STULZ Leak Detection Systems

EL3001 Control Panel

Easy to install, complete monitoring system to detect early liquid leakage. Once leak is detected it responds within a few seconds and provides accurate leak location.

General Features

  • Maximum accumulated length of sensing cable

    200m (Note: 192m for 4-20mA interface)

  • Maximum accumulated length of jumper cable


  • Precision of leak location

    +/- 1 metre or +/- 0.5%

  • Display

    LCD with backlight. 2 x 14 English characters

  • Audible alarm

    90dB max. buzzer with silencing button

  • System reset

    One single button for testing/resetting the system (hold down buzzer button for 6 seconds)

  • Failsafe operation

    Ability to operate in loop back operation and to detect liquid leakage during cable break

  • Time to detect leak/cable break

    4 seconds typically

  • Liquid leak detection capability

    Typically 20mm in length of liquid (e.g. tap water) in full contact with sensing cable. Leak sensitivity is adjustable.

  • Multi-leak detection and location capability

  • Modbus TCP optional

  • Remote supervision by RS485 Modbus optional

  • Analog output 4-20mA interface optional

  • ASIC based digital location principle (patent pending) with inherent temperature stability, zero drift and very low power consumption


Environmental Ratings

Operating temperature-10°C - 50°C (indoor installation only)
Storage Temperature-20°C - 70°C
Humidity5% to 95% non-condensing


Power Requirements

Power Supply230 +/- 15% VAC, 50/60 Hz
Optional Input115 VAC/ 50-60 Hz or 12 to 30 VAC/DC power input
Power Consumption3.5 VA / 3 W maximum


 Power Relays Switching Characteristics

Cable break/power failure by contact (1 relay)Operation - SPDT
Switching current - 3A at 250 VAC, 5A at 30 VDC
Liquid leakage dry contact (2 relays)Operation - SPDT
Switching current - 5A at 250 VAC, 7A at 30 VDC


Serial Communication Interface

Physical supportRS485-two wire, ESD and surge protected as per IEC 61000-4-5
OptionalModbus/TCP output with 10/100Mbs Ethernet and RJ-45 connector


Analog Output

Physical support4 to 20 mA opto-isolated interface

Voltage range

9 to 36 VDC overvoltage protected
Additional informationTwo-wire opto-isolated analog current interface with galvanic separation of 2.5kV
Nominal current

Normal - 4 mA
Cablebreak - 20 mA
Leak - 6mA plus 0.0625 mA per meter of leak location


Compliance to International Standards

EMC emissionIEC61000-6-3(2001)
Electromagnetic compatibility
Generic emission standard for residential, commercial and light industrial environment 
EMC immunityIEC61000-6-1(2001)
Electromagnetic compatibility
Generic immunity standard for residential, commercial and light industrial environment 


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