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Infrared Gas Detector DA-500

Infrared Gas Sensor DA-500: Advanced Gas Detection Technology

Introducing the DA-500, your ultimate solution for detecting a wide range of combustible and toxic gases in industrial settings. Prevent accidents proactively with DA-500's digital signal conversion to a 4-20mA standard current output. It seamlessly integrates with PLCs, DDCs, and recorders to create a comprehensive gas monitoring system. Moreover, DA-500 features RS-485 communication and alarm relay contacts, offering long-range signal transmission of up to 2500m via DC 4-20mA standard output and 1000m through RS-485. Don't compromise on safety; choose DA-500 for reliable gas detection.

Key Features:

  1. Advanced Digital Processing: Equipped with a built-in microprocessor, this gas detector boasts intelligent functions for effortless gas monitoring.
  2. Self-Diagnostic Capability: It automatically diagnoses sensor signals, promptly sending a 2mA error signal in case of malfunctions.
  3. Convenient Auto-Calibration: Calibration becomes hassle-free as you can perform it without opening the cover. Simply touch the cover window with a magnetic bar, making it ideal for use in explosive environments.
  4. Clear LCD Display: Real-time gas density is displayed on the LCD, complemented by a convenient backlight for easy reading in low-light conditions.
  5. User Programmable: Tailor your gas detection experience by programming calibration density and detection range to suit your specific needs.
  6. High-Resolution A/D Converter: The built-in high-resolution analog-to-digital converter ensures accurate output signals.
  7. Versatile Output Options: Choose from various output signals, including DC 4-20mA, 2-step relay contacts, and optional RS-485, for seamless integration with a wide range of devices and equipment.
  8. Long-Distance Transmission: Enjoy stable signal transmission over extended distances, with a maximum range of 2.5km for 4-20mA output and 1.2km for RS-485.
  9. Alarm Functionality: Benefit from SPST 2-step relay contacts (AL1/AL2) for reliable alarm notifications.

Technical Properties:

  • Detection Principle: NDIR (Nondispersive Infrared)
  • Gas Sampling: Diffusion Type
  • Target Gases: Combustible Gas, Toxic Gas
  • Measurement Range: %LEL, PPM, %vol
  • Response Time: Within 30 seconds (90% of full scale)
  • Accuracy: ≤ ±2% of Full Scale
  • Sensor Displacement: Zero - ≤ ±1%LEL every 6 months, Span - ≤ ±1%LEL every 6 months
  • User Programmable: Calibration Density, Detection Range
  • Input Power: DC 20-30V
  • Output Power: 4-20mA (Full Scale) with 2.5km Transmission Range
  • Operating Temperature & Humidity: -30°C to 60°C, 5-95% RH (Non-Condensing)
  • Signal Cable: CVVS & CVVSB 1.5 sq x 3 Wire (Shield Type)
  • Wire Conduit: 1/2” or 3/4” PF, NPT
  • Installation Type: Wall or Pipe Station
  • Exterior Material: Cast Aluminum Alloy
  • Explosion-Proof: Ex d IIC T5 (Certified by Korea Gas Safety Corporation)
  • Output: 2-Step Relay Contact (High/Low)
  • Communication Output: RS-485 Communication Output (Option)