Cryogenic Temperature Sensors
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Cryogenic Temperature Sensors
A CRYOGENIC WORKHORSE
Scientific Instruments recommends the Si540 silicon diodes for most all cryogenic applications — unless there is a magnetic field present. For applications where magnetic fields are present and interchangeability is a factor, such as MRI devices and instrumentation for proton therapy, Scientific Instruments recommends using the Ruthenium oxide, RO600. In specialized environments where there is increased exposure to magnetic fields and radiation like those in quantum computing or fusion reactors, we recommend our Thin Film RTD, Zirnox.
Product Specifications :
| Weight | 1 lbs |
|---|---|
| Dimensions | 6 × 6 × 3 in |
| Physical Size | • Gold plated OFHC copper enclosure, Dia. .093″ (2.4mm) x Length .200″ (5.1mm) • Phosphor-bronze lead wire-standard, 4-Leaded, Polyimide coated, 36 AWG, Custom Leads Available |
| Performance in Magnetic Fields | Figure 2 shows the remarkable performance of the RO-600 in high magnetic fields. With a temperature error of less than +-1.6%, a simple linear formula allows correction of any apparent temperature, measured in a field up to 16 Tesla, to the actual temperature. This result may extend to higher fields, and is useful for a broad temperature range down to 36mK. It is independent of the orientation of the sensor in the magnetic field. Since errors in temperature of uncalibrated thermometers, in any magnetic field up to 16 Tesla, accumulate to only a few percent, the RO-600 is exceedingly useful in most low temperature applications, and is versatile enough to use in most low temperature environments. |
| Interchangeability | Besides being remarkable repetitive on successive cooldowns, RO-600 series exhibit uniform response within groups. Figure 3 shows a typical R vs T curve for Grouping Sensors. Resistance variation at a given temperature is less than 1% for temperatures above 70mK. |
| Sensitivity | Figure 4 represents the sensitivity of a typical RO-600. This sensitivity is a smooth and monotonic increase at lower temperatures. *All data collected and analyzed by G.G. Ihas, L. Frederick, and J.P. McFarland, J. Low Temp. Phy. 113, 963 (1998). |
| RO-600 Available Models | Uncalibrated Accuracy for Group A +/- 0.01K @ .050K+/- 0.010K @ 0.050K +/- 0.10K @ 1.50K+/- 0.060K @ 1.50K +/- 0.20K @ 4.2K+/- 0.100K @ 4.20K +/- 1.00K @ 20K+/- 0.600K @ 20K |
| Calibration Ranges | E3= 0.020K to 20K * Data is subject to changes as a result of product improvement. |
| Calibration Accuracy | 0.050K to 0.15K = +/- 0.005K 0.150K to 1.50K = +/- 0.010K 1.500K to 4.2K = +/- 0.025K 4.200K to 20K = +/- 0.050K *Custom calibrations available, consult factory |
| Grouping | Uncal: +/- 0.3K from 2K to 50K, A: +/- 0.1K from 2K to 50K, +/- 0.75K from 50K to 100K, +/- 20K from 100K to 273K, B: +/- 0.2K from 2K to 50K, +/- 1K from 50K to 100K , +/- 20K from 100K to 273K, C: +/- 0.2K from 2K to 50K, +/- 1.5K from 50K to 100K, +/- 20K from 100K to 273K, D: +/- 0.3K from 2K to 50K, +/- 3K from 50K to 100K, +/- 20K from 100K to 273K, GG1: 2K to 4.2K, LL1: 4.2K to 273K |
| Mounting | 0.093″ Copper Canister, Model 22 Bobbin, Model 25 Bobbin |
| Lead Type | #36 AWG 4-Leaded Phosphor Bronze, #36 AWG 2-Leaded Phosphor Bronze, #32 AWG 4-Leaded Phosphor Bronze, #32 AWG 2-Leaded Phosphor Bronze |
| Lead Length | 24 Inches, 36 Inches, 48 Inches, 72 Inches |
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Weight | 1 lbs |
|---|---|
| Dimensions | 6 × 6 × 3 in |
| Model | ZR2 – 20 Ω, ZR4 – 40 Ω |
| Calibration | Uncal, NN: +/- 0.01K from 1.5K to 25K & +/- 0.03K from 25K to 100K & +/- 0.05K from 100K to 450K, E: +/- 0.005K from 0.02K to 0.15K, 0.01K from 0.15K to 1.5K, +/- 0.025K from 1.5K to 4.2K, +/- 0.05K from 4.2K to 450K |
| Mounting | Bare Chip, Exposed Substrate, 0.093″ Copper Canister, Model 22 Bobbin, Model 25 Bobbin |
| Lead Type | #36 AWG 4-Leaded Phosphor Bronze, #36 AWG 2-Leaded Phosphor Bronze, #32 AWG 4-Leaded Phosphor Bronze, #32 AWG 2-Leaded Phosphor Bronze |
| Lead Length | 24 Inches, 36 Inches, 48 Inches, 72 Inches |