An OIT apparatus based on the Differential Thermal Analysis (DTA) principle, checking the oxidation induction time of polymers — a very sensitive test needing only 8–10 mg of sample, at 200 °C under an 80 cc/min oxygen flow.
Polyolefins are protected from thermal-oxidative degradation by antioxidants, and Oxidation Induction Time measures how much protection remains. A small sample (8–10 mg) is held isothermally in a reference/specimen pan pair; nitrogen is switched to oxygen and the time to the exothermic onset of oxidation is recorded. A short OIT means the stabiliser package is inadequate or depleted.
International Equipments builds an OIT apparatus on the DTA principle — barrel water-cooled, a digital PID controller to 300 °C ±0.5 °C, precision N₂/O₂ regulators and rotameters, and Indium-melting-point temperature calibration per DOT specification. Results (Delta Temperature vs Time and OIT) are graphed and printed through a PC. Manufactured in Mumbai, CE marked and calibration-certified.
Representative specifications; configuration on request.
| Principle | Differential Thermal Analysis (DTA) |
|---|---|
| Temperature controller | Digital PID, up to 300 °C, resolution 0.1 °C, accuracy ±0.5 °C |
| Cooling | Water cooling of the barrel |
| Sample pans | 500 nos. SS316 aluminium pans with 40-mesh screen (per DOT spec) |
| Gas flow control | Regulators & rotameters for N₂ and O₂ |
| Calibration | Indium (m.p. 156.6 °C) per DOT spec |
| PC printout | Delta Temperature vs Time graph + OIT result, with client, batch, operator, sample weight, gas flow, times |
| Paint | Powder coated |
| Power | 230 V, 50 Hz, single phase |
Send your material, test standard and throughput. We'll respond within one business day with a configuration and quote.
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