Product description
Sensors are designed for routine cryogenic temperature measurements, especially in the presence of high magnetic fields what is possible due to their low magnetic field error. Their main advantage is high sensitivity in temperatures below 100 K.
The sensors are calibrated by the comparative method which is based on measuring voltages of the sensor under calibration and the reference germanium thermometer. All measurements are computer-controlled and made using the four-wire sensing technique to eliminate the effects of the resistance of wires.
Each sensor is provided with calibration certificate complying with the EA MLA agreement in the field of calibration what ensures traceability of its measurement results to the International System of Units (SI).
Uncertainties of measurements included in calibration certificates have been evaluated in compliance with EA-4/02 M:2013. What distinguishes our product is the innovative measurement method, which allows to collect the temperature characteristic of sensors throughout the whole calibration range, giving a resolution of less than 5 mK.
Typical resistance at 4.2 K is 3000 Ω and at room temperature about 900 Ω.
It is possible to produce the sensor housings according to customer's requirements or design.
Advantages:
- High long-term calibration stability
- High sensitivity of measurements (> 400 Ω / K)
- Fast response time of about 1ms at 4.2 K
- Minimal influence of magnetic field and radiation on measurement
- Wide measuring range from 3.8 K to 300 K
Parameters:
| Operating range |
3.8 K - 300 K |
|---|---|
| Thermal |
About 1ms |
| Resistance in room temperature |
850 Ω - 1000 Ω |
|
Resistance 3.8 K |
2800 Ω - 4500 Ω |
|
Stability |
<0.5%/10 years |
|
Dimensions |
1.3 mm x 2.5 mm x 8 mm |
Influence of the presence of magnetic field on the measurement
|
Temperature, K |
Magnetic induction, T |
Measurement accuracy ΔT/T, % |
|---|---|---|
|
4.2 |
2 |
0.4-1 |
|
3 |
0.8-2 |
|
|
6 |
2.8-6.4 |
commercial offer (PDF)