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The SeaHawk LD1000 single zone leak and water detection controller monitors up to 1,000 feet (305 meters) of sensing cable.  It is compatible with all SeaHawk sensing cables and SeaHawk SD-Z and SD-Z1 spot detectors.

As a stand-alone leak detection controller, the LD1000 features an audible alarm and three LED indicators.  It is ideal for small areas, facilities where the sensing cable or spot detector is exposed or leaks can be easily located, and areas where the audible/visible alarm can be easily noticed.  Plus, all LD1000 units are Modbus enabled so you can integrate them via Modbus output into existing monitoring systems.

Make Sure You Have An Isolated Power Supply!

RLE leak detection controllers, including the LD1000, require an isolated power supply. A power supply is not included with the LD1000. Purchase an RLE power supply – PSWA-DC-24-ST or WA-AC-24-ST.

Click here for more information about RLE leak detection controllers and isolated power supplies.

Key Features

  • Monitors up to 1,000 feet (305 meters) of leak detection sensing cable and/or spot detectors
  • Three LED indicators: Power, Leak, Fault
  • Modbus output for BMS integration (all units purchased after 3/1/2019)
  • Selectable audible alarm annunciation
  • Configurable for supervised or non-supervised operation
  • Adjustable sensitivity settings
  • Wall mount enclosure
  • Two Form C output relays for leak and fault alarms

LD1000 Specifications

Included Equipment: LD1000 controller, leader cable, end-of-line (EOL) terminator

Additional Requirements: RLE power supply, sensing cable and spot detector (as needed for application)

Power: Requires an isolated power supply for DC operation.

  • 24VDC (±10%) Isolated @ 300mA max.; requires RLE power supply PSWA-DC-24-ST (not included)
  • 24VAC (±10%) @ 300mA max.; requires RLE power supply WA-AC-24-ST (not included)


  • Leak Detection Cable: Compatible with SeaHawk sensing cables (not included)
  • Cable Input: Requires 15ft (4.6m) leader cable and EOL terminator (included)
  • Maximum Sensing Cable Length: 1,000 feet (305m) of sensing cable
  • Detection Response Time: Configurable for 10sec or 2min, ±10%, when used with conductive fluid or chemical sensing cables.

Relay Outputs: 1 Form C Leak Relay, 1 Form C Cable Fault Relay, configurable to 2 Summary Alarm Relays; 1A @ 24VDC, 0.5A resistive @ 120VAC; configurable for supervised or non-supervised, latched or non-latched

Communications Port

  • EIA-485: 9600 or 19,200 baud; Parity none; 8 data bits, 1 stop bit


  • Modbus (EIA-485): Server; RTU Mode; Supports function codes 03, 04, and 06

Alarm Notification: Audible Alarm 85DBA @ 2ft (0.6m); Selectable

Front Panel Interface

  • LED Indicators: Power: 1 green (on/off); Cable Fault: 1 amber; Leak Detected: 1 red
  • Push Buttons: 1: Quiet, Reset, Test

Operating Environment

  • Temperature: 32° to 122°F (0° to 50°C)
  • Humidity: 5% to 95% RH, non-condensing
  • Altitude: 15,000ft (4,572m) max.

Storage Environment: -4° to 158°F (-20° to 70°C)

Dimensions: 4.125″W x 5.5″H x 2.25″D (105mmW x 140mmH x 58mmD)

Weight: 27.0 oz. (765g)

Mounting: Wall mount

Certifications: CE; ETL listed: conforms to UL 61010-1, EN 61010, CSA C22.2 No. 61010-1, IEC 61326:1997; RoHS compliant

Product Documentation Links

Technical Resources

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