Overview
Consilium Salwico ST400 HC Gas Detector for Marine Hydrocarbon Gas Detection Systems
The Consilium Salwico ST400 HC Gas Detector is a fixed hydrocarbon gas detector designed for continuous monitoring of flammable hydrocarbon gases in marine and offshore environments. It provides early detection of combustible gas leaks, helping protect personnel, machinery, cargo areas, and critical onboard equipment from fire and explosion hazards. The detector delivers a standard 4–20 mA analogue output, features a robust marine-grade enclosure, and integrates with Consilium Salwico GS3000, GS5000, and SW2020 gas detection systems. Its "one-man calibration" design simplifies maintenance while ensuring dependable long-term operation.
At Ship Care Service, we supply genuine Consilium Salwico ST400 HC Gas Detectors, replacement sensors, calibration accessories, spare parts, and technical support for commercial ships, offshore platforms, FPSOs, and marine operators worldwide.
What is the Consilium Salwico ST400 HC Gas Detector?
The Salwico ST400 HC is a fixed combustible gas detector that continuously monitors the atmosphere for hydrocarbon gases, typically measuring gas concentration as a percentage of the Lower Explosive Limit (LEL).
The detector continuously samples ambient air and converts detected hydrocarbon concentration into a 4–20 mA analogue signal, which is transmitted to the connected gas detection control panel. When gas concentration exceeds preset alarm levels, the control system activates audible and visual alarms to warn personnel of potentially explosive conditions. Hydrocarbon detection versions are commonly available with measuring ranges up to 0–100% LEL, depending on the sensing technology and system configuration.
Why is a Hydrocarbon Gas Detector Important?
Hydrocarbon gas leaks can create highly flammable or explosive atmospheres if left undetected.
The Salwico ST400 HC helps operators:
Detect combustible gas leaks at an early stage
Protect personnel from explosion hazards
Monitor hazardous areas continuously
Improve emergency response
Reduce fire and explosion risks
Support safe cargo and fuel operations
Enhance overall onboard safety
How the Consilium Salwico ST400 HC Gas Detector Works
The ST400 continuously monitors ambient air for combustible hydrocarbon gases.
Step 1 – Gas Exposure
Ambient air enters the detector through the sensing head.
Step 2 – Gas Detection
The sensing element continuously measures hydrocarbon gas concentration and generates a proportional electrical signal.
Step 3 – Signal Processing
The transmitter electronics convert the measured gas concentration into a standard 4–20 mA analogue output, allowing continuous communication with the gas detection control system.
Step 4 – Alarm Activation
When hydrocarbon concentration exceeds configured alarm thresholds, the connected gas detection controller activates:
Key Features
Continuous Hydrocarbon Monitoring
Provides continuous monitoring of combustible hydrocarbon gases for improved vessel safety.
Reliable Gas Detection Technology
Depending on the configuration, the detector uses hydrocarbon sensing technology designed for stable and accurate combustible gas measurement.
Standard 4–20 mA Output
Provides a standard analogue output for easy integration with marine gas detection systems.
One-Man Calibration
The detector supports direct field calibration at the detector head, allowing routine maintenance to be completed quickly by a single technician.
Marine-Grade Construction
Designed with corrosion-resistant materials suitable for harsh marine and offshore operating environments.
Compatible with Salwico Gas Detection Systems
The ST400 HC integrates with:
Typical Applications
The Consilium Salwico ST400 HC Gas Detector is commonly installed on:
Oil Tankers
Chemical Tankers
LNG Carriers
LPG Carriers
Offshore Platforms
FPSOs
Drill Ships
Offshore Support Vessels
Engine Rooms
Pump Rooms
Cargo Pump Areas
Fuel Handling Areas
Industries We Serve
The ST400 HC detector is widely used across:
Marine Shipping
Offshore Oil & Gas
Shipbuilding
Offshore Energy
Petrochemical Industry
Marine Safety
Port Operations
Industrial Gas Detection
Who Uses the Consilium Salwico ST400 HC Gas Detector?
Typical users include:
Chief Engineers
Electrical Technical Officers (ETO)
Marine Engineers
Safety Officers
Cargo Officers
Technical Superintendents
Shipowners
Ship Management Companies
Offshore Maintenance Engineers
Why Choose the Consilium Salwico ST400 HC Gas Detector?
Marine operators choose the Consilium Salwico ST400 HC Gas Detector because it provides:
Continuous hydrocarbon gas monitoring
Reliable combustible gas detection
Accurate LEL measurement
One-man calibration
Standard 4–20 mA communication
Marine-grade durability
Easy integration with Consilium gas detection systems
Proven performance in marine and offshore applications.
Technical Overview
The Consilium Salwico ST400 HC Gas Detector is a fixed combustible gas detector engineered for continuous monitoring of hydrocarbon gases in marine and offshore environments. It is designed to provide early warning of flammable gas leaks in hazardous areas such as cargo pump rooms, machinery spaces, fuel handling systems, compressor rooms, offshore process areas, and enclosed spaces.
The detector continuously samples the surrounding atmosphere and measures hydrocarbon gas concentration, typically as a percentage of the Lower Explosive Limit (LEL). The measured value is converted into a standard 4–20 mA analogue output, allowing seamless communication with compatible gas detection control panels such as the Consilium Salwico GS3000, GS5000, and SW2020 systems.
Designed for harsh marine environments, the ST400 HC combines robust construction, reliable gas sensing technology, and straightforward maintenance to help improve onboard safety and reduce the risk of fire or explosion.
Note: Measuring range, sensing technology, alarm set points, and system compatibility may vary depending on the detector version and vessel configuration. Always verify specifications using the detector nameplate and official Consilium documentation.
Main Components
The Consilium Salwico ST400 HC consists of several integrated components that provide reliable hydrocarbon gas detection.
Gas Sensor
The sensing element continuously measures hydrocarbon gas concentration.
Its primary functions include:
Sensor Housing
The housing protects the sensing element from mechanical damage, moisture, and harsh marine conditions while allowing gas to enter the sensor.
Transmitter Electronics
The electronics convert the sensor signal into a standard 4–20 mA analogue output for communication with the gas detection controller.
Calibration Interface
The detector supports field calibration using certified calibration gas, allowing maintenance technicians to verify detector accuracy without removing the unit from service.
Mounting Bracket
The mounting assembly enables secure installation in hazardous locations while providing convenient access for routine maintenance.
Electrical Terminal Block
The terminal block provides connections for:
Power Supply
Signal Output
Ground
System Wiring
Working Principle
The ST400 HC continuously monitors the surrounding atmosphere for combustible hydrocarbon gases.
Step 1 – Air Sampling
Ambient air naturally enters the sensing chamber.
Step 2 – Gas Detection
The sensing element continuously measures the concentration of hydrocarbon gas present in the atmosphere.
Step 3 – Signal Conversion
The detector electronics convert the measured concentration into a proportional 4–20 mA analogue output.
Step 4 – Alarm Processing
The gas detection controller continuously compares the received signal with preset alarm limits.
When hydrocarbon concentration exceeds configured alarm thresholds, the system may activate:
depending on vessel configuration.
Advantages of the Consilium Salwico ST400 HC Gas Detector
Continuous Combustible Gas Monitoring
Provides uninterrupted monitoring of flammable hydrocarbon gases.
Accurate Gas Detection
Reliable sensing technology provides stable combustible gas measurement for improved operational safety.
Fast Leak Detection
Early leak detection helps reduce the risk of:
Fire
Explosion
Equipment damage
Production downtime
One-Man Calibration
The detector supports straightforward field calibration, reducing maintenance time and improving service efficiency.
Standard 4–20 mA Output
Simple integration with existing marine gas detection systems.
Marine-Grade Construction
Designed to withstand:
Salt-laden atmosphere
High humidity
Offshore environments
Continuous vibration
Harsh weather conditions
Routine Maintenance
Routine inspection helps maintain dependable gas detection performance.
Before Operation
Inspect:
Detector housing
Sensor condition
Power supply
Wiring connections
Alarm status
Confirm the detector is operating normally.
Weekly Inspection
Check:
Physical condition
Mounting hardware
Wiring integrity
Indicator status
General cleanliness
Remove dust and contamination if necessary.
Monthly Inspection
Inspect:
Perform functional testing according to vessel maintenance procedures.
Annual Maintenance
Recommended maintenance includes:
All maintenance activities should be documented within the vessel's Planned Maintenance System (PMS).
Common Operational Problems
Although the ST400 HC is designed for reliable marine service, occasional operational issues may occur.
Problem: Sensor Failure
Possible Causes
Sensor ageing
Sensor contamination
End of sensor life
Mechanical damage
Recommended Solution
Inspect the sensing element and replace it if necessary.
Problem: No Output Signal
Possible Causes
Recommended Solution
Verify power supply, inspect wiring, and test the detector electronics.
Problem: False Gas Alarm
Possible Causes
Recommended Solution
Clean the detector, verify installation conditions, and recalibrate using certified calibration gas.
Problem: Communication Failure
Possible Causes
Cable damage
Loose wiring
Controller fault
Signal interruption
Recommended Solution
Inspect field wiring, verify continuity, and confirm communication with the gas detection controller.
Problem: Calibration Failure
Possible Causes
Recommended Solution
Use certified calibration gas, repeat the calibration process, and replace the sensor if calibration cannot be completed successfully.
Calibration Recommendations
Routine calibration is essential for maintaining reliable hydrocarbon gas detection.
Calibration is recommended:
Every 6–12 months (or according to the manufacturer's guidance)
After sensor replacement
Following exposure to high gas concentrations
After major maintenance
During annual safety inspections
As specified in the vessel's Planned Maintenance System
Routine bump testing should also be performed at intervals defined by company safety procedures.
Genuine Spare Parts Available
Ship Care Service supplies genuine replacement parts for the Consilium Salwico ST400 HC Gas Detector, including:
Availability depends on the installed detector configuration.
Buying Guide
Before purchasing a Consilium Salwico ST400 HC or replacement components, consider the following:
Verify System Compatibility
Confirm compatibility with the installed Consilium gas detection system.
Confirm Equipment Identification
Providing the following information helps identify compatible replacement parts:
Choose Genuine Consilium Components
Using genuine replacement parts helps maintain:
Accurate combustible gas detection
Reliable alarm performance
Long sensor life
Full system compatibility
Compliance with marine safety requirements
Work with an Experienced Marine Supplier
Choose a supplier capable of providing:
Why Marine Operators Choose the Consilium Salwico ST400 HC Gas Detector
The Consilium Salwico ST400 HC Gas Detector is trusted because it offers:
Continuous hydrocarbon gas monitoring
Reliable combustible gas detection
Fast response to gas leaks
One-man calibration
Standard 4–20 mA communication
Marine-grade durability
Easy integration with Consilium gas detection systems
Proven performance for marine and offshore applications
1. What is the Consilium Salwico ST400 HC Gas Detector?
The Consilium Salwico ST400 HC Gas Detector is a fixed combustible gas detector designed to continuously monitor hydrocarbon (HC) gases in marine and offshore environments. It helps detect flammable gas leaks at an early stage to improve onboard safety and reduce fire and explosion risks.
2. What gases can the ST400 HC detect?
The ST400 HC is designed to detect combustible hydrocarbon gases, typically measuring gas concentration as a percentage of the Lower Explosive Limit (LEL). It can be used in applications involving methane, propane, butane, and other hydrocarbon vapors, depending on the detector configuration and calibration.
3. How does the ST400 HC Gas Detector work?
The detector continuously samples ambient air using its sensing element. When combustible hydrocarbon gas is present, the sensor measures the concentration and converts it into a 4–20 mA analogue signal, which is transmitted to the connected gas detection controller. If the gas concentration exceeds preset alarm levels, the controller activates alarms and safety functions.
4. Where is the ST400 HC commonly installed?
Typical installation locations include:
Engine Rooms
Cargo Pump Rooms
Fuel Handling Areas
Compressor Rooms
LNG & LPG Equipment Spaces
Offshore Production Modules
FPSOs
Pump Stations
Hazardous Machinery Spaces
5. Which gas detection systems are compatible with the ST400 HC?
The detector is commonly used with:
Compatibility should always be verified before installation.
6. Why is hydrocarbon gas monitoring important onboard ships?
Hydrocarbon gases are highly flammable and may form explosive atmospheres if leaked. Continuous monitoring helps:
Detect leaks early
Prevent fires and explosions
Protect crew members
Improve emergency response
Enhance vessel safety
Reduce operational downtime
7. Does the ST400 HC require calibration?
Yes.
Routine calibration is necessary to maintain measurement accuracy and reliable gas detection performance. Calibration should follow the manufacturer's recommendations and the vessel's Planned Maintenance System (PMS).
8. What is a bump test?
A bump test exposes the detector to a certified test gas to verify that the sensor and alarm system respond correctly. It confirms detector functionality without performing a full calibration.
9. What are the most common operational problems?
Common issues include:
Routine maintenance helps minimize these issues.
10. How often should the sensor be replaced?
Sensor life depends on operating conditions, environmental exposure, maintenance practices, and gas exposure history. Replacement is recommended when the sensor fails calibration, functional testing, or reaches the manufacturer's specified service life.
11. What spare parts are commonly available?
Common spare parts include:
Availability depends on the installed detector model.
12. Can the ST400 HC be installed outdoors?
Yes.
The detector is designed with a rugged marine-grade enclosure suitable for both indoor and outdoor marine environments when installed according to the manufacturer's guidelines.
13. Why should genuine Consilium spare parts be used?
Using genuine parts helps maintain:
Accurate combustible gas detection
Reliable alarm performance
Long sensor service life
Full system compatibility
Compliance with marine safety standards
14. How can I identify the correct replacement detector?
Provide the following information:
This helps ensure the correct detector or spare part is supplied.
15. Who typically uses the Consilium Salwico ST400 HC?
Typical users include:
Chief Engineers
Electrical Technical Officers (ETO)
Marine Engineers
Safety Officers
Cargo Officers
Technical Superintendents
Shipowners
Ship Management Companies
Offshore Maintenance Engineers
Why Buy from Ship Care Service?
At Ship Care Service, we supply genuine Consilium Salwico ST400 HC Gas Detectors, replacement hydrocarbon sensors, calibration accessories, spare parts, and technical support for commercial vessels, offshore platforms, FPSOs, and marine industries worldwide.
Our Supply Includes
Whether you require a complete detector, replacement sensing element, calibration accessories, or technical support, our experienced marine safety team is ready to assist.
Call to Action
Looking for Genuine Consilium Salwico ST400 HC Gas Detectors?
Ship Care Service supplies genuine Consilium Salwico ST400 HC Gas Detectors, replacement hydrocarbon sensors, calibration accessories, spare parts, and technical support for marine gas detection systems worldwide.
Contact our team today to request a quotation, verify product availability, or identify the correct replacement parts for your vessel's combustible gas detection system.
