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SYA-16 Digital Display Oxygen Index Analyzer

This instrument is used to determine the volume percentage of oxygen required during the combustion of polymers. The oxygen index of a polymer is defined as the minimum oxygen concentration in an oxygen–nitrogen mixture that just sustains the combustion of the specimen, measured either after ignition when the flame has propagated 50 mm or after a burn time of 180 seconds. This value is also referred to as the oxygen index.

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Building Energy-Efficient Material Testing Equipment

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lbt@lbt.ltd

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SYA-16 Digital Display Oxygen Index Analyzer

Description

Product Introduction:

This instrument not only serves as a means to assess the flame retardancy of polymers but also functions as a research tool, providing a robust testing platform for laboratory studies on flame-retardant formulations and the development of novel flame‑retardant materials. It is suitable for evaluating the combustibility of solid materials, laminated composites, foamed plastics, fabrics, flexible sheets, and thin films.

The instrument features a well‑designed structure and is easy to operate, maintain, and service. Its testing system employs an imported oxygen sensor and displays results digitally. With advantages such as accurate judgment and excellent reproducibility, it is an ideal testing device for research and production quality control.

Scope of Application:

It is suitable for determining the combustion performance of materials such as plastics, rubbers, fibers, foam plastics, flexible sheets and films, and textiles.

Technical Specifications:

Parameter Item	Technical Specifications
Oxygen sensor	Imported oxygen sensor with digital direct display of oxygen concentration from 0% to 100%, eliminating the need for conversion and delivering high accuracy.
Oxygen concentration resolution	±0.1%
Measurement accuracy	Class 0.4
Flow regulation range	0–10 L/min (60–600 L/h)
Response time	<5S
Combustion tube dimensions	Inner diameter ≥ 75 mm, height 400 mm
Gas flow rate in the combustion tube	40mm±10mm/s
Pressure gauge parameters	Accuracy class 2.5, resolution 0.01 MPa
Adjustable range of the flow meter	1–15 L/min (60–900 L/h)
Mixture inlet configuration	Includes a pressure regulator, a flow control valve, a gas filter, and a mixing chamber.
Materials Suitable for the Specimen Holder	Soft/hard plastics, textiles, fire doors, etc.
Propane/Butane Ignition System	Flame length: 5 mm–60 mm, freely adjustable.
Required Complementary Gas Supply	Industrial-grade nitrogen and oxygen, with purity greater than 99% (provided by the user).
Igniter Specifications	Made of metal tubing, with a nozzle inner diameter of Φ2±1 mm; flame length is adjustable at 16±4 mm and can be extended into the combustion chamber for ignition.
Self-supporting specimen holder	It can be fixed at the axis of the combustion tube and hold the specimen vertically.
Non-self-supporting specimen holder	It can simultaneously secure two perpendicular edges of the specimen to the frame.

Operating conditions of the instrument

Parameter Item	Technical Specifications
Ambient operating temperature	-10℃ to 45℃
Relative environmental humidity	<85%
Electrical Specifications	220V, 50Hz, 100W
Implement gas standards	Oxygen: GB 3863 Industrial Gaseous Oxygen; Nitrogen: GB 3864 Industrial Gaseous Nitrogen; Both cylinders require a high-pressure valve.
Gas inlet pressure	0.2–0.3 MPa
Work partial pressure	Nitrogen: 0.1–0.15 MPa; Oxygen: 0.1–0.15 MPa

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

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Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

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Customer Reviews

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

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SYA-16 Digital Display Oxygen Index Analyzer

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