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Gas Detectors

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    Manufacturer: Riken Keiki

    Intelligent Gas Detector


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    Create a secure workplace with a comprehensive system

    The SD-1 series is a compact lightweight Intelligent Gas Detector ideal for deployment in refineries and petrochemical plants. The series includes an extensive lineup of models for detecting combustible gases, toxic gases (hydrogen sulfide/carbon monoxide), and oxygen. These devices also offer various functions and features, including HART communication and SIL2 certification. The rugged chassis and range of accessories makes this series ideal for the harshest environments. Connecting this product to indicator/alarm units at local safety points and upstream systems in centralized monitoring rooms or metering rooms helps establish comprehensive disaster prevention systems.

    Main Features

    • Explosion-proof in hydrogen/acetylene environments
      Flame-proof enclosures enable use as an explosion-proof product in hydrogen/acetylene environments.
    • Waterproof/Dust-proof
      Protection rating equivalent to IP65. Suitable for use in harsh environments.
    • Compatible with HART communications
      The product sends digital signals across general analog 4 - 20 mA output lines to allow data exchange over a broad range.
    • Equipped with self-diagnostic function
      The device performs self-diagnostics after power supply starts.
      In the event of an error, instead of displaying the gas concentration, the product will display a fault description (error code) pointing to a potential cause of the problem.
    • Supports gas detection by aspiration
      Connecting the SD-1 Series suction cap (with gas flow inlet/outlet) to the product sensor allows gas detection by aspiration.
      * Use for gas detection by aspiration requires a suction pump and aspirator unit (available separately), in addition to a power supply.


    • Production process: Electrolyte filing
    • Installation point: Room inside
    • Purpose: Oxygen deficiency prevention
    • Detector: model SD-1OX (ATEX・IECEx)
    • Main measuring gases: O2
    • Measuring range: 0-25vol% (Oxygen deficiency prevention Type)
    • Advantages:
      • With concentration display function
      • ATEX/IECEx
    • Benefits: Increase safety in the factory by preventing oxygen deficiency.
    • With a self-diagnostic function that displays error codes and notifies the user in the event of a malfunction.