ISO 4589.2 GB/T 2406.2 Oxygen Index Tester | Plastic LOI Limiting Oxygen Index Test Apparatus – Shenyang Baoruitong Automation Equipment Co., Ltd.

Description

ISO 4589 & GB/T 2406 JYZS-10 LOI Oxygen Index Tester | Plastic Flammability Test Equipment

1. Product Overview

The JYZS-10 Oxygen Index Tester is a standard desktop laboratory instrument engineered to ISO 4589 and GB/T 2406 series standards. It precisely measures the Limiting Oxygen Index (LOI), the minimum oxygen percentage required to sustain stable vertical combustion of solid specimens inside a transparent glass chimney with blended oxygen-nitrogen airflow.

By calculating LOI values, manufacturers and labs evaluate flame retardancy and fire classification of raw materials for incoming quality control, third-party fire certification, and new flame retardant material R&D. The separate dual gas pressure & flow control panel delivers stable mixed gas ratios, with digital oxygen readout and fast sensor response for consistent, repeatable flammability test results.

2. Applicable Global & National Standards

ISO 4589.1-2017: General rules for plastic oxygen index testing
ISO 4589.2-2017: Ambient-temperature LO test method
GB/T 2406.1-2008: Guidance for oxygen index measurement
GB/T 2406.2-2009: Ambient oxygen index test for plastics
GB 8624-2025: Fire performance classification for building materials

3. Test Application Scope

Suitable for vertical strip/block specimens with thickness ≤10.5 mm:

Homogeneous solids, laminated composites, rigid foam (density >100 kg/m³)
Partial low-density foam materials (density ＜100 kg/m³, GB/T 8332 equipment required for full flame spread evaluation)

Common test samples: plastics, rubber, thermal insulation foam, protective textiles, XPS/EPS boards, fiberglass, wires & cables, waterproof rolls, fiber cords, fire retardant coatings, polyurethane, asphalt, films, wood sheets.

4. Core Technical Specifications

Main Instrument Performance

Oxygen concentration measuring range: 0–100%
Measuring precision: ±0.1%
Digital oxygen display with zero & full-scale calibration functions
Working air pressure: 0.05–0.15 MPa
Pressure gauges: 0–0.4 MPa, Class 2.5 accuracy
Gas flow adjustable range: 0–15 L/min, Class 2.5 flowmeter
Sensor response time: Less than 5 seconds
Transparent combustion chamber: ID 75 mm, height 480 mm (excluding neck)
Standard internal airflow speed: 40 ± 2 mm/s

Environment & Power & Gas Requirements

Standard lab environment: 23℃ ±2℃, relative humidity ≤70%
Power supply: AC 220V ±5%, 50Hz, rated power 50W
Required test gas: Oxygen & Nitrogen with purity ≥98%
Gas supply pressure: 0.1–0.3 MPa
Auxiliary accessories (gas cylinders, pressure reducers, dryers): Supplied by customer

5. Core Product Features

Full compliance with ISO 4589 and GB/T 2406 international & domestic LOI standards

All chamber size, airflow velocity and gas mixing parameters match standard requirements; test LOI data is recognized for global flame retardant certification and building material fire grading per GB 8624-2025.
Ultra-precise oxygen detection with ±0.1% accuracy

High-sensitivity oxygen sensor with rapid 5-second response; supports zero and full-scale manual calibration to maintain long-term stable measurement without frequent rechecks.
Independent dual gas pressure & fine flow control system

Separate pressure gauges and fine-tuning knobs for O₂ and N₂; vertical total flow rotameter enables quick, accurate adjustment of oxygen-nitrogen mixing ratios to reach target LOI levels efficiently.
Standard transparent vertical glass combustion chimney

75mm inner diameter clear glass tube offers full unobstructed observation of flame stability, self-extinguishing and combustion state without disturbing standardized internal airflow.
Constant standardized airflow inside the chamber

Internal structural design maintains steady 40±2 mm/s upward gas velocity, eliminating airflow fluctuation interference and ensuring highly repeatable test results across batches.
Compact low-power desktop design

Only 50W power consumption, small bench footprint, lightweight and easy to install, operate and maintain for small QC workshops and large third-party testing centers.
Extensive compatibility for multi-type industrial materials

Covers plastics, rubber, insulation foam, cables, textiles, wood, composite panels and waterproof materials; works for thin films and rigid block samples for full production line flammability inspection.
Simple, intuitive control panel for easy operation

Dedicated independent knobs for gas pressure and flow, clear digital oxygen readout; minimal training required for lab technicians to complete full LOI testing workflow independently.

6. Application & Target Customers

Plastic, rubber and composite material manufacturers
Wire, cable and thermal insulation foam production factories
Construction insulation, waterproof and decorative material plants
Textile, fiber and fire-resistant fabric manufacturers
Third-party fire safety testing & certification laboratories
Flame retardant additive and new material R&D institutes

7. Why Choose JYZS-10 Oxygen Index Tester

✅ Fully meets ISO 4589 and GB/T 2406 standard specifications for plastic & construction material LOI flame retardant testing
✅ ±0.1% high-precision oxygen detection with fast <5s sensor response and dual calibration functions
✅ Separate O₂ & N₂ pressure gauges + fine-tuning valves for precise mixed gas ratio adjustment
✅ Standard transparent glass chimney with fixed 40±2 mm/s internal airflow for consistent test conditions
✅ Compact desktop unit with ultra-low 50W power consumption, saves valuable lab bench space
✅ Compatible with most vertical solid samples: plastics, cables, foam, rubber, textiles and wood panels
✅ Simple control layout, stable long-term performance and low daily maintenance costs