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| Home > Products > Cryogenic Temperature Instruments > Cryogenic Temperature Controllers > Model 321 |
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Model 321 Cryogenic Temperature Controller |
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| The Model 321 temperature controller is obsolete and has been replaced by the new Model 325 temperature controller. |
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| Sensor Temperature Range (sensors sold separately) |
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| Silicon diodes are the best choice for general cryogenic use from 1.4 K to above room temperature. Diodes are economical to use because they follow a standard curve and are interchangeable in many applications. They are not suitable for use in ionizing radiation or magnetic fields. |
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Platinum RTDs offer high uniform sensitivity from 30 K to over 800 K. With excellent reproducibility, they are useful as thermometry standards. They follow a standard curve above 70 K and are interchangeable in many applications. |
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Model |
Useful Range |
Magnetic Field Use |
Diodes
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Silicon Diode |
DT-670-SD |
1.4 K to 500 K |
T ≥ 60 K & B ≤ 3 T |
| Silicon Diode |
DT-670E-BR |
30 K to 500 K |
T ≥ 60 K & B ≤ 3 T |
| Silicon Diode |
DT-414 |
1.4 K to 375 K |
T ≥ 60 K & B ≤ 3 T |
| Silicon Diode |
DT-421 |
1.4 K to 325 K |
T ≥ 60 K & B ≤ 3 T |
| Silicon Diode |
DT-470-SD |
1.4 K to 500 K |
T ≥ 60 K & B ≤ 3 T |
| Silicon Diode |
DT-471-SD |
10 K to 500 K |
T ≥ 60 K & B ≤ 3 T |
Positive Temperature
Coefficient RTDs
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100 W Platinum |
PT-102/3 |
14 K to 873 K |
T > 40 K & B ≤ 2.5 T |
| 100 W Platinum |
PT-111 |
14 K to 673 K |
T > 40 K & B ≤ 2.5 T |
| Rhodium-Iron |
RF-800-4 |
1.4 K to 500 K |
T > 77 K & B ≤ 8 T |
| Rhodium-Iron |
RF-100T/U |
1.4 K to 325 K |
T > 77 K & B ≤ 8 T |
Thermocouples
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Type K |
9006-006 |
3.2 K to 1369 K |
Not Recommended |
| Type E |
9006-004 |
3.2 K to 871 K |
Not Recommended |
| Chromel-AuFe 0.07% |
9006-002 |
1.2 K to 610 K |
Not Recommended |
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