5 in 1 Gas Detector Comply IMO MSC.581(110)

Model: G999M with NiMH battery pack and internal pump

With the following sensors:

O2, Range 0 to 25 Vol%

CH4,Range 0 to 100 % LEL

CO, Range 0 to 500 ppm

H2S, Range 0 to 100 ppm

IR CO2 , Range 0 to 5 Vol%

Drop-in charger DIC 888/999 with EU plug-in charger

MADE IN GERMANY

CO2,CO,H2S,O2,CH4

CO2    GAS MONITORING EQUIPMENT

• Battery: An integrated NiMH battery provides an operating time of up to 130 hours, depending on the specific operating mode and sensor configuration.
• Pump: The internal metering pump can sample approximately 0.6 liters per minute from a distance of up to 100 meters. This makes it suitable for clearance measurements before entering potentially hazardous areas.
• Detection: It can detect up to seven different gases simultaneously using various sensor combinations to warn users of toxic, flammable gases/vapors, and oxygen deficiency or excess.
• Alarms: The device warns its wearer in three ways when a threshold is exceeded: visual light signals, vibration, and a loud 103 dB(A) horn.
• Durability: The housing is made of rubberized polycarbonate, providing excellent protection against shocks and vibrations, and is certified as IP67 for dust and water protection. 

A multi-gas detector for O2/LEL/CO/H2S/CO2 is a portable safety device that simultaneously monitors five critical gases: Oxygen (O2 - deficiency/enrichment), Lower Explosive Limit (LEL - flammable gases like methane), Carbon Monoxide (CO - toxic), Hydrogen Sulfide (H2S - toxic/flammable), and Carbon Dioxide (CO2 - asphyxiant), providing real-time readings and alarms (sound/light/vibration) for hazardous environments like confined spaces, oil & gas, and mining to prevent accidents. 

Key Gases Detected & Their Risks:

Oxygen (O2): Detects dangerous O2 levels, preventing asphyxiation (low O2) or fire/explosion risks (high O2).

Lower Explosive Limit (LEL): Measures flammable gases (like methane, propane) to warn of explosion hazards, often showing % of the LEL.

Carbon Monoxide (CO): A highly toxic, odorless gas from incomplete combustion, posing severe health risks.

Hydrogen Sulfide (H2S): A poisonous gas with a "rotten egg" smell that can quickly become deadly, common in sewers/refineries.

Carbon Dioxide (CO2): An asphyxiant, especially in confined spaces, that displaces oxygen. 

Features & Use:

Portable & Wearable: Often clip-on designs for hands-free monitoring.

Real-Time Data: Large LCD displays readings for all gases simultaneously.

Alarms: Audible, visual, and vibrating alerts for immediate danger.

Applications: Ideal for confined space entry (tunnels, tanks), emergency response, and industrial sites (oil, chemical, mining). 

Measures to Address the Revised Recommendations for Entering

Enclosed Spaces Aboard Ships (MSC.581(110))

At the 110th session of the Maritime Safety Committee (MSC 110) held in June 2025, the Revised

Recommendations for Entering Enclosed Spaces Aboard Ships were adopted as IMO Resolution

MSC.581(110).

This resolution invited the Assembly to revoke resolution A.1050(27) and aims to prevent fatalities

and serious accidents related to enclosed space entry by clarifying requirements for definitions, risk

assessment, atmosphere testing, carbon dioxide (CO2) management, and emergency preparedness.

This Technical Information provides an overview of the main amendments and highlights important

points to be considered.

1. Outline

Resolution MSC.581(110) is a recommendatory instrument applicable to all ship types.

The resolution recommends that enclosed space entry should be managed within the Safety

Management System (SMS) of the Company.

The key focus areas include:

･ Treating enclosed spaces as unsafe until proven safe

･ Enhanced requirements for carbon dioxide (CO2) monitoring

･ Prohibition of single-person entry

･ Establishment of an Enclosed Space Register

･ Development of ship-specific emergency response plans

･ Strengthening of training and drills

2. Application

･ All ship types

･ All personnel who may enter enclosed spaces, including ship's crew, shore personnel, port

workers and ship operators.

3. Key Safety Requirements

3.1 Basic Principles for Enclosed Space Entry

･ All enclosed spaces should be considered unsafe for entry until declared safe (4.8)

･ Single-person entry is prohibited (3.11)

･ Entry should only be permitted following: (4.1)

- Completion of a risk assessment

- Issuance of an Enclosed Space Entry Permit

3.2 Enhanced Atmosphere Testing Requirements

All ships should carry at least two sets of gas detection equipment as required by SOLAS

regulation XI-1/7, Any ship which may carry a cargo capable of generating hazardous vapors

and which requires regular entry into the cargo space should carry two additional sets (7.3)

Based on the results of the risk assessment, the atmosphere should be tested using

calibrated instruments before entry and during entry: (7.4)

･ Oxygen content: 20.9%

･ Carbon dioxide (CO2): less than 0.5% (5,000 ppm)

･ Flammable gases or vapors: less than 1% of LFL (The assessment has determined that

there is potential for flammable gases or vapors)

･ Toxic gases: below 50% of applicable occupational exposure limits

3.3 Carbon Dioxide (CO2)

･ CO2 is a highly dangerous gas that may cause rapid unconsciousness and death (10.5.5)

･ Particular attention is required for spaces associated with bulk cargoes, organic cargoes,

or cargo residues (10.3)

3.4 Portable Gas Detectors

･ All personnel entering an enclosed space should be provided with portable gas

detectors (8.2)

･ Detectors should be capable of measuring oxygen (O2), carbon dioxide (CO2), flammable

gases/vapors, toxic gases (e.g. CO), and any other gases identified by the risk assessment

(8.2)

3.5 Enclosed Space Entry Permit

･ Entry should be conducted under an Enclosed Space Entry Permit (5.2)

･ The validity of the permit should not exceed 8 hours (5.2)

3.6 Enclosed Space Register

Each ship should maintain an Enclosed Space Register containing, as a minimum: (4.2)

･ Identification of enclosed spaces

･ Space-specific hazards

･ Ventilation and atmosphere testing methods

Information on connected or adjacent spaces

･ Emergency rescue equipment requirements

The register should be managed as part of the SMS and reviewed periodically.

3.7 Emergency Response and Training

･ A ship-specific enclosed space emergency response plan should be established and

incorporated into the SMS (11.1)

･ Rescue equipment should be readily available and maintained in usable condition (11.5)

･ Regular training and drills for enclosed space entry and rescue should be conducted

(3.8)

4. Incorporation into the Safety Management System (SMS)

Ship management companies are recommended to incorporate the following into their SMS in

accordance with MSC.581(110):

･ Enclosed space entry procedures

･ Risk assessment processes

･ Permit-to-work systems

･ Emergency response plans and Enclosed Space Register

･ Training, drills, and authorization

5. Notes

This Technical Information is intended to provide general guidance based on IMO Resolution

MSC.581(110)

For detailed requirements, reference should be made to the original IMO documents.

Please also refer to any instructions issued by the flag Administration, if applicable.

6. References

･ IMO Resolution MSC.581(110)

･ SOLAS Chapter XI-1 Regulation 7

･ SOLAS Chapter III Regulation 19.3.6

･ MSC.1/Circ.1477

IMO regulations regarding

$C{O}_2$

gas detectors primarily focus on safety during enclosed space entry and the monitoring of ship exhaust emissions. 

• Mandatory Testing: Before entering any enclosed space, atmospheric testing must be conducted for Oxygen (
  

  $O_2$
  ), flammable gases (LEL), Carbon Monoxide (
  

  $CO$
  ), and Carbon Dioxide (
  

  $C{O}_2$
  ).
• Exposure Limits: Entry is prohibited until
  

  $C{O}_2$
  readings are confirmed to be below 0.5% by volume (5,000 ppm).
• Equipment Requirements: Under SOLAS Regulation XI-1/7, ships must carry at least two portable multi-gas detectors. While
  

  $C{O}_2$
  was not always a standard sensor in basic 4-gas meters, the new resolution reinforces that it must now be measured.
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