. 6.3 lb. (with batteries)

Red, Blue, Yellow and Green Pre-Amplifiers Battery

Lithium Ion (rechargeable)

Red, Blue, Yellow and Green Pre-Amplifiers Continuous Operating Time

10 hours minimum (at 20ºC, backlight OFF)

Red, Blue, Yellow and Green Pre-Amplifiers Input

Input Frequency Range:
20Hz to 5kHz (at THRU filter setting)
100Hz to 5KHz (at STD filter setting)

Input Sensitivity:
50 micro V, max.

Signal to Noise Ratio:
35dB, min.

Red, Blue, Yellow and Green Pre-Amplifiers Radio Communication System

Output Frequency:
UHF under approved freq.

Modulation:
Direct frequency modulation

Output Power:
0.5W (500mW)

Output Impedance:
50ohms

Sensors Operation Modes

Correlation / Relay / Logger / Relay+Correlation

Sensors Sensitivity Settings

2.0 (1 to 20) Steps Manual & Auto

Sensors Filter Setting Modes

Common / Through

Sensors Recording

Audio signal recording (300 seconds, logger mode only)

Sensors GPS Function

Transmit position coordinates & elevation to the Main Unit

Sensors Weight

2.2 lbs.