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This LD1500-M is ideal for areas where sensing cable may not be visible, and is most commonly installed in data centers (under raised floors), museums, libraries, clean rooms, and telecommunication centers.

The LD1500-M Features:

  • Distance-read leak detection controller.
  • Monitors up to 1,500 feet (457 meters) of RLE’s chemical sensing cable.
  • Compatible with SeaHawk chemical sensing cable
  • Includes the leader cable and EOL that are compatible with chemical sensing cable.
  • An easy to use web interface, accessible from any browser or mobile device.
  • Integration via protocol into a larger BMS or RLE LD2100 or LD5200 controller.

Make Sure You Have An Isolated Power Supply!

RLE leak detection controllers, including the LD1500-M, require an isolated power supply. A power supply is not included with the LD1500-M. Purchase an RLE power supply – PSWA-DC-24 or 24V-POE-Kit – or RLE’s LD-ENC.

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

Included Equipment: LD1500 controller, chemical cable leader cable, chemical cable end-of-line (EOL) terminator

Additional Requirements: Isolated RLE power supply, chemical sensing cable (as needed for application)

Power: Requires an isolated power supply.

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


  • Leak Detection Cable: Compatible with SeaHawk chemical sensing cables (not included)
  • Cable Input: Requires 15ft (4.6m) leader cable and EOL terminator (included)
  • Maximum Length: 1,500ft (457m) of chemical sensing cable
  • Minimum Length: 35ft (11 m)
  • 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 sensing cable, 5-995sec; software adjustable in 5 second increments; ±2sec.

Communication Ports

  • EIA-485: 1200, 2400, 9600, 19200, or 38400 baud (selectable); Parity: none, even or odd, 8 data bits, 1 stop bit
  • EIA-232: DB9 female connector; 9600 baud; 8 data bits, no parity, 1 stop bit
  • RJ-45: 10/100BASE-T Ethernet port; 500VAC RMS isolation


  • EIA-485: Modbus RTU, Server; BACnet MS/TP; N2
  • EIA-232: Terminal emulation, VT100 compatible
  • RJ-45: Ethernet, TCP/IP; Modbus TCP/UDP, Server; SNMP V1, V2; NTP, SMTP, DNS; BACnet/IP

Alarm Notification

  • Visual Alarm: Bi-color status LED
  • SNMP Traps/Informs (Ethernet): 2 Community Strings

Logging Capabilities

  • Event Log: Last 10 events

Login Security

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

Front Panel Interface

  • LED Indicators: Power/Status: 1 bi-color (Power On: green; Alarm / Cable Fault / Cable Contamination: 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: 7″W x 3.62″H x 1.25″D (178mmW x 92mmH x 32mmD)

Weight: 1.5 lbs. (680g)

Mounting: Panel mount Type 1 enclosure.  Optional wall mount enclosure available (LD-ENC-NP)

Certifications: CE; ETL listed: conforms to UL 61010-1, EN 61010-1; certified to CSA C22.2 NO. 61010-1; RoHS compliant

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