Ruthenium Oxide - Rox RTDs - Technical Specifications - Lake Shore Cryotronics, Inc.

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Ruthenium Oxide (Rox™) RTDs

Specifications

Standard curve¹ 102 and 202: 0.05 K to 40 K; 103: 1.4 K to 40 K

Recommended excitation² RX-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 – Click here for more information

Magnetic field Recommended – Click here for more information

Reproducibility⁴ ±15 mK

¹ 102B does not follow a standard curve

² Recommended 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

³ 102B not recommended for use in magnetic fields

⁴ Short-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 K	40 K
RX-102B-CB	0.01 K⁵	40 K
RX-202A-AA	0.05 K	40 K
RX-103A-AA	1.4 K	40 K

⁵ Calibrations down to 20 mK available; 10 mK calibrations coming soon

Calibrated Accuracy⁶

	RX- 102A-AA	RX- 102B-CB	RX- 202A-AA	RX- 103A-AA
20 mK	—	±2 mK	—	—
50 mK	—	±4 mK	—	—
1.4 K	±16 mK	±16 mK	±16 mK	±16 mK
4.2 K	±16 mK	±16 mK	±16 mK	±17 mK
10 K	±18 mK	±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-AA	RX- 102B-CB	RX- 202A-AA	RX- 103A-AA
4.2 K	±30 mK	±30 mK	±50 mK	±15 mK


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

Typical Magnetic Field-Dependent Temperature Errors ΔT/T (%) at B (magnetic induction)

Rox™ 102A
T(K)	2.5 T	8 T	14 T	19 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™ 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

Rox™ 202A
T(K)	2.5 T	8 T	14 T	19 T
2	-0.13	-2.2	-3.9	-5.2
3	0.18	-0.68	-2.7	-3.7
4	0.77	0.046	-1.8	-3.2
8	-0.023	0.16	-0.65	-3.0
16	0.03	0.16	-0.48	-1.5
23	-0.05	-0.08	-0.39	-0.92

Rox™ 103A
T(K)	2.5 T	8 T	14 T	19 T
2	0.58	1.5	2.2	2.6
3	0.44	1.1	1.7	2.0
4	0.27	0.95	1.4	1.7
8	0.11	0.49	0.71	0.80
16	0.018	0.076	0.089	0.040
23	0.0051	0.0058	-0.0060	-0.095

Temperature Response Data Table (typical)
	102A			102B			202A			103A
	R(W)	dR/dT (W/K)	(T/R)· (dR/dT)	R(W)	dR/dT (W/K)	(T/R)· (dR/dT)	R(W)	dR/dT (W/K)	(T/R)· (dR/dT)	R(W)	dR/dT (W/K)	(T/R)· (dR/dT)
0.01 K	—	—	—	9856.38	-413888	-0.4199	—	—	—	—	—	—
0.02 K	—	—	—	7289.79	-170565	-0.4680	—	—		—	—	—
0.05 K	70020	-5090000	-3.6	4676.87	-41480	-0.4435	110000	-12300000	-5.6	—	—	—
0.1 K	19390	-266000	-1.4	3548.94	-12578	-0.3544	23340	-274000	-1.2	—	—	—
0.3 K	5615	-16600	-0.89	2502.26	-2365	-0.2836	8364	-19400	-0.69	—	—	—
1.4 K	2005	-667	-0.47	1779.33	-197.7	-0.1555	3797	-935	-0.34	30750	-13570	-0.62
4.2 K	1370	-80.3	-0.25	1546.44	-40.04	-0.1087	2918	-121	-0.17	18150	-1560	-0.36
10 K	1167	-15.3	-0.13	1410.19	-15.43	-0.1094	2579	-31.6	-0.12	14060	-315	-0.22
40 K	1049	-1.06	-0.04	1198.80	-3.411	-0.1138	2244	-4.58	-0.08	11150	-21.7	-0.08
Click here for expanded response table

Magnetic Field Dependance Data for Sample Rox™ RTDs

Rox

Rox

Rox


Physical Specifications
	Mass	Lead type	Internal atmosphere	Sensor materials
RX-102A-AA	3.3 g	2 copper with heavy build Formvar^® attached with epoxy strain relief at sensor - user should branch to 4 (no polarity)	Air	Thick ruthenium dioxide and bismuth ruthenate films with palladium silver contacts, indium solder, aluminium oxide substrate, sapphire header and copper canister with epoxy seal
RX-202A-AA	3.28 g
RX-103A-AA	3.36 g
RX-102B-CB	3.5 g	Two 6 in 36 AWG copper leads with heavy build polyimide insulation	NA	Thick ruthenium dioxide and bismuth ruthenate films on aluminium dioxide substrate with palladium silver contacts; epoxy attachment to OFHC adapter; copper leads indium soldered to chip and heat sunk to copper adapter using VGE 7031 varnish

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-BR	1.40 mm (0.070 in)	0.21 mm (0.010 in)	1.23 mm (0.060 in)	0.41 mm (0.016 in)

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