Copeland Emerson MRLDS-550 IR CO2 50,000ppm, IP66

SKU: 809-1022

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MRLDS-550 Industrial Refrigerant Gas Detector

Copeland’s MRLDS-550 (Modular Refrigerant Leak Detection System) continuously monitors indoor or outdoor ambient air for refrigerants, oxygen and toxic and combustible gases. The leak detector is housed in a rugged ABS enclosure.

The MRLDS-550 can easily be integrated into any building management system (BMS) or supervisory controls. The Modbus RTU interface allows the user to program and configure the unit remotely through the supervisory controls. Remote access gives complete control to the user when using Modbus via RS485.

Features and Benefits

  • One or Two Sensor Capability
    • Detects two gases and/or in two locations with one instrument
  • Remote Sensor Capabilities
    • Flexible placement in hard to reach areas
  • Analog and Digital Interface
    • Ease of integration with multiple control devices
  • On-board Relays
    • Connects to local alarm devices for savings cost and installation
  • Magnetic Wand
    • Non-intrusive configuration and calibration
  • Status Indicator and LED Display
    • Provides at-a-glance status overview and comprehensive direct user interface


  • Power Supply: 19.5 to 28.5 VDC or 24 VAC, +/- 20%, 3- or 4-wire
  • Analog Outputs: 4 -20mA, 0-5V, 1-5V, 2–10V
  • Digital Outputs: Modbus RTU via RS 485
  • Display: Red 5-digit, 7-segmented LED and green status LEDs
  • Relay: Three relays, SPDT, user assignable Rating 2A @ 30VDC NO, 0.5A @ 125 VDC, 0.25A @ 250VAC, 30W, resistive load
  • Enclosure: General purpose ABS IP66 with four M20 x 1.5 cable glands
  • Size (WxHxD) Approx: 8.3” x 8.9” x 3.4” 210 x 225 x 85mm
  • Weight Approx.: 2 lbs / 1 kg
  • Approvals: CE, UL / CSA / IEC EN 61010-1
  • Temperature: -40 to 122F / -40 to 50C
  • Humidity: 5 to 90 % RH, non condensing
  • Pressure: 23.6 to 32.5 inch Hg / 800 to 1.100 mbar

Part Number: 809-1022