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| Home > Products > Cryogenic Temperature Instruments > Cryogenic Temperature Controllers > Model 325 |
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Model 325 Cryogenic 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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| Cernox™ thin-film RTDs offer high sensitivity and low magnetic field-induced errors over the 2 K to 420 K temperature range. Cernox sensors require calibration. |
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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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2 Single excitation current may limit the low temperature range of NTC resistors
3 Non-HT version maximum temperature: 325 K
4 Low temperature limited by input resistance range
5 Low temperature specified with self-heating error: ≤5 mk
6 Low temperature specified with self-heating error: ≤12 mk |
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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 |
| GaAlAs Diode |
TG-120-P |
1.4 K to 325 K |
T > 4.2 K & B ≤ 5 T |
| GaAlAs Diode |
TG-120-PL |
1.4 K to 325 K |
T > 4.2 K & B ≤ 5 T |
| GaAlAs Diode |
TG-120-SD |
1.4 K to 500 K |
T > 4.2 K & B ≤ 5 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 |
Negative Temperature
Coefficient RTDs2
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Cernox™ |
CX-1010 |
2 K to 325 K5 |
T > 2 K & B ≤ 19 T |
| Cernox™ |
CX-1030-HT |
3.5 K to 420 K3.6 |
T > 2 K & B ≤ 19 T |
| Cernox™ |
CX-1050-HT |
4 K to 420 K3.6 |
T > 2 K & B ≤ 19 T |
| Cernox™ |
CX-1070-HT |
15 K to 420 K3 |
T > 2 K & B ≤ 19 T |
| Cernox™ |
CX-1080-HT |
50 K to 420 K3 |
T > 2 K & B ≤ 19 T |
| Germanium |
GR-200A/B-1000 |
2.2 K to 100 K4 |
Not Recommended |
| Germanium |
GR-200A/B-1500 |
2.6 K to 100 K4 |
Not Recommended |
| Germanium |
GR-200A/B-2500 |
3.1 K to 100 K4 |
Not Recommended |
| Carbon-Glass |
CGR-1-500 |
4 K to 325 K5 |
T > 2 K & B ≤ 19 T |
| Carbon-Glass |
CGR-1-1000 |
5 K to 325 K5 |
T > 2 K & B ≤ 19 T |
| Carbon-Glass |
CGR-1-2000 |
6 K to 325 K5 |
T > 2 K & B ≤ 19 T |
| Rox™ |
RX-102A |
1.4 K to 40 K5 |
T > 2 K & B ≤ 10 T |
Thermocouples
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Type K |
9006-006 |
3.2 K to 1505 K |
Not Recommended |
| Type E |
9006-004 |
3.2 K to 934 K |
Not Recommended |
| Chromel-AuFe 0.07% |
9006-002 |
1.2 K to 610 K |
Not Recommended |
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