S800 S800ds
User Manual: S800
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Cryogenic Control Systems, Inc.
S800
Silicon Diode Temperature Sensor
General Description
Cryo-Con Silicon Diode Sensors offer high sensitivity
over a wide temperature range. Close conformance to
a standard response curve ensures reliable and
repeatable measurements with a high degree of
interchangeability.
The S800 diode sensors use the industry standard
0.310” copper bobbin package.
Features
Accuracy: Available in four tolerance bands.
Interchangeability: Conforms to a standard
calibration curve with high accuracy.
Wide temperature range: 1.4K to 380K.
Extremely stable: Minimum long-term drift.
High Repeatability.
Specifications
Useful Temperature Range: 1.4K to 380K.
Standard Curve: Cryo-con S800.
Excitation Current: 10µA ±0.1%
Repeatability: 10mK @4.2K, 16mK @77K,
75mK @273K.
Magnetic Field Use: Not recommended for fields
above 0.1 Tesla or below 40K.
Use in Radiation: Not recommended for high
radiation environments.
Maximum Storage Temperature: 400K.
Recommended Connection: Four-wire for accuracy.
Maximum Reverse Voltage: 60V.
Maximum Excitation Current: 2mA.
S800 S800 Bobbin Package: The industry standard bobbin package
features excellent thermal contact to the diode junction. This ensures a
rapid thermal response and minimizes thermal gradients between the
sensing element and the sensor package. Mechanical integrity of the
sensor assures reliable performance even in severe applications.
Thermal integrity plus a single value excitation current (10µA) insure
against self-heating and current switching errors. With the bobbin
package, the lead wires are thermally anchored to the sensor mounting.
This is essential for accurate sensor readings.
Installation: Connection is made using a four-wire, 36 AWG cryogenic
ribbon cable. Wires may be separated by dipping in Isopropyl Alcohol
and then wiped clean. Lead insulation is difficult to strip. A mechanical
stripper or scrapping is recommended.
Mounting is done with a 4-40 machine screw. A thin layer of Apiezon® N
grease is recommended.
Cable Color Code
V+ Clear
V- Green
I+ Black
I- Red
Bobbin Package Specifications
Bobbin Material Gold plated Oxygen free hard Copper.
Marking Individual serial number.
Sensor Bonding Stycast epoxy.
Mass 1.1g excluding leads.
Leads 36 inches, 36AWG Phosphor-Bronze. Four-
lead color coded cryogenic ribbon cable.
Insulation is heavy Formvar® .
Mounting 4-40 machine screw.
Typical Performance Characteristics
Temperature Response Temperature Response Below 70K
Tolerance Bands
1.5K to 30K 30K to 100K 100K to 400K
Band AA* ±0.1K ±0.1K ±0.1K
Band A ±0.25K ±0.5K ±0.5K
Band B ±0.5K ±0.5K ±0.33% of
temp
Uncalibrated ±1.5K ±1.5K ±1.5K
*Each sensor provided with an individual calibration curve.
Typical Temperature Response
Ordering Information
Silicon Diode Sensor, Bobbin Package.
S800-AA Tolerance Band AA
S800-A Tolerance Band A.
S800-B Tolerance Band B.
S800 Uncalibrated.
Cryogenic Control Systems, Inc.
Cryogenic Control Systems, Inc.
PO Box 7012
Rancho Santa Fe, CA 92067
Tel: (858) 756-3900
Fax: (858) 759-3515
e-mail: sales@cryocon.com
Web: www.cryocon.com
Specifications subject to change without notice.
© Cryogenic Control Systems, Inc. 2007,S800a
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0 50 100 150 200 250 300 350 400
Temperature (K)
Sensitivity (mV/K)
T(K) V S(V/K)
1.5 1.866 -19.5
4.20 1.809 -21.90
50.00 1.071 -1.64
77.35 1.023 -1.94
100 0.979 -1.82
273 0.623 -2.29
380 0.380 -2.37
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0 50 100 150 200 250 300 350 400
Temperature (K)
Volts
