IR Gas Analyzer DA-50

Infrared Gas Analysis Device DA-50 | Industrial Gas Detector

The DA-50 is a cutting-edge gas detection system designed to identify a wide range of combustible and toxic gases that may escape from industrial facilities, catering to gas producers, users, reservoirs, by-producers, and various other stakeholders. Its primary objective is to proactively avert potential accidents.

The DA-50 excels at converting digital signals into a standard 4-20㎃ current output, facilitating seamless transmission to a diverse array of external devices, including PLCs, DDCs, recorders, and more. Leveraging these versatile capabilities, it becomes effortlessly feasible to establish an extensive and comprehensive gas monitoring system.

Notably, the DA-50 goes beyond basic functionality. It offers RS-485 communication signals and gas leakage alarm notifications via relay contact outputs. Additionally, it boasts a DC 4-20mA standard output, which allows for signal transmission over distances of up to 2500 meters from the sensor to the receiver. The RS-485 communication signal extends this range even further, enabling signal transmission over distances of up to 1000 meters. This comprehensive system ensures that potential gas hazards are promptly detected and communicated, enhancing safety and operational efficiency.


  • Advanced Digital Processing: Our built-in microprocessor brings artificial intelligence to gas detection, ensuring a more convenient, precise, and efficient monitoring environment.
  • Corrosion-Resistant Polycarbonate Housing: Crafted from corrosion-proof material with a waterproof design, our polycarbonate housing excels at detecting corrosive gases.
  • Intelligent Self-Diagnosis: The digital processor automatically analyzes sensor signals and promptly triggers a 2mA error signal in case of sensor malfunctions.
  • Backlit LCD Display: Real-time gas density data is presented on an LCD screen with a backlight, facilitating easy reading in low-light conditions.
  • Customizable User Menu: Tailor your calibration density and detection range with our user-programmable menu, giving you control over operational settings.
  • Versatile Signal Outputs: Multiple output signals, including DC 4-20mA, 2-step relay contacts, and optional RS-485, enable seamless integration with various devices and equipment.
  • Long-Range 4-20mA Transmitter: Our 4-20mA output ensures stable signal transmission, even over extended distances of up to 2.5km.
  • Reliable RS-485 Communication: Utilize RS-485 for stable long-distance signal communication, reaching a maximum of 1.2km.
  • Alarm Notifications: Stay informed with SPST 2-step relay contacts (AL1/AL2) for reliable alarm outputs.

Technical Properties:

  • Detection Principle: NDIR (Nondispersive Infrared)
  • Gas Sampling: Diffusion
  • Target Gas: Refer to the list
  • Measurement Range: %LEL, PPM, %vol
  • Response Time: Within 30 seconds, 90% of Full Scale
  • Accuracy: ≤±2% of Full Scale
  • Sensor Calibration: Calibration with a switch
  • Sensor Parallax: Zero - ≤±1%LEL/6 Months, Span - ≤±1%LEL/6 Months
  • User Programmable: Calibration Density, Detection Range
  • Input Power: DC 20V~30V (24V DC Normal) / 100mA (Max.)
  • Output Power: 4~20mA/Full Scale - 2.5km Transmission
  • Communication: RS-485 - 1.2km Transmission
  • Operating Temperature and Humidity: -20°C~50°C, 5%~90% RH (Non-Condensing)
  • Signal Wire: CVVS & CVVSB 1.5sq x 3 Wire - Shield Type
  • Alarm Release: Manual or Automatic
  • Mounting: Wall or Pipe Station
  • Housing: Polycarbonate
  • Alarm Output: 2-Step Relay Contacts (AL1/AL2)