RLE LD2100

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RLE LD2100


The SeaHawk LD2100 distance-read leak detection controller monitors up to 5,000 feet (1,524 meters) of sensing cable.  Robust and web-accessible, it is compatible with all SeaHawk sensing cables and the SD-Z spot detector.


Designed to monitor large facilities and complex leak detection networks, the LD2100 can be configured as a Modbus master in systems with multiple RLE leak detection controllers.  It can easily integrate into existing facility monitoring systems and can be configured for direct notification via email.  The LD2100′s firmware includes a user configurable map which, when a leak is detected, will visually indicate the location of the leak on the map.


The LD2100 is ideal for monitoring large leak detection networks, facilities with raised floors, museums, libraries, data centers, clean rooms, telecommunication centers, and other critical areas.


Note: The LD2100 requires an isolated 24 volt power supply. RLE recommends and stocks PSWA-DC-24, a 24VDC supply that plugs directly into a wall outlet. This supply is available for purchase separately.


Technical Specifications

Key Features

  • Monitors:
    • up to 5,000 feet (1,524 meters) of conductive fluid sensing cable and/or spot detectors, or
    • up to 3,500 feet (1,067 meters) of chemical sensing cable
  • Interactive web-based leak detection map – avoid costly damage and downtime with fast leak notification
  • Adjustable leak, delay, and contamination thresholds
  • Identify cable disconnects & breaks
  • Thirty-two configurable zones allow users to label unique areas for quick identification
  • SNMP, Modbus, BACnet, and summary relay output allow for simple integration with BMS, NMS, & BAS
  • SMTP (email) notification of alarm conditions
  • Audible alarm
  • No factory calibration required
  • Annunciate multiple, simultaneous, leaks when other distance-read controllers are integrated into the system

Included Equipment: LD2100 controller, Cat5 crossover cable, leader cable, end-of-line (EOL) terminator


Additional Requirements: Power supply PSWA-DC-24, sensing cable (as needed for application)


Power: 24VDC@ 600mA max., 50/60Hz; requires power supply: PSWA-DC-24 (not included) 24VAC Isolated@ 600mA max., 50/60Hz; requires power supply (not included) 100/120/230-240VAC@ 500mA max., 50/60Hz power supply; included in the optional LD-ENC enclosure


Output: 1 Form C summary relay, 1A @ 24VDC, 0.5A resistive @ 120VAC; configurable for latched or non-latched



  • Leak Detection Cable: Compatible with SeaHawk sensing cable (not included)
  • Cable Input: Requires 15ft (4.6m) leader cable and EOL terminator (included)
  • Maximum Length: 5,000ft (1524m) of conductive fluid sensing cable, or 3,500ft (1,067m) of chemical sensing cable
  • Minimum Length: 35ft (11m)
  • Detection Accuracy: ± 2ft (0.6m) +/- 0.5% of the cable length
  • Detection Repeatability: ± 2ft (0.6m) +/- 0.25% of the cable length
  • Detection Response Time: When used with conductive fluid sensing cable or chemical sensing cable, 5-995sec, software adjustable in 5 second increments; ±2sec.

Communication Ports

  • Ethernet: 10/100BaseT, full/half duplex RJ45 connector; 500VAC RMS isolation
  • EIA-232: DB9 female connector; 9600 baud; 8 data bits, no parity, 1 stop bit
  • EIA-485: 9600, 19200, 38400, or 56700 baud (selectable); Parity: none, even or odd, 8 data bits, 1 stop bit


  • TCP/IP, HTML, TFTP: IPv4.0; webpages comply with Rehabilitation Act of 1973, sections 504 and 508, US Dept of Education (website accessibility for computer users with disabilities)
  • SNMP: V1: V2C MIB-2 compliant; NMS Manageable with Get, Set, Traps: V3 optional
  • SMTP (Email): Supports Client Authentication (plain and login); compatible with ESMTP Servers
  • Modbus (EIA-485): Slave; RTU mode; Supports function codes 03, 04, 06 and 16 Master: RTU mode for integration with RLE’s LD5200, LD2100, and LD1500 products; Johnson N2
  • Modbus TCP/IP UDP/IP: Modbus Slave; TCP/IP transmission protocol Modbus Master; TCP/IP transmission protocol for integration with RLE’s LD2100 and LD1500 products
  • BACnet/IP: ASHRAE STD 135-2004 Annex J
  • BACnet MS/TP: EIA-485
  • BACnet Alarms: Automatically reports to a single destination
  • Terminal Emulation (EIA-232): VT100 compatible

Alarm Notification

  • Visible Alarm: Green, alphanumeric, dot matrix LED display; bi-color status LED
  • Audible Alarm: 70dBA @ 2ft (0.6m); re-sound configurable (disabled, 0-24 hours)
  • Email (Ethernet): 4 email recipients; email sent on Alarm and Return to Normal; each alarm notifies all email recipients
  • SNMP Traps (Ethernet): 4 Community Strings

Logging Capabilities

  • Event Log: Last 500 events
  • Trend Log: Cable current level once daily for the last 288 days

Login Security

  • Web Browser Access (Ethernet): Web password Read Only; 1 Web password Read/Write
  • Terminal Emulation Access: None

Front Panel Interface

  • Display: Green alphanumeric dot matrix display
  • Push Buttons: Test/Reset: 1
  • LED Indicators: Power/Status: 1 bi-color (Power On: green; Alarm: red)

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 185°F (-20° to 85°C)


Dimensions & Weight: 8″W x 4.25″H x 1.25″D (203mmW x 108mmH x 32mmD); 1.5 lbs. (680g)


Mounting: Panel mount Type 1 enclosure


Certifications: CE; ETL listed: conforms to UL 61010-1, EN 61010, CSA C22.2 No. 61010-1, IEC 61326-1:2005; RoHS compliant