Riken Keiki RX-8500 Portable Gas Monitor

Riken Keiki RX-8500 Portable Gas Monitor

The Riken Keiki RX-8500 Portable Gas Monitor is a sophisticated instrument engineered for precise gas detection in challenging environments, particularly suited for cargo monitoring on LNG tankers. This cutting-edge device allows for the simultaneous detection and display of combustible gases like methane (CH4) and oxygen (O2), alongside the measurement of carbon dioxide (CO2) density in repairing tanks, ensuring comprehensive monitoring capabilities. Featuring a range of detection methods including Non-Dispersive Infrared, Potentiostatic Electrolysis, and Membrane Type Galvanic Cell, the RX-8500 delivers accurate readings across various gas concentrations. Its sampling methods, including suction and double types, ensure flexibility and efficiency in gas detection operations.

Designed with user convenience in mind, the RX-8500 boasts a rugged construction with explosion-proof and ingress protection ratings, making it suitable for use in hazardous environments. The device is equipped with alarm systems, including gas and fault alarms, with multiple alert indicators such as lamp blinking, buzzer, and detailed display for immediate response to potential hazards. With its long-lasting lithium-ion battery unit providing up to 15 hours of continuous operation, or the option for a dry battery unit for up to 8 hours, the RX-8500 offers reliability and endurance during extended monitoring tasks. Compact and lightweight, it is easily portable for on-the-go usage, with dimensions of approximately 154mm (W) × 81mm (H) × 163mm (D) and weighing just over 1 kilogram. Overall, the Riken Keiki RX-8500 sets a new standard for portable gas monitoring equipment, ensuring safety and accuracy in critical industrial applications, particularly in the maritime LNG sector.


  • Simultaneous detection and display of combustible gas and oxygen
  • Continuous operating time of more than 10 hours
  • Measures residual CO2 density in repairing tanks
  • Sampling methods: suction type/double type
  • Detection principles: Non-Dispersive Infrared Method, Potentiostatic Electrolysis Method, Membrane Type Galvanic Cell Method
  • Detection range for various gases: CH4, O2, CO, CO2
  • Gas alarm and fault alarm capabilities
  • Explosion-proof construction with Intrinsic safety
  • IP67 Ingress protection rating
  • Approved by various standards including ATEX, IECEx, CE marking
  • Power source options: lithium-ion battery unit or dry battery unit
  • Dimensions: approx. 154mm (W) × 81mm (H) × 163mm (D)
  • Weight: approx. 1.1-1.2 kg
  • Operating temperature range: -20 to 50℃
  • Operating humidity range: 0 to 95% RH

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Riken Keiki RX-8500 Portable Gas Monitor