Limiting Oxygen Index (LOI) Tester
Product Specification Sheet
Limiting Oxygen Index (LOI) Tester
Model Number: MTFT-04
The Limiting Oxygen Index (LOI) Tester from Micro Technologies is a specialized fire and flammability testing instrument designed to determine the minimum concentration of oxygen in an oxygen-nitrogen mixture required to support sustained combustion of a material. It is suitable for evaluating plastics, polymers, rubber, cables, fabrics, insulation materials and other combustible specimens under controlled laboratory conditions.
Product Specification
The Limiting Oxygen Index (LOI) Tester from Micro Technologies is designed for quantitative evaluation of material flammability by determining the minimum oxygen concentration necessary to sustain combustion under specified test conditions. The resulting oxygen index provides a useful parameter for comparing the relative burning behaviour of different materials.
The apparatus uses controlled supplies of oxygen and nitrogen to create a defined gas mixture around the vertically positioned test specimen. By adjusting the proportion of the two gases, the oxygen concentration surrounding the specimen can be precisely varied during testing.
The specimen is positioned within a transparent vertical test column and ignited according to the applicable test procedure. Its burning behaviour is then observed while the oxygen concentration is progressively adjusted to identify the limiting condition at which combustion can be sustained.
The resulting Limiting Oxygen Index (LOI) is generally expressed as the percentage concentration of oxygen in the oxygen-nitrogen mixture. Materials requiring a higher oxygen concentration to sustain burning generally exhibit greater resistance to continued combustion under the specified test conditions.
The system incorporates suitable gas-flow control and monitoring arrangements for regulating oxygen and nitrogen supplies. Flow measurement components enable the required gas mixture to be established consistently for repeatable laboratory investigations.
The transparent combustion column provides clear visibility of the specimen and flame during testing. The integrated control arrangement enables convenient adjustment of operating conditions while keeping the test setup compact and accessible.
The LOI Tester is particularly useful for comparative evaluation of plastics, polymers, rubber compounds, electrical cables, insulation, fabrics, textiles, foams and composite materials. It can support material selection, formulation development, quality control and fire-performance research.
Manufactured and supplied by Micro Technologies, the Limiting Oxygen Index Tester is suitable for fire testing laboratories, polymer laboratories, cable testing facilities, textile laboratories, research institutes, quality-control departments and industrial material-testing facilities.
Features
- Limiting Oxygen Index measurement
- Controlled oxygen and nitrogen mixing
- Transparent vertical combustion column
- Adjustable gas-flow arrangement
- Individual gas-flow monitoring
- Controlled specimen positioning
- Clear flame and specimen visibility
- Suitable for comparative flammability testing
- Integrated operating controls
- Compact laboratory configuration
- Repeatable test arrangement
- Suitable for multiple combustible material categories
Benefits
- Quantifies the oxygen concentration required to sustain combustion
- Provides useful comparative flammability data
- Helps evaluate fire behaviour of different material formulations
- Controlled gas mixture improves test repeatability
- Suitable for product development and quality control
- Supports material selection and fire-performance research
- Applicable across plastics, cables, rubber and textile industries
- Compact configuration is suitable for laboratory installation
Typical Test Parameters
| Parameter | Evaluation |
|---|---|
| Limiting Oxygen Index | LOI |
| Oxygen Concentration | Percentage in Gas Mixture |
| Test Gases | Oxygen & Nitrogen |
| Specimen Orientation | Vertical |
| Combustion Behaviour | Sustained / Non-Sustained Burning |
| Gas Flow | Controlled |
| Flame Behaviour | Visual Observation |
| Burning Time | According to Test Method |
| Burning Length | According to Test Method |
| Test Environment | Controlled Gas Atmosphere |
Exact flow ranges, column dimensions, specimen holders, gas-control system and measurement specifications can be configured according to the required test method.
Applications
- Limiting Oxygen Index determination
- Plastic flammability testing
- Polymer combustion testing
- Rubber material testing
- Cable and wire insulation testing
- Textile and fabric testing
- Foam flammability evaluation
- Composite material testing
- Insulation material evaluation
- Material formulation comparison
- Fire-performance research
- Quality-control testing
- Product development
Industries Served
Plastics Industry, Polymer Industry, Rubber Industry, Wire & Cable Industry, Electrical Industry, Textile Industry, Automotive Materials, Construction Materials, Research Institutes, Fire Testing Laboratories, Material Testing Laboratories, Quality Control Laboratories
Available Variants
Limiting Oxygen Index Tester, LOI Tester, Oxygen Index Tester, Laboratory Oxygen Index Apparatus, Material Flammability LOI Tester, Plastic Oxygen Index Tester, Cable Oxygen Index Tester, Polymer Flammability Tester
FAQs
What is a Limiting Oxygen Index Tester?
A Limiting Oxygen Index Tester is an instrument used to determine the minimum oxygen concentration in an oxygen-nitrogen atmosphere required to sustain combustion of a test material under specified conditions.
What does LOI mean in flammability testing?
LOI stands for Limiting Oxygen Index. It expresses the minimum oxygen concentration required for a material to continue burning under defined test conditions.
What materials can be tested using an LOI Tester?
Depending on the applicable test method and specimen configuration, it can be used for plastics, polymers, rubber, cable insulation, textiles, fabrics, foams, composites and other suitable materials.
Which gases are used in an Oxygen Index test?
The test typically uses a controlled mixture of oxygen and nitrogen to establish the required oxygen concentration around the specimen.
What does a higher LOI value indicate?
Within comparable test conditions, a higher LOI value means the material requires a higher oxygen concentration to sustain combustion, indicating greater resistance to continued burning in that specific test.
Is the specimen tested vertically?
Yes. In typical LOI testing, the specimen is supported vertically within a transparent combustion column, subject to the applicable test method.
Is the LOI Tester suitable for cable and plastic testing laboratories?
Yes. It is particularly useful for plastics, polymers, cable insulation, rubber and related material flammability evaluation.
Why Choose Our Products
- Manufactured and supplied by Micro Technologies
- Professional material flammability testing solution
- Controlled oxygen and nitrogen flow system
- Suitable for multiple material categories
- Designed for repeatable laboratory measurements
- Suitable for R&D and industrial quality control
- Custom configurations available according to testing requirements
- OEM, institutional and bulk supply available
Call to Action
Evaluate material flammability with greater precision using the Limiting Oxygen Index (LOI) Tester from Micro Technologies. Share your material type, required testing standard and technical specifications with us for the appropriate system configuration, competitive quotation, institutional procurement, OEM supply and bulk requirements.
