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Gas Detector

GIANTECH provides solutions using high-quality, fixed and portable gas detectors for various applications. We’re committed to serve our customers with only first-class products and services.

We use only quality components. Our products have an exceptionally long life span, and many of these systems last more than 20 years.

Why is Gas Detection Critical?

Early Detection Explosive Gases

Early Detection of Explosive Gases

Working with combustible gases and liquids involves a risk of explosive vapours. Our explosion-proof detector is ATEX certified and is thus suitable for use in Zone 1 and Zone 2 areas. The central gas alarm unit monitors the air continuously and will set off an alarm before an explosive mixture of gases forms and reaches the Low Explosion Limit (LEL), which might lead to an accident.

Our products are ATEX certified, approved by the Danish Institute of Fire Safety Technology (DBI), and DEMKO/UL.


What are Explosion Limits?

The occurrence of an explosion requires 3 conditions to be met:

  1. Occurrence of concentrated Combustible Gas or Vapour between LEL and HEL
  2. Presence of Oxygen
  3. An Ignition Source

LEL (Low Explosion Limit) refers to the minimum concentration of the particular combustible gas or vapour necessary to start a combustion.

High Explosive Limit (HEL) refers to the maximum concentration of a gas that will burn in air.

Explosion occurs when concentrated gas and vapour exist between LEL and HEL limits.

Example of some common combustible gases’ LEL and HEL

Acetylene 1.5 80.0
Hydrogen 4.0 80.0
Methane 4.5 16.5
Propane 1.7 10.9
Propylene 2.0 11.1
Toluene 1.2 7.0

The lower the LEL, the more dangerous the substance. Our gas detector helps monitor the air continuously to prevent explosion from happening by keeping concentration out of the LEL~HEL range.

Classification of Hazardous Areas (Zoning)

Zone 0: An area where a combustible concentration of flammable gases is always present continuously or over long periods of time.

Zone 1: An area where combustible concentrations of flammable gases or vapours are likely to occur under normal operating conditions.

Zone 2: An area where combustible concentrations of gases or vapours are unlikely to occur under normal operation conditions, and if they do occur, will only persist for a short period of time.

Prevent Harmful Gases

Prevent Build-up of Harmful Gases and Vapours

In many industries and research environments, various solvents are used, which by way of evaporation or chemical reaction may develop into harmful gases and vapours.

These gases are immediately detected by our gas detectors and thus help in reducing damage to your health.


Common Gases That Can be Harmful

Carbon Monoxide

Carbon Monoxide (CO)

Carbon monoxide is a toxic gas that may form in underground car parks, tunnels, garages, and places where internal-combustion engines are used. Concerns arise in confined areas, or when ventilation is poor.

Carbon monoxide is odourless and colourless, and thus might go unnoticed without a gas detector. Inhaled carbon dioxide is harmful as it affects the delivery of oxygen throughout the body. This can cause dizziness and passing out.

A mere concentration of 0.01% can lead to mild headaches. In severe cases, it might even lead to brain damage and death.

Symptoms of carbon monoxide poisoning:

  • Mild headache
  • Dizziness
  • Vomiting
  • Shortness of Breath
  • Diminished Vision
  • Cardiovascular Toxicity
  • Seizures
  • Coma
  • Death

Carbon Dioxide

Carbon Dioxide (CO2)

Carbon dioxide that occurs naturally in earth’s atmosphere is harmless. But in a working or home environment, an increase in carbon dioxide levels can be harmful to health.

Carbon dioxide is odourless and colourless and therefore can be hard to detect without a gas detector. It is commonly used in several industries which manufacture fire extinguishers and dry ice, and as a coolant gas in power stations.

Exposure to low concentrations of carbon dioxide can lead to breathing difficulties, increased blood pressure, and dizziness. Exposure to 10% or more can cause serious consequences like damaging a fetus or death.


Chlorofluorocarbon (CFC) or Freon

CFCs are a family of chemical compounds that are widely used as refrigerants and propellants in aerosol dispensers. They are also commonly known as Freon.

Freon gas is difficult to detect without gas leak detectors as it is colourless and relatively odourless.

Potential leakages in connection with refrigerating systems (e.g. air-conditioning and cold storage) will not only affect the environment, but can also be life-threatening.

Mild exposure to Freon is normally harmless. But in rare cases, symptoms of mild poisoning include headache, cough, dizziness and irritation to eyes, ears and throat. Should severe poisoning occur, symptoms can include seizures, difficulty in breathing or even vomiting of blood.



Marine & Offshore

Marine & Offshore

Gas detection in maritime industry is of utmost importance, where its environments consist of machinery, containers and gas tanks. These places are prone to risks from toxic or explosive gases, due to limited ventilation. GIANTECH has a product line, specially designed for the maritime market, which is CE compliant, and in accordance with MED directive 961981.

Potential hazardous gases to detect: CO2, Freon (R404, R407, R134 etc.)

Industrial Power Plants

Industrial Power Plants

These are environments which handle various gases and chemicals, which might lead to explosion hazards. Continuously monitoring the concentration of certain gases or detection of gas leakages is a process which absolutely cannot be compromised.

Potential hazardous gases to detect: H2, O2, CH4

All our products have up to 3 years warranty.

Underground Carparks

Underground Carparks, Garages & Tunnels

Toxic gases like carbon monoxide, nitrogen oxides and hydrocarbons occur in underground carparks, garages and places where there are combustible engines. It is necessary to have proper ventilation and gas detection solutions as the buildup of these gases can lead to serious health issues.

Potential hazardous gases to detect: NOx, CO, CH (Hexan)

Construction Sites

Construction Sites

To safeguard against any potential gas leaks which can lead to explosions at construction sites, we have mobile gas leak detectors that are designed especially for use at the construction sites.

Chemical Plants

Chemical Plants

Chemical plants, by nature of their operations, will inevitably involve toxic or explosive chemicals. Gas detectors are essential pieces of equipment, which detect poisonous gas emissions and potential gas leaks.

  • Medical/Pharmaceuticals/Biotech Labs
  • Biogas/ WWTP (Wastewater Treatment Plants) and Chemical Facilities

Pharmaceutical Industry

Pharmaceutical Industry

The pharmaceutical industry requires constant monitoring of hazardous gases in laboratories and production plants, as toxic gases are often used in these confined places.

Potential hazardous gases to detect: NH3, N2

We have more than 20,000 units in operation across various industries worldwide.


Some of Our Standard Solutions

Standard Systems

Besides our standard systems, we also have the ability to customize specific solutions based on our customers’ needs.

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