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Interchangable Rox™ Specifications

General

Standard curve 102 and 202: 0.05 K to 40 K; 103: 1.4 K to 40 K

Recommended excitation1RX-102 and RX-202 : 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. RX-103: 10 mV or less for T > 1 K.

Dissipation at recommended excitation
102 and 202: 7.5 × 10–8 W at 4.2 K;
103: 3.2 × 10–9 W at 1.4 K, 5.5 × 10–9 W at 4.2 K, 9.6 × 10–9 W at 77 K

Thermal response time 0.5 s at 4.2 K, 2.5 s at 77 K

Radiation effects Recommended — more information

Magnetic field Recommended — more information

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-102A-AA 0.05 K40 K
RX-202A-AA 0.05 K40 K
RX-103A-AA 1.4 K40 K

Calibrated accuracy3

 RX-102A-AARX-202A-AARX-103A-AA
20 mK
50 mK
1.4 K ±16 mK ±16 mK±16 mK
4.2 K±16 mK±16 mK±17 mK
10 K±18  mK±18 mK±22 mK

3[(Calibration uncertainty)2 + (reproducibility)2] 0.5 for more information see Appendices B, D, and E

Long-term stability

 RX-102A-AARX-202A-AARX-103A-AA
4.2 K±30 mK±50 mK±15 mK

Typical magnetic field-dependent temperature errors ΔT/T (%) at B (magnetic induction)

Rox™ 102A
T (K)2.5 T 8 T14 T19 T
2-1.4-7.9-13-17
3-1.5-7-14-18
4-0.56-6.7-14-18
8-1.3-6.1-13-21
16-0.40-3.4-9.6-16
23-0.31-2.2-6.2-11


Rox™ 202A
T (K)2.5 T 8 T14 T19 T
2-0.13-2.2-3.9-5.2
30.18-0.68-2.7-3.7
40.770.046-1.8-3.2
8-0.0230.16-0.65-3.0
160.030.16-0.48-1.5
23-0.05-0.08-0.39-0.92


Rox™ 103A
T (K)2.5 T 8 T14 T19 T
20.581.52.22.6
30.441.11.72.0
40.270.951.41.7
80.110.490.710.80
160.0180.0760.0890.040
230.00510.0058-0.0060-0.095

Accuracy: interchangeability

 RX-102A-AA-M, matched RX-102A-AA, unmatched RX-202A-AA-M, matched RX-202A-AA, unmatched RX-103A-AA-M, matched RX-103A-AA, unmatched
0.05 K ±5 mK±10 mK±10 mK±15 mK
0.3 K±15 mK±20 mK±20 mK±25 mK
0.5 K±20 mK±25 mK±25 mK±30 mK
1.4 K±25 mK±50 mK±50 mK±100 mK±50 mK±150 mK
4.2 K±75 mK±125 mK±150 mK±250 mK±100 mK±400 mK
20 K±500 mK±1.25 K±1 K±2.5 K±700 mK±2 K
40 K±1.5 K±4 K±2 K±5 K±1.5 K±4 K


Temperature response data table (typical)

 102A202A103A
 R(Ω)dR/dT
(Ω/K)
(T/R)·
(dR/dT)
R(Ω)dR/dT
(Ω/K)
(T/R)·
(dR/dT)
R(Ω)dR/dT
(Ω/K)
(T/R)·
(dR/dT)
0.05 K63765-2888654-2.2769191-3186379-2.3
0.1 K19400-266199-1.3721927-256913-1.17
0.3 K 5615-16647-0.898079-18420-0.68
1.4 K 2005-667-0.473820-879-0.3230745-13571-0.62
4.2 K 1370-80.4-0.252929-124-0.1818149-1559-0.36
10 K 1167-15.2-0.132582-31.6-0.1214083-337-0.24
20 K 1089-3.96-0.072389-12.1-0.1012289-102-0.17
40 K 1049-1.03-0.042243-4.6-0.0811137-33-0.12

Expanded response table

Physical specifications

 MassLead typeInternal atmosphereSensor materials
RX-102A-AA3.3 g2 copper with heavy build Formvar® attached with epoxy strain relief at sensor — user should branch to 4 (no polarity)AirThick ruthenium dioxide and bismuth ruthenate films with palladium silver contacts, indium solder, aluminum oxide substrate, sapphire header and copper canister with epoxy seal
RX-202A-AA3.28 g
RX-103A-AA3.36 g
Bare chip A (chip length)B (pad width)C (chip width)D (thickness)Materials used
RX-102A-BR
1.45 mm (0.057 in)0.30 mm (0.012 in)1.27 mm (0.050 in)0.65 mm (0.022 in)Thick ruthenium dioxide and bismuth ruthenate films with palladium silver contacts
RX-103A-BR1.40 mm (0.070 in)0.21 mm (0.010 in)1.23 mm (0.060 in)0.41 mm (0.016 in)

Rox™ calibration ranges

rox-calibrations

Magnetic field dependence data for sample Rox™ RTDs

RX-102A magnetic field dependence
RX-103A magnetic field dependence
RX-202A magnetic field dependence
Rox AA package
Rox BR package