ACI LD1000 Single Zone Leak Detection Controller


  • Monitor up to 1,000 feet of sensing cable and spot detectors.
  • Quickly returns to normal status after the sensing cable is wiped dry.
  • Durable NEMA 1 enclosure
  • Adjustable leak alarm sensitivity
  • Two relay outputs, configurable as supervised or non-supervised and as leak & fault or summary alarms

Automation Components, Inc. (ACI) creates, manufactures, and distributes building automation sensors for the heating, ventilation, and air conditioning (HVAC) Industry. Dpstar is ACI Authorised Distributor in Malaysia. Our product lines include Temperature Sensors, Relative Humidity Sensors, Current Sensors, Pressure Sensors, Gas Sensors, and Wireless Sensors.

ACI’s most rugged single-zone controller, the LD1000 provides reliable leak detection, preventing facility and equipment damage, costly business outages, and downtime.

What Sets ACI’s LD1000 Apart?

  • Zone leak detection system alarms when water comes into contact with the attached sensing cable or spot detector. It is the right fit for spaces where sensing cables and spot detectors are visible so leaks can easily be located.
  • A supervised system, the controller continuously monitors the cable for leaks, breaks, and disconnects and sends an alarm notification when one is detected.
  • Local alarm annunciation and Modbus integration. Onboard audible and visible alarms and a Modbus output allow the LD1000 to notify users of leaks and faults in real-time and deliver that information directly to a LD5200, LD2100, or a larger BMS system.


  • Facilities where the sensing cable or spot detector is exposed or leaks can easily be located.
  • Areas that require a more durable, robust, industrial single zone leak detection controller.


Power Requires an isolated power supply for DC opera on.
24VDC (±10%) Isolated @ 300mA max.; requires ACI power supply A/PS24-24V-S.
24VAC (±10%) @ 300mA max.; requires ACI power supply LE117 or LE120.
Included Accessories Leader cable and EOL terminator.
Sensing Cable Compa ble with all ACI sensing cables and the SD-Z and SD-Z1 spot detectors.
Cable Input Requires ACI LC-Kit: 15 (4.57m) leader cable and EOL terminator (included).
Maximum Length Up to 1,000 (305m) of sensing cable.
Detection Response Time Configurable for 10sec or 2min, ±10%, when used with conduc ve 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
Communica on Port EIA-485 9600 or 19,200 baud; Parity none; 8 data bits, 1 stop bit
Protocols Modbus (EIA-485) Slave; RTU Mode; Supports func on codes 03, 04, and 06
Alarm Notifiction Audible Alarm 85DBA @ 2 (0.6m); Selectable
Front Panel Interface
LED Indicators
Push Bu ons
Power: 1 green (on/off); Cable Fault: 1 amber; Leak Detected: 1 red
1: Quiet, Reset, Test
Operating Environment
Al tude
32° to 122°F (0° to 50°C) 5%
to 95% RH, non-condensing
15,000 (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 oz (765g)
Certifications CE; ETL listed: conforms to UL 61010-1, EN 61010-1; RoHS compliant


ACI LD1000 Leak Detection Controller_DpstarGroup