Ultra-Low Temperature Rox™ Specifications
General
Recommended excitation1: 20 µV (0.05 K to 0.1 K); 63 µV (0.1 K to 1.2 K); 10 mV or less for T > 1 K
Dissipation at recommended excitation: 7.5 × 10–8 W at 4.2 K
Thermal response time: 0.5 s at 4.2 K, 2.5 s at 77 K
Radiation effects: Recommended — more information
Magnetic field: Not recommended
Reproducibility2: ±15 mK
Soldering standard: J-STD-001 Class 2
1Recommended excitation for T < 1 K based on Lake Shore calibration procedures using an AC resistance bridge — for more information refer to Appendix D and Appendix E
2Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks from 305 K to 4.2 K
Range of use
| | Minimum limit | Maximum limit |
| RX-102B-RS | 0.005 K3 | 40 K |
| RX-102B-CB (discontinued) | 0.01 K4 | 40 K |
3Calibrations down to 10 mK available
4Calibrations down to 20 mK available
Calibrated accuracy5
| | RX-102B-RS | RX-102B-CB (discontinued) |
| 5 mK | ±1.2 mK6 | — |
| 7 mK | ±0.8 mK6 | — |
| 10 mK | ±1 mK | ±1 mK6 |
| 20 mK | ±2 mK | ±2 mK |
| 50 mK | ±4 mK | ±4 mK |
| 1.4 K | ±16 mK | ±16 mK |
| 4.2 K | ±16 mK | ±16 mK |
| 10 K | ±18 mK | ±18 mK |
5[(Calibration uncertainty)2 + (reproducibility)2] 0.5 for more information see Appendices B, D, and E
6Extrapolated accuracy values are anticipated
Long-term stability
| | RX-102B-RS | RX-102B-CB (discontinued) |
| 4.2 K | ±30 mK | ±30 mK |
Physical specifications
| | Mass | Lead type | Mounting hole diameter | Sensor materials |
| RX-102B-RS | 3.5 g | Two 36 AWG copper leads with heavy build polyimide insulation, 15 cm length | Accommodates a #6-32 or M3 screw | Thick ruthenium dioxide and bismuth ruthenate films on aluminum dioxide substrate with palladium silver contacts; epoxy attachment to OFHC adapter; copper leads indium soldered to chip and heat sunk to copper adapter using varnish, covered with copper radiation shield |
| RX-102B-CB | 3.5 g | Two 6 in 36 AWG copper leads with heavy build polyimide insulation | Accommodates a #6-32 or M3 screw | Thick ruthenium dioxide and bismuth ruthenate films on aluminum dioxide substrate with palladium silver contacts; epoxy attachment to OFHC adapter; copper leads indium soldered to chip and heat sunk to copper adapter using varnish |
Typical magnetic field-dependent temperature errors ΔT/T (%) at B (magnetic induction)
| Rox™ 102B |
| T (K) | 2.5 T | 8 T | 14 T | 19 T |
| 2 | 3.29 | 13.82 | 22.53 | 27.95 |
| 3 | 3.96 | 14.68 | 23.12 | 29.12 |
| 4 | 3.53 | 13.92 | 22.57 | 28.20 |
| 8 | 1.53 | 7.53 | 13.50 | 17.86 |
| 16 | 0.27 | 2.14 | 4.66 | 6.58 |
| 23 | 0.06 | 0.79 | 2.01 | 3.11 |
Magnetic field dependence data for sample Rox™ RTDs
