Omega Products CY7-BO2 User Manual

The CY7 Series sensors from OMEGA represent the first truly new cryogenic sensor technology introduced in the last decade. The sensors incorporate uniform sensing elements that exhibit precise, repeatable, monotonic temperature response over a wide range. The elements are mounted into rugged, hermetically sealed packages that have been specifically designed for proper behavior in a cryogenic environment.The result is a family of sensors with temperature responses so predictable, tightly

CY7-SD7, $140, shown

larger than actual size

T-3

Average Slope

-2.3mV/K

Average Slope

-26mV/K

1.8

1.6

1. 4

1.2

1.0

0.8

0.6

0.4

0.2

0.0 0

40 60

100

200

300

400

Temperature, K (Kelvin)

Standard Temperature Response (Curve 10) for CY7 Series Sensors.

All Sensors Track this Curve Within Specified Tolerance Bands.

Forward Voltage –– V

(Volts)

40 50

Cryogenic Temperature Sensors

Silicon Diodes

Covered by U.S. and

International patents and

pending applications

PATENTED

grouped, and stable that the sensors can be routinely interchanged with one another.

A New Silicon Diode Chip

The key to the sensor’s temperature response lies with the basic sensing element itself. The small silicon chip in each sensor has a temperature characteristic that is so stable, so predictable, and conforms so well from chip to chip, that the CY7’s sensors are the first mass produced, interchangeable cryogenic sensors.

A Sensor Package Designed for Cryogenics

Sensors for higher temperatures fall far short for cryogenic use. The complex thermal link between the

sensing element and its entire environment must be taken into account, as does the effect of any measurement induced selfheating of the sensor itself, to achieve accurate results. In addition, the package must also withstand repeated cycling to low temperatures without mechanical failure.

CY7 Series

Starts at

140

Standard Curve #10 for CY7 Silicon Diodes

Measurement Current = 10µA ±0.05%

T Voltage dV/dT T Voltage dV/dT T Voltage dV/dT

(K) (mV/K) (K) (mV/K) (K) (mV/K)

1.40 1.69812 -13.1 16.0 1.28527 -18.6 95.0 0.98564 -2.02

1.60 1.69521 -15.9 16.5 1.27607 -18.2 100. 0.97550 -2.04

1.80 1.69177 -18.4 17.0 1.26702 -18.0 110. 0.95487 -2.08

2.00 1.68786 -20.7 17.5 1.25810 -17.7 120. 0.93383 -2.12

2.20 1.68352 -22.7 18.0 1.24928 -17.6 130. 0.91243 -2.16

2.40 1.67880 -24.4 18.5 1.24053 -17.4 140. 0.89072 -2.19

2.60 1.67376 -25.9 19.0 1.23184 -17.4 150. 0.86873 -2.21

2.80 1.66845 -27.1 19.5 1.22314 -17.4 160. 0.84650 -2.24

3.00 1.66292 -28.1 20.0 1.21440 -17.6 170. 0.82404 -2.26

3.20 1.65721 -29.0 21.0 1.19645 -18.5 180. 0.80138 -2.28

3.40 1.65134 -29.8 22.0 1.17705 -20.6 190. 0.77855 -2.29

3.60 1.64529 -30.7 23.0 1.15558 -21.7 200. 0.75554 -2.31

3.80 1.63905 -31.6 24.0 1.13598 -15.9 210. 0.73238 -2.32

4.00 1.63263 -32.7 25.0 1.12463 -7.72 220. 0.70908 -2.34

4.20 1.62602 -33.6 26.0 1.11896 -4.34 230. 0.68564 -2.35

4.40 1.61920 -34.6 27.0 1.11517 -3.34 240. 0.66208 -2.36

4.60 1.61220 -35.4 28.0 1.11212 -2.82 250. 0.63841 -2.37

4.80 1.60506 -36.0 29.0 1.10945 -2.53 260. 0.61465 -2.38

5.00 1.59782 -36.5 30.0 1.10702 -2.34 270. 0.59080 -2.39

5.50 1.57928 -37.6 32.0 1.10263 -2.08 280. 0.56690 -2.39

6.00 1.56027 -38.4 34.0 1.09864 -1.92 290. 0.54294 -2.40

6.50 1.54097 -38.7 36.0 1.09490 -1.83 300. 0.51892 -2.40

7.00 1.52166 -38.4 38.0 1.09131 -1.77 310. 0.49484 -2.41

7.50 1.50272 -37.3 40.0 1.08781 -1.74 320. 0.47069 -2.42

8.00 1.48443 -35.8 42.0 1.08436 -1.72 330. 0.44647 -2.42

8.50 1.46700 -34.0 44.0 1.08093 -1.72 340. 0.42221 -2.43

9.00 1.45048 -32.1 46.0 1.07748 -1.73 350. 0.39783 -2.44

9.50 1.43488 -30.3 48.0 1.07402 -1.74 360. 0.37337 -2.45

10.0 1.42013 -28.7 50.0 1.07053 -1.75 370. 0.34881 -2.46

10.5 1.40615 -27.2 52.0 1.06700 -1.77 380. 0.32416 -2.47

11.0 1.39287 -25.9 54.0 1.06346 -1.78 390. 0.29941 -2.48

11.5 1.38021 -24.8 56.0 1.05988 -1.79 400. 0.27456 -2.49

12.0 1.36809 -23.7 58.0 1.05629 -1.80 410. 0.24963 -2.50

12.5 1.35647 -22.8 60.0 1.05267 -1.81 420. 0.22463 -2.50

13.0 1.34530 -21.9 65.0 1.04353 -1.84 430. 0.19961 -2.50

13.5 1.33453 -21.2 70.0 1.03425 -1.87 440. 0.17464 -2.49

14.0 1.32412 -20.5 75.0 1.02482 -1.91 450. 0.14985 -2.46

14.5 1.31403 -19.9 80.0 1.01525 -1.93 460. 0.12547 -2.41

15.0 1.30422 -19.4 85.0 1.00552 -1.96 470. 0.10191 -2.30

15.5 1.29464 -18.9 90.0 0.99565 -1.99 475. 0.09062 -2.22

Cryogenic Temperature Sensors

Temperature

Model No. Price Description Range OB-CY20-2 $235 Low temperature epoxy for mounting sensor, twenty 2 g packets

(approx. 0.1 oz. each)

CYIF 140 5 pieces of Indium foil, high thermal conductivity, highly malleable,

used as a mechanical alternative to CYAG grease to mount a sensor. [0.127 mm thick x 50 x 50 mm square (0.005 thick x 2 x 2")]

CYAV 115 Adhesive varnish for tacking sensor extension leads [1 pt can (0.6 liter)] CYCO 360 Clamps with springs for CY7-CO sensors (package of 10) CYAG 335 General purpose thermal grease, used between sensor

1.4 to 316 K

and surface [25 g tube (approx. 1 oz)]

1.4 K to

330 K

Accessories For Mounting CY7 Series Silicon Diode Sensors

T-4