Overview
Riken Keiki SD-D58 Fixed Gas Detector | Intelligent Diffusion Type Fixed Combustible Gas Detector
The Riken Keiki SD-D58 Fixed Gas Detector is a high-performance diffusion-type fixed combustible gas detector designed for continuous monitoring of combustible gas leaks in hazardous industrial environments. Manufactured by Riken Keiki Co., Ltd., Japan, the SD-D58 combines advanced gas sensing technology, rugged industrial construction, high measurement accuracy, and long-term reliability to provide dependable protection for personnel, equipment, and industrial facilities.
The SD-D58 is specifically engineered to detect combustible gases before they reach dangerous concentrations, helping industries prevent explosions, fires, production shutdowns, and costly equipment damage. It is widely installed in oil & gas facilities, offshore platforms, LNG terminals, petrochemical plants, chemical processing facilities, hydrogen production sites, power plants, marine vessels, industrial manufacturing plants, and utility stations where continuous gas monitoring is essential.
One of the key advantages of the SD-D58 is its use of Riken Keiki's advanced ceramic-type catalytic combustion sensor, designed to deliver excellent sensitivity, rapid response, long operational life, and superior measurement stability. Compared with conventional combustible gas detectors, the ceramic sensor provides improved resistance to environmental conditions while maintaining accurate gas concentration measurement over extended periods.
The detector continuously samples surrounding air using the natural diffusion method, eliminating the need for pumps or moving components. This simple detection principle improves long-term reliability while reducing maintenance requirements and operating costs. The SD-D58 continuously measures combustible gas concentrations and transmits real-time data to industrial control systems through a standard 4–20 mA analog output, enabling immediate alarm activation when preset gas thresholds are exceeded.
Designed for easy integration into industrial automation systems, the SD-D58 is compatible with PLC systems, DCS platforms, SCADA systems, Fire & Gas Systems, Building Management Systems (BMS), and Emergency Shutdown Systems (ESD). This allows plant operators to monitor gas concentrations centrally and respond quickly to hazardous situations before they become critical.
The detector features a compact yet durable industrial housing engineered for continuous operation in harsh environments. Its weather-resistant construction protects the internal electronics and sensor against dust, moisture, vibration, and corrosive industrial atmospheres, making it suitable for both indoor and outdoor installations.
The SD-D58 is particularly valuable for facilities handling methane, hydrogen, propane, butane, LPG, LNG, and other combustible hydrocarbon gases. By continuously monitoring gas concentrations in the lower explosive limit (LEL) range, it provides early warning of gas leaks, allowing corrective action before combustible gas reaches explosive levels.
Known worldwide for precision engineering and exceptional reliability, Riken Keiki has built a strong reputation in industrial gas detection for over eight decades. The SD-D58 reflects this expertise by offering reliable performance, simplified installation, reduced maintenance, and long service life, making it a cost-effective solution for industrial combustible gas monitoring.
Whether protecting offshore drilling platforms, marine engine rooms, oil refineries, LNG storage terminals, chemical plants, hydrogen production facilities, or industrial processing plants, the Riken Keiki SD-D58 Fixed Gas Detector delivers accurate, continuous, and dependable combustible gas detection for demanding industrial safety applications.
Key Features of Riken Keiki SD-D58 Fixed Gas Detector
The Riken Keiki SD-D58 combines advanced combustible gas sensing technology with robust industrial construction for reliable continuous gas monitoring.
Advanced Ceramic Catalytic Sensor
The SD-D58 utilizes Riken Keiki's ceramic-type catalytic combustion sensor for accurate combustible gas detection.
Benefits
High measurement accuracy
Fast response time
Excellent long-term stability
High durability
Long sensor life
Low maintenance requirements
Continuous Diffusion-Type Monitoring
The detector continuously monitors surrounding air using the natural diffusion method.
Advantages
Reliable Combustible Gas Detection
The SD-D58 is designed for accurate monitoring of various combustible gases.
Typical detectable gases include:
Methane (CH₄)
Hydrogen (H₂)
Propane
Butane
LPG
LNG Vapours
Natural Gas
Hydrocarbon Gases
High Measurement Stability
The detector provides stable long-term operation under demanding industrial conditions.
Features include:
Industrial Communication
The SD-D58 integrates easily with industrial control systems.
Standard output includes:
Compatible with:
Compact Industrial Design
The detector features a compact enclosure suitable for installation in confined industrial locations.
Benefits include:
Easy installation
Space-saving design
Rugged construction
Long operational life
Weather-Resistant Construction
Designed for industrial environments, the SD-D58 provides reliable performance in harsh operating conditions.
Features include:
Weather-resistant housing
Dust resistance
Moisture resistance
Corrosion-resistant construction
Suitable for indoor and outdoor installation
Benefits of Riken Keiki SD-D58 Fixed Gas Detector
Key Benefits
Advanced ceramic catalytic sensor
Continuous diffusion monitoring
Accurate combustible gas detection
Fast response time
High measurement stability
Long sensor life
Low maintenance
Compact industrial design
Easy installation
4–20 mA analog output
Easy PLC & SCADA integration
Reliable Japanese engineering
Long-term industrial performance
Why Choose Riken Keiki SD-D58?
The Riken Keiki SD-D58 Fixed Gas Detector offers dependable and accurate combustible gas monitoring using proven ceramic catalytic sensing technology. Its diffusion-type operation, rugged industrial design, and reliable 4–20 mA communication make it an excellent solution for facilities requiring continuous gas leak detection with minimal maintenance.
Designed for harsh industrial environments, the SD-D58 combines long-term reliability, high sensitivity, and simple installation, helping improve workplace safety while reducing maintenance costs. Its proven performance makes it an ideal choice for marine, offshore, oil & gas, LNG, petrochemical, hydrogen, and industrial applications.
Working Principle
The Riken Keiki SD-D58 continuously monitors ambient air using the natural diffusion method. Combustible gas entering the detector reaches the ceramic catalytic sensor, where oxidation of the gas produces a measurable change in sensor characteristics proportional to the gas concentration.
The detector converts this measurement into a standard 4–20 mA analog output, transmitting real-time gas concentration data to connected PLC, DCS, SCADA, or Fire & Gas systems. When combustible gas concentrations exceed preset alarm levels, the connected safety system can activate alarms or initiate emergency shutdown procedures.
Typical Applications
The Riken Keiki SD-D58 is widely used in:
Marine & Shipping
Engine Rooms
Pump Rooms
Cargo Areas
LNG Carriers
Oil Tankers
Offshore Oil & Gas
Offshore Platforms
FPSOs
Drilling Rigs
Compressor Stations
Production Modules
Petrochemical Industry
Oil Refineries
Chemical Plants
Tank Farms
Solvent Storage Areas
Hydrogen Industry
Hydrogen Production Plants
Hydrogen Storage Facilities
Hydrogen Refuelling Stations
Industrial Applications
Detection Technology
The Riken Keiki SD-D58 utilizes a ceramic catalytic combustion sensor, specifically designed for continuous monitoring of combustible gases in hazardous industrial environments.
Ceramic Catalytic Combustion Sensor
The ceramic catalytic sensor detects combustible gases by oxidizing the target gas on a heated catalyst element. The resulting temperature change is converted into an electrical signal proportional to the gas concentration.
Advantages
Compared with conventional catalytic sensors, the ceramic-type sensor provides enhanced durability and improved long-term performance in demanding industrial conditions.
Gas Types Detected
The SD-D58 is designed for continuous monitoring of combustible gases commonly found in industrial environments.
Combustible Gases
Measuring Ranges
Typical measuring ranges include:
Combustible Gas
The detector continuously measures combustible gas concentration and provides early warning before gas levels reach explosive limits.
Note: Available measuring ranges may vary depending on the specific gas calibration and application.
Communication & Outputs
The SD-D58 is designed for seamless integration with industrial safety and automation systems.
Standard Output
This enables real-time transmission of gas concentration values to plant control systems.
Compatible Systems
The detector integrates with:
Sensor Features
The advanced ceramic catalytic sensor provides reliable performance for continuous industrial gas monitoring.
Key Sensor Features
High measurement accuracy
Fast gas detection
Stable long-term operation
Excellent repeatability
Long sensor lifespan
Minimal drift
Reduced maintenance requirements
Installation Features
The SD-D58 is designed for easy installation in hazardous industrial environments.
Installation Options
Wall Mount Installation
Pole Mount Installation
Outdoor Installation
Indoor Installation
Installation Benefits
Industries Served
The Riken Keiki SD-D58 is widely used across numerous industrial sectors.
Marine Industry
Cargo Ships
Oil Tankers
LNG Carriers
Engine Rooms
Pump Rooms
Offshore Oil & Gas
Offshore Platforms
FPSOs
Drilling Rigs
Compressor Stations
Production Facilities
Petrochemical Industry
Hydrogen Industry
Hydrogen Production Plants
Hydrogen Storage Facilities
Hydrogen Refuelling Stations
LNG & LPG Industry
LNG Terminals
LPG Storage Facilities
Gas Processing Plants
Industrial Applications
Certifications & Compliance
The Riken Keiki SD-D58 is designed to meet international industrial safety standards.
Typical approvals include:
These certifications ensure suitability for installation in hazardous industrial locations.
