Home >> Products >> Plastic Pipe Industry Testing >> Testing machine for pipe lab >> Oxidative Induction Time testing machine
 Differential scanning Calorimeter

Oxidative Induction Time testing machine

Model: UT3335, ISO 6964, ISO 1408

UT3335 Differential scanning calorimeter is one kind of thermal analysis method instrument, under controlled temperature, check the relation of temperature with the rate differential input in test sample and reference articles.  The curve recorded is DSC curve, heat flow rate dH/dt is Y-axis, temperature T or time t is X-axis, can measure various kind of thermodynamics and kinetic parameter, like specific heat capacity, reaction heat, heat of transformation, phase diagram, reaction rate, cystallization rate, sample purity etc.,  with wide temperature range (-100~800℃), high resolutions, less sample using. Used to test inorganic material, organic compounds, pharmaceutical analysis etc.,  can be used to do Oxidative Induction Time test, heat stability, glass transition temperature, melting point, cold crystallization, crystallization, phase transition,  etc., 


Oxidation induction time or OIT is a standardized test performed in a DSC ( Differential scanning Calorimeter) which measures the level of thermal stabilization of the material tested. The time between melting and the onset of decomposition in isothermal conditions is measured. The atmosphere is nitrogen up to melting and then oxygen. The typical temperature is 190-220 °C.

General Introduction

UT3335 Differential scanning calorimeter is one kind of thermal analysis method instrument, under controlled temperature, check the relation of temperature with the rate differential input in test sample and reference articles.  The curve recorded is DSC curve, heat flow rate dH/dt is Y-axis, temperature T or time t is X-axis, can measure various kind of thermodynamics and kinetic parameter, like specific heat capacity, reaction heat, heat of transformation, phase diagram, reaction rate, cystallization rate, sample purity etc.,  with wide temperature range (-100~800℃), high resolutions, less sample using. Used to test inorganic material, organic compounds, pharmaceutical analysis etc.,  can be used to do Oxidative Induction Time test, heat stability, glass transition temperature, melting point, cold crystallization, crystallization, phase transition,  etc., 

Oxidative Induction Time testing machine

Oxidation induction time or OIT is a standardized test performed in a DSC ( Differential scanning Calorimeter) which measures the level of thermal stabilization of the material tested. The time between melting and the onset of decomposition in isothermal conditions is measured. The atmosphere is nitrogen up to melting and then oxygen. The typical temperature is 190-220 °C.



Key Features

  • Features
  • References standard

1. Industrial grade 7 inch touch screen, display rich information.

2. Brand new ceramic furnace structure, better baseline and higher precision. The heating adopts indirect conduction mode, which has high uniformity and stability, reduces pulse radiation, and is better than the traditional heating mode.

Oxidative Induction Time testing machine

3. USB communication interface, strong versatility, reliable communication without interruption, support self-recovery connection function.

4. Automatically switch two air flow rates, fast switching speed and short stabilization time. At the same time, a shielding gas input is added.

5. The software is simple and easy to operate.

BS EN 728

Plastics piping and ducting systems. Polyolefin pipes and fittings. Determination of oxidation induction time.


ISO 11357-6:2018
Plastics -- Differential scanning calorimetry (DSC) -- Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT)


ASTM D3417
Standard Test Method for Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry (DSC)

Main Technical Specification

Temperature rangeRoom temperature ~ 600°C (air cooling)
Heating rate0.1~100°C/min
Temperature resolution0.01°C
Temperature 0.1 ℃ accuracy±0.01°C
Temperature repeatability±0.1°C
Constant temperature timeprogram setting
Temperature control modePID temperature control, temperature rise, constant temperature (automatic program control)
Atmosphere control gasnitrogen, oxygen (automatic switching of instrument)
Gas flow0-300mL/min
Gas pressure0.2MPa
The measuring range0~±600mW
DSC resolution0.01μW
DSC sensitivity0.001μW
Display mode24bit color, 7 inch LCD touch screen display
Data interfacestandard USB interface
Parameter standardequipped with standard materials (indium, tin), users can correct the temperature by   themselves
Curve scanningtemperature rise scan, cooling scan, constant temperature scan
DisplayLarge LCD screen EnglighWith English software, can install on user's computer
Power220V, 50HZ
The instrument has multiple sets of thermocouples, one set to test the sample temperature, and one group to test the internal ambient temperature of the instrument.The instrument has multi-point correction function, which can meet the accurate testing of high, medium and low samplesThe software can set the data acquisition frequency, and can export EXECL data packages and PDF reports


OIT tester in test

Touchung screen Oxidation induction time tester

Differential scanning Calorimeter

24bit color, 7 inch LCD touch screen display

Oxidative Induction Time test (OIT) equipment

equipped with standard materials (indium, tin), users can correct the temperature by themselves

Partial test case graph analysis:

1.PE. Oxidation period test of PPR and other pipes:

Oxidation induction time (OIT) is measured by DSC (Differential Scanning Calorimeter). The specimen is usually heated to a specified temperature and constant temperature under a nitrogen atmosphere, and then switched to an oxygen atmosphere, after which the material begins to oxidize and heat is released. This release heat is detected by the sensor, through software analysis, the induced oxidation time (OIT), the length of the oxidation induction time is a parameter of the oxidative decomposition resistance of the reaction material, or very meaningful, usually buried plastic pipes must detect this parameter.

Oxidative Induction Time testing machine

2. Glass testing of resin and other materials:

For amorphous polymers, when the polymer changes from a highly elastic state to a glassy state through cooling, or from a glassy state to a highly elastic state through heating, it is called a glass transition, and the temperature at which the glass transition occurs is called the glass transition temperature. For crystalline polymers, the glass transition refers to the transformation from a highly elastic state to a glassy state (or a glassy to a highly elastic state) in its amorphous part. Therefore, glass transition is a common phenomenon in polymers. However, the phenomenon of glass transition is not limited to polymers, and some small molecule compounds also have glass transition.

 Oxidative Induction Time testing machine

3. Material melting point, enthalpy test (thermal stability test)

The melting point is the temperature at which a solid converts its state of matter from a solid state or melts into a liquid state, and the multi-component mixture produces a multi-peak peak

 Oxidative Induction Time testing machine

4. Curing test of glue and other materials

It refers to the process of changing the substance from low molecular weight to high molecule, and the strength of the cured sample will be higher

Oxidative Induction Time testing machine

Require More Customized Solutions?

We offer customization to meet your specific needs. Our expert team will collaborate with you to develop the perfect product for you
Customize Now

Beijing United Test Co., Ltd.