 Back to Model 370 AC Bridge product overview |
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| Lake Shore Germanium GR-200A-30 |
| Sensor properties |
Excitation and instrumentation |
Temperature |
Resistance |
dR/dT |
Thermal
resistance
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Resistance
range
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Excitation
voltage limit
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Excitation
current
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Power |
0.05 K |
25 kW |
-3.5 MW/K |
200 mK/nW |
63.2 kW |
63.2 µV |
1 nA |
25 fW |
0.1 K |
2 kW |
-60 kW/K |
20 mK/nW |
6.32 kW |
63.2 µV |
10 nA |
200 fW |
0.3 K |
172 kW |
-890 W/k |
4 mK/nW |
632 kW |
200 µV |
316 nA |
17 pW |
1 K |
42 kW |
-36 W/k |
0.1 mK/nW |
200 kW |
200 µV |
1 µA |
42 pW |
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| Instrument Performance |
Overall performance |
Temperature |
Measurement
resolution
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Electronic
accuracy
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Calibration
accuracy
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Self-heating
errors
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Interpolation
error
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Overall
accuracy
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0.05 K |
6 W (1.7 µK) |
±13.8 W (1.7 µK) |
±5 mK |
5 µK |
±0.2 mK |
±5.2 mK |
0.1 K |
300 mW (5 µK) |
±1.13 W (19 µK) |
±5 mK |
4 µK |
±0.2 mK |
±5.2 mK |
0.3 K |
10 mW (11 µK) |
±64.2 mW (72 µK) |
±5 mK |
68 µK |
±0.2 mK |
±5.3 mK |
1 K |
3 mW (83 µK) |
±16.6 mW (461 µK) |
±5 mK |
5 µK |
±0.2 mK |
±5.7 mK |
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| Lake Shore 1000 W Ruthenium Oxide RX-102A |
| Sensor properties |
Excitation and instrumentation |
Temperature |
Resistance |
dR/dT |
Thermal
resistance |
Resistance
range |
Excitation
voltage limit |
Excitation
current |
Power |
0.05 K |
70 kW |
-5.0 MW/K |
700 mK/nW |
200 kW |
63.2 µV |
316 pA |
7 fW |
0.1 K |
19.3 kW |
-266 kW/K |
800 mK/nW |
20 kW |
63.2 µV |
3.16 nA |
193 fW |
0.3 K |
5.6 kW |
-16.6 kW/k |
50 mK/nW |
6.32 kW |
200 µV |
31.6 nA |
5.6 fW |
1 K |
2.3 kW |
-1.2 kW/k |
8 mK/nW |
6.32 kW |
200 µV |
31.6 nA |
2.3 pW |
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| Instrument Performance |
Overall performance |
Temperature |
Measurement
resolution |
Electronic
accuracy |
Calibration
accuracy |
Self-heating
errors |
Interpolation
error |
Overall
accuracy |
0.05 K |
40 W (8 µK) |
35 W (7 µK) |
±5 mK |
49 µK |
±0.2 mK |
±5.2 mK |
0.1 K |
1 W (3.8 µK) |
9.7 W (36 µK) |
±5 mK |
155 µK |
±0.2 mK |
±5.2 mK |
0.3 K |
0.1 W (6 µK) |
2.8 W (170 µK) |
±5 mK |
280 µK |
±0.2 mK |
±5.4 mK |
1 K |
0.1 W (83 µK) |
0.7 W (580 µK) |
±5 mK |
18 µK |
±0.2 mK |
±5.8 mK |
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| NOTES: |
- Recommended operating range of GA-200A-30 is 50 mK to 1 K, but it can be used beyond this range
- Excitation chosen to minimize sensor self-heating
- Typical thermal resistance with minimal heat sinking; can be improved with permanent installation
- Typical sensor characteristics; individual sensors vary in resistance and sensitivity
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The Lake Shore
GR-200A-30
germanium RTD is the best choice for high accuracy and sensitivity from 0.05 K to 1 K with the Model 370 AC resistance bridge. |
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Excitation Power = Actual Current2 × Measured Resistance
Resolution (Temperature) = Resolution (Resistance) / dR/dT
Electronic Accuracy (Temperature) = Electronic Accuracy (Resistance) / dR/dT
Self-Heating = Excitation Power × Thermal Resistance
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| 370/3716 Performance Specification Table |
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63.2 kW |
— resistance range |
600 mW |
— resolution |
3.2 pW |
— power |
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| Resistance range: Full scale resistance range, nominal 20% over range |
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| Resolution: RMS noise with 18 s filter settling time (approximates 3 s analog time constant) |
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| Power: Excitation power at one-half full scale resistance |
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Precision: Dominated by measurement temperature coefficient (±0.0015% of reading ±0.0002% of range)/°C |
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Voltage Range |
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632 mV |
200 mV |
63.2 mV |
20 mV |
6.32 mV |
2.0 mV |
632 µV |
200 µV |
63.2 µV |
20 µV |
6.32 µV |
2.0 µV |
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20 W |
6.32 W |
2.0 W |
632 mW |
200 mW |
63.2 mW |
20 mW |
6.32 mW |
2.0 mW |
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20 µW |
6.0 µW |
2.0 µW |
1.3 µW |
400 nW |
130 nW |
100 nW |
100 nW |
100 nW |
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10 mW |
3.2 mW |
1.0 mW |
320 µW |
100 µW |
32 µW |
10 µW |
3.2 µW |
1.0 µW |
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10 mA |
63.2 W |
20 W |
6.32 W |
2.0 W |
632 mW |
200 mW |
63.2 mW |
20 mW |
6.32 mW |
2.0 mW |
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60 µW |
20 µW |
6.0 µW |
4.0 µW |
1.3 µW |
400 nW |
300 nW |
300 nW |
300 nW |
300 nW |
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3.2 mW |
1.0 mW |
320 µW |
100 µW |
32 µW |
10 µW |
3.2 µW |
1 µW |
320 nW |
100 nW |
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3.16 mA |
200 W |
63.2 W |
20 W |
6.32 W |
2.0 W |
632 mW |
200 mW |
63.2 mW |
20 mW |
6.32 mW |
2.0 mW |
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200 µW |
60 µW |
20 µW |
13 µW |
4.0 µW |
1.3 µW |
1.0 µW |
1.0 µW |
1.0 µW |
1.0 µW |
1.0 µW |
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1 mW |
320 µW |
100 µW |
32 µW |
10 µW |
3.2 µW |
1.0 µW |
320 nW |
100 nW |
32 nW |
10 nW |
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1.0 mA |
632 W |
200 W |
63.2 W |
20 W |
6.32 W |
2.0 W |
632 mW |
200 mW |
63.2 mW |
20 mW |
6.32 mW |
2.0 mW |
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600 µW |
200 µW |
60 µW |
40 µW |
13 µW |
4.0 µW |
3.0 µW |
3.0 µW |
3.0 µW |
3.0 µW |
3.0 µW |
3.0 µW |
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320 µW |
100 µW |
32 µW |
10 µW |
3.2 µW |
1.0 µW |
320 nW |
100 nW |
32 nW |
10 nW |
3.2 nW |
1.0 nW |
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316 µA |
2.0 kW |
632 W |
200 W |
63.2 W |
20 W |
6.32 W |
2.0 W |
632 mW |
200 mW |
63.2 mW |
20 mW |
6.32 mW |
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2.0 mW |
600 µW |
200 µW |
130 µW |
40 µW |
13 µW |
10 µW |
10 µW |
10 µW |
10 µW |
10 µW |
10 µW |
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100 µW |
32 µW |
10 µW |
3.2 µW |
1.0 µW |
320 nW |
100 nW |
32 nW |
10 nW |
3.2 nW |
1.0 nW |
320 pW |
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100 µA |
6.32 kW |
2.0 kW |
632 W |
200 W |
63.2 W |
20 W |
6.32 W |
2.0 W |
632 mW |
200 mW |
63.2 mW |
20 mW |
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6.0 mW |
2.0 mW |
600 µW |
400 µW |
130 µW |
40 µW |
30 µW |
30 µW |
30 µW |
30 µW |
30 µW |
30 µW |
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32 µW |
10 µW |
3.2 µW |
1.0 µW |
320 nW |
100 nW |
32 nW |
10 nW |
3.2 nW |
1.0 nW |
320 pW |
100 pW |
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31.6 µA |
20 kW |
6.32 kW |
2.0 kW |
632 W |
200 W |
63.2 W |
20 W |
6.32 W |
2.0 W |
632 mW |
200 mW |
63.2 mW |
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20 mW |
6.0 mW |
2.0 mW |
1.3 mW |
400 µW |
130 µW |
100 µW |
100 µW |
100 µW |
100 µW |
100 µW |
100 µW |
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