Eranntex MS104K-S2 LEL + O2 Combustible Gas Detector Malaysia
Eranntex MS104K-S2 LEL + O2 Combustible Gas Detector Malaysia
When working around flammable gases, vapours or potentially oxygen-deficient atmospheres, monitoring both combustible gas concentration and oxygen can be an important part of industrial safety.
The Eranntex MS104K-S2 Portable 2-in-1 Gas Detector can be configured for selected dual-gas applications.
An LEL + O₂ configuration is particularly relevant when workers need portable monitoring for both combustible gas risk and oxygen condition.
For industrial users in Malaysia, this configuration can be considered for oil & gas, petrochemical, tank maintenance, utilities and selected industrial inspection applications.
What Does LEL Mean on a Gas Detector?
LEL means Lower Explosive Limit.
A combustible gas detector does not simply tell the user whether gas is present.
It can indicate the concentration relative to the gas's lower explosive limit, typically expressed as:
%LEL
The lower explosive limit represents the minimum concentration at which a combustible gas or vapour can form an ignitable mixture under defined conditions.
This makes LEL monitoring important wherever flammable gases or vapours may accumulate.
Why Monitor LEL and O₂ Together?
Combustible gas is only one atmospheric concern.
A work area may also have an abnormal oxygen concentration.
An LEL + O₂ gas detector allows the worker to monitor both parameters using one portable instrument.
This is useful because the two measurements answer different safety questions:
LEL → Is there a potentially dangerous concentration of combustible gas or vapour?
O₂ → Is the oxygen concentration within an acceptable range for the work procedure?
Monitoring one does not replace monitoring the other.
Where Can LEL + O₂ Monitoring Be Relevant?
Potential applications include:
Oil & gas facilities
Petrochemical plants
Chemical processing
Tank maintenance
Storage areas
Pipeline maintenance
Fuel-related facilities
Industrial plants
Utility operations
Process areas
Maintenance shutdowns
Selected confined spaces
The actual gases and atmospheric hazards must always be established through a proper risk assessment.
Combustible Gas Detection in Industrial Work
Flammable gas or vapour can arise from many industrial sources.
Depending on the facility, examples may include:
Natural gas
LPG
Methane
Hydrocarbon vapours
Solvents
Fuels
Process gases
The detector and sensor must be suitable for the gas being monitored.
This is important because not every combustible gas produces exactly the same sensor response.
Users should identify the expected target gas before selecting and configuring the detector.
Why Oxygen Matters
Normal outdoor air contains approximately 20.9% oxygen by volume.
In industrial environments, oxygen concentration can change because of displacement, consumption, chemical reactions or other processes.
For example, another gas entering an enclosed area may displace oxygen.
Therefore, detecting combustible gas alone does not automatically establish that the atmosphere is suitable for workers.
An appropriately configured MS104K-S2 allows both parameters to be observed continuously.
LEL + O₂ for Tank Maintenance
Tank work is one area where atmospheric conditions deserve particular attention.
Depending on the tank's previous contents, cleaning method, ventilation and process conditions, workers may face several potential atmospheric hazards.
These can include:
oxygen deficiency, combustible vapours and toxic gases.
An LEL + O₂ detector may be appropriate when these are the specific two parameters required.
However, if toxic gases such as H₂S or CO are also credible hazards, a two-gas detector may not provide sufficient coverage.
Is LEL + O₂ Enough for Confined Space?
Not necessarily.
This is one of the most important points when selecting a gas detector.
Confined-space atmospheric testing may require monitoring of:
Oxygen
Combustible gas
Hydrogen sulphide
Carbon monoxide
Other application-specific toxic gases
If the applicable safety procedure requires a conventional 4-gas test, an LEL + O₂ detector should not be used as a substitute.
The MS104K-S2 makes sense when the required monitoring parameters genuinely match its selected one- or two-gas configuration.
Diffusion-Type Personal Gas Detection
The MS104K-S2 uses diffusion sampling.
The surrounding atmosphere naturally reaches the detector sensors.
This makes diffusion instruments convenient for continuous personal monitoring while workers move around a site.
A worker can wear the detector while performing inspection or maintenance activities and receive an alarm if monitored concentrations reach configured alarm levels.
What About Testing a Tank Before Entry?
This is different from personal monitoring.
Suppose a worker is standing outside a tank and needs to know the gas concentration several metres inside.
A diffusion detector positioned outside cannot automatically tell the user what the atmosphere is like at the remote sampling point.
For this type of application, a pump-type gas detector with an appropriate sampling hose or probe may be required.
A simple rule is:
Monitoring around the worker → diffusion may be suitable.
Drawing a sample from another location → consider a pump detector.
Always follow the site's approved atmospheric testing procedure.
MS104K-S2 LEL + O₂ vs 4-Gas Detector
Which should you buy?
Choose LEL + O₂ when:
The risk assessment specifically identifies combustible gas and oxygen as the required monitoring parameters.
Choose a 4-gas detector when:
The work requires monitoring such as:
LEL + O₂ + CO + H₂S
Choose a different gas configuration when:
The actual hazard involves another specific toxic gas.
The goal is not to purchase the maximum number of sensors.
The goal is to monitor every relevant hazard with the correct instrument.
LEL Detector vs Natural Gas Leak Detector
These terms are sometimes confused.
A personal LEL detector is primarily intended to monitor combustible-gas concentration for worker atmospheric safety.
A dedicated gas leak detector may instead be designed to locate the source of a leak around:
Pipes
Valves
Fittings
Joints
Regulators
The two instruments can therefore serve different purposes.
If your objective is to find exactly where a small gas leak is coming from, tell us before ordering so the appropriate instrument type can be considered.
Digital Sensor Technology
The MS104K-S2 incorporates digital sensor technology.
For companies managing multiple portable gas detectors, structured sensor management can help support maintenance and lifecycle control.
Gas detectors should be included in an organised safety programme involving appropriate:
inspection, functional checks, calibration, maintenance and sensor replacement.
A detector that powers on is not automatically proof that its sensors are responding correctly.
Data Logging
The MS104K-S2 supports extensive data storage, with capacity exceeding one million records.
Data logging can support industrial safety activities such as:
Gas exposure review
EHS documentation
Incident investigation
Monitoring history
Internal audits
Safety records
Maintenance analysis
This can be particularly useful for companies moving from basic personal alarms toward more structured gas-safety management.
Wireless Connectivity
Depending on configuration, the MS104K-S2 platform can support communication options including:
4G / Wi-Fi / LoRa / Bluetooth
For larger industrial sites, connectivity can support the development of a more integrated gas-monitoring and connected-worker environment.
This is particularly relevant where safety teams want greater visibility than standalone local alarms alone can provide.
Fall Detection and SOS
The MS104K-S2 also incorporates worker-oriented functions such as fall detection and SOS emergency capability.
These features may add value for:
Lone workers
Tank maintenance personnel
Utility workers
Plant technicians
Remote inspection personnel
Oil & gas maintenance teams
This allows the detector to contribute to a broader worker-safety strategy beyond gas concentration measurement alone.
Who Should Consider MS104K-S2 LEL + O₂?
This configuration may be worth evaluating for:
Oil & Gas Contractors
working around potential combustible atmospheres.
Petrochemical Maintenance Teams
requiring portable atmospheric monitoring.
Tank Maintenance Contractors
where combustible gas and oxygen conditions are identified hazards.
Factory Maintenance Departments
working in process or fuel-related areas.
Utility Teams
performing inspection and maintenance in potentially hazardous environments.
EHS / Safety Departments
looking for a focused two-gas personal detector.
Before Ordering an LEL + O₂ Detector
Confirm the following first:
What combustible gas or vapour is expected?
Is oxygen monitoring required?
What measurement ranges are needed?
What alarm levels are required?
Are CO or H₂S also possible hazards?
Is the detector for personal monitoring or remote sampling?
Is data logging required?
Is wireless connectivity required?
What certification does the site require?
This information is much more useful than simply asking for a “2-gas detector”.
Frequently Asked Questions
What does %LEL mean?
%LEL indicates combustible-gas concentration relative to the Lower Explosive Limit for the relevant gas and detector calibration.
Can MS104K-S2 detect combustible gas and oxygen together?
The MS104K-S2 supports selected one- and two-gas configurations. The required LEL + O₂ configuration and sensor specifications should be confirmed before ordering.
Can I use it for methane?
Combustible-gas applications depend on the installed sensor, calibration and target gas. Tell us the expected gas so that sensor suitability can be checked.
Can it detect LPG?
Do not assume that every combustible-gas application has identical sensor response. The expected gas and application should be confirmed before detector selection.
Can I use MS104K-S2 to find a gas leak?
A personal LEL detector and a dedicated gas leak detector serve different purposes. If your main objective is pinpointing leaks around pipes, valves or fittings, a dedicated leak detector may be more suitable.
Is LEL + O₂ enough for confined-space entry?
Only if those are the required atmospheric parameters under the applicable risk assessment and work procedure. If CO, H₂S or other gases must also be monitored, select an instrument capable of measuring them.
Should I choose diffusion or pump type?
Diffusion is well suited to personal monitoring around the worker. Pump sampling is often preferred when gas needs to be drawn from a remote location, such as pre-entry testing inside a tank.
Eranntex MS104K-S2 Combustible Gas Detector Supplier Malaysia
MTM Precision supplies industrial testing, measurement and safety instrumentation to customers throughout Malaysia.
For the Eranntex MS104K-S2, customers can discuss the required gases, sensor configuration, measuring range and intended application before ordering.
We support customers in Selangor, Kuala Lumpur, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kedah, Perlis, Terengganu, Sarawak and Sabah.
Contact MTM Precision
MTM Precision Sdn Bhd
Website: www.mtmpre.com
Email: mtmpre@yahoo.com
WhatsApp: 016-660 7346
Showroom & Service Centre
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.
For quotation, send us the target gas, required measuring range and intended application. This helps us check whether MS104K-S2 LEL + O₂ or another gas-detector configuration is more appropriate.
13 Sep 2026
