| Model | TDRF-1 | TDRF-2 | TDRF-3 |
| Condenser cooling way | air-cooling | air-cooling | air-cooling |
| Number of test pieces (pieces) | 28 | 16 | 10 |
| Specimen size(mm) | 100×100×400，The temperature measuring parts are of the same size, and there are temperature measuring holes in the middle. | 100×100×400，The temperature measuring parts are of the same size, and there are temperature measuring holes in the middle. | 100×100×400，The temperature measuring parts are of the same size, and there are temperature measuring holes in the middle. |
| Freezing end time/test piece center temperature(℃) | 1.5～2.5h/-17±2（New standard -18±2） | 1.5～2.5h/-17±2（New standard -18±2） | 1.5～2.5h/-17±2（New standard -18±2） |
| Melting end time/test piece center temperature(℃) | 1.0～1.5h/8±2℃（New standard 5±2） | 1.0～1.5h/8±2℃（New standard 5±2） | 1.0～1.5h/8±2℃（New standard 5±2） |
| Freeze-thaw cycle | 2．5～4h，The melting time is not less than 1/4 freeze-thaw cycle. | 2．5～4h，The melting time is not less than 1/4 freeze-thaw cycle. | 2．5～4h，The melting time is not less than 1/4 freeze-thaw cycle. |
| The temperature difference between the center and the surface of the specimen(℃) | ＜28 | ＜28 | ＜28 |
| Number of cycles | The standard is 300 times, and the number of cycles can be adjusted | The standard is 300 times, and the number of cycles can be adjusted | The standard is 300 times, and the number of cycles can be adjusted |
| Temperature recorder | LCD touch screen controller | LCD touch screen controller | LCD touch screen controller |
| Freeze-thaw cycle medium | -45°C antifreeze (1:1 mixed with water) | -45°C antifreeze (1:1 mixed with water) | -45°C antifreeze (1:1 mixed with water) |
| Amount of freeze-thaw cycle media charged（kg） | 90 | 60 | 30 |
| Refrigerator compressor | Complete inlet closure 8.5HP | 5HP | 3HP |
| Specimen barrel size(mm) | 115×115×490 | 115×115×490 | 115×115×490 |
| Heating power(kW) | 9 | 6 | 4.5 |
| Maximum operating power(kW) | 11 | 8 | 6 |
| Voltage | AC380V±10%，50Hz | AC380V±10%，50Hz | AC380V±10%，50Hz |
| Overall dimensions(mm) | 1870×1370×1000 | 1870×1000×1000 | 1620×1000×1000 |
