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 Cryogenic Temperature Sensor Packages and Mounting Adapters
 

Cryogenic temperature sensors are available in a variety of packages to facilitate mounting. Included are adapters that allow the sensor to be soldered in place, screwed on, bolted down, inserted into a hole, or inserted through a pressure seal in the form of a thermowell. Gold-plated copper bobbins are available for both diodes and resistors in order to heat sink leads. The chart below summarizes the standard Lake Shore sensor and packaging configurations. Appendix C: Sensor Packaging and Installation discusses techniques for the correct installation of cryogenic temperature sensors. More specific installation notes are included for the bare chip sensors, the SD package, and the CU, DI, CY, and CD adapters. Special packaging is also available – consult Lake Shore for custom orders.

 
 
Packaging
(see individual sensor pages for additional details)
Lake Shore Sensors
Installation
Instructions
   
Rhodium
Iron
Silicon Diode
Platinum
Common
Bare Chip Sensors

BC    Bare chip with 2 copper leads (42 AWG) 		           

           

 
BG   Bare chip with 2 or 4 gold leads
BR   Bare chip, no leads            
   
     
 
Hermetically Sealed Package

SD   		    





               
Mounting Adapters for SD

CO    Clamp		    





               
ET     Screw-in    
               
MT    Screw-in (metric)    
               
CU    Copper bobbin (small, 4-lead)    
               
DI    Copper bobbin (small, 2-lead)    
               
CY    Copper bobbin (large, 2-lead)    
               
LR    Half-rounded cylinder    
               
BO    Beryllium oxide heat sink block    
bullet
                
Platinum Mounting Adapters

AL
                    
Selection
        
AM                    
Selection
      
Copper Canister Package

AA
           





 
B            
 
CD    Copper bobbin            
 
Unique Packages
See individual sensor specifications
 
Packages
 
Cernox
Cernox™ Packages
Silicon Diode Packages
Germanium, Rox™, Rhodium-Iron, and Carbon-Glass Packages
(Rox™, Rhodium-Iron, and Carbon-Glass -AA and -CD only)
Platinum Packages
Capacitance Packages
GaAlAs Packages
Unique Packages
see individual sensor pages
   
TG-120-P DT-421-HR
TG-120-PL DT-670E-BR
PT-102 CX-10XX-BC
PT-103 CX-10XX-BG
PT-111 CX-10XX-BR
DT-414 RX-102B-CB
   
 
Individual Package Information
 
Hermetically Sealed SD Package
 
Click to Enlarge
 
  • Small package designed primarily for bonding or clamping to a flat surface
  • Indium, silver epoxy, 2850 Stycast® epoxy, or a CO clamp may be used for mounting
Package material: Sapphire base with alumina body and lid. Molybdenum/manganese metallization on base and lid top with nickel and gold plating. Gold tin solder as hermetic lid seal.
Leads: 2
Lead material:

Silicon diode: brazed Kovar
Cernox™: gold-plated copper soldered with 60/40 SnPb
Gallium Aluminum Arsenide: welded platinum

Mass: 0.03 g
Limitation: The useful upper temperature limit of this configuration is
500 K
The Lake Shore SD Package - the Most Rugged, Versatile Package in the Industry
The SD package, with its sapphire base, direct sensor-to-sapphire mounting, hermetic sealing, and brazed Kovar leads provides the industry's most rugged, versatile sensors with the best thermal connection between the sample and sensor chip. In addition, this package is designed so heat coming down the leads bypasses the sensor chip. It can survive several thousand hours at 500 K and is compatible with most ultra high vacuum applications, and can be indium soldered to samples.
The Lake Shore SD package is now available with Cernox™ resistors and GaAlAs diodes, as well as silicon diodes. For the Cernox™ resistors and GaAlAs diodes, the Kovar leads are replaced with nonmagnetic leads.
 
Mounting Adapters for SD Package - CO, CU, DI, CY, LR, BO, ET, MT
Click to Enlarge
  • Spring-loaded clamp holds standard SD sensor in contact with the surface of the sample and allows the sensor to be easily changed or replaced
  • Extra clamps are available for frequent relocation of the sensor
  • 4-40 stainless steel screw has a formed shoulder, thus applying correct pressure to the clamp
Package material: See SD package
Adapter material : Gold-plated copper (nickel strike)
Leads: See SD package
Lead material:

See SD package

Mass: 1.8 g (including SD package and clamp)
Limitation: The useful upper temperature limit of this configuration is
500 K
 
Click to Enlarge

Click here for CU cross section layout
CU
  • SD packaged sensor indium-soldered into a flat copper bobbin with the leads thermally anchored to that same bobbin
  • Can be mounted to any flat surface with a 4-40 screw
DI
  • 2-lead version of the CU
Package material: See SD package
Adapter material : Gold-plated copper bobbin (SD indium-soldered to adapter and wrapped in Stycast® epoxy)
CU Leads: Four 91 cm (36 in), 36 AWG, color-coded Quad-Lead™
DI Leads: 91 cm (36 in), 36 AWG, color-coded, 2-lead ribbon cable
Lead material:

Phosphor bronze alloy

Mass: 1.1 g (including SD package and bobbin, excluding leads)
Limitation: The epoxy limits the upper useful temperature of this configuration to 378 K (420 K with high temperature Cernox™ )
Click to Enlarge
  • Similar to the DI package, except the bobbin is larger in diameter with a centered mounting hole
  • Relatively large-sized, robust
Package material: See SD package
Adapter material : Gold-plated copper bobbin (SD indium-soldered to adapter and wrapped in Stycast® epoxy)
Leads: Two 91 cm (36 in), 30 AWG Teflon®-coated leads
Lead material:

Stranded copper

Mass: 4.3 g (Including SD package and bobbin, excluding leads)
Limitation: The epoxy limits the upper useful temperature of this configuration to 400 K
 
Click to Enlarge
  • With an SD packaged sensor mounted on a slightly-more-than half-rounded cylinder, this package is designed to be inserted into a 3.2 mm (1/8 in) diameter hole
Package material: See SD package
Adapter material : Gold-plated flat cylindrical copper disk (SD indium-soldered to adapter)
Leads: See SD package
Lead material:

See SD package
Mass: 0.2 g (Including SD package and disk)
Limitation: Indium solder limits the upper useful temperature of this configuration to 420 K
 
Click to Enlarge

  • SD package is soldered to a mounting block and the leads are thermally anchored (without epoxy) to the block via a beryllium oxide insert

  • Since leads can be a significant heat path to the sensing element and can lead to measurement errors when incorrectly anchored, this configuration helps maintain the leads at the same temperature as the sensor
Package material: See SD package
Adapter material : Gold-plated bolt-on copper block with leads thermally anchored to block (SD indium-soldered to adapter)
Leads: See SD package
Lead material:

See SD package
Mass: 1.5 g (including SD package and mounting block)
Limitation: Indium solder limits the upper useful temperature of this configuration to 420 K
 
Click to Enlarge
  • Convenient screw-in package formed by indium soldering a basic SD configuration into a recess in one flat of a hexagonal screw head
  • The head terminates in a standard SAE
    6-32 threaded stud allowing the sensor to be threaded into a mounting hole in the sample
Package material: See SD package
Adapter material : ET: Gold-plated copper SAE-threaded screw head #6-32
MT: Gold-plated copper metric threaded screw head 3 mm × 0.5 metric
Leads: See SD package
Lead material:

See SD package
Mass: 1.5 g (including SD package and screw-head)
Limitation: Indium solder limits the upper useful temperature of this configuration to 420 K
Click to Enlarge
  • The MT package is similar to the ET version except the SD package is mounted in a slot in the center of the hexagonal head and the stud is a 3 mm × 0.5 metric thread
Note: A light coating of vacuum grease on the threads further enhances the thermal contact between the sensor package and the sample.
 
 
 
Copper Canister Packages
Click to Enlarge
 
Click to Enlarge
  • Used with Cernox™, Carbon-Glass, Rhodium-Iron, Germanium, and Rox™ sensors
 
  • Used only with Germanium sensors

Adapter material : Gold-plated cylindrical copper canister, BeO header,
Stycast® epoxy
Leads: Four 32 AWG × 15 cm (6 in) long (Rox™: Two 32 AWG × 15 cm [6 in] long)
Lead material:

Phosphor bronze insulated with polyimide (Rox™: copper insulated with Formvar® )

Mass:

AA canister (empty): 0.091 g
B Canister (empty): 0.080 g

 

Once sensors are installed, total mass increases to 0.197 g to 0.416 g. Refer to individual sensor specifications.
Limitation: The epoxy limits the upper useful temperature of this configuration to 400 K
 
Mounting Adapter for AA Canister Package
Click to Enlarge
  • AA canister sensor soldered into a flat, copper bobbin with the sensor leads thermally anchored to the bobbin
  • Can be mounted to any flat surface with a 4-40 screw (not supplied)
  • Used with Cernox™, Carbon-Glass, Rhodium-Iron, Germanium, and Rox™ sensors
Adapter material : Copper bobbin, gold-plated (AA canister epoxied to bobbin with Stycast® epoxy)
Leads: 91 cm (36 in), 36 AWG, color-coded, Quad-Lead™
Lead material:

Phosphor bronze Grade A alloy

Limitation: The epoxy limits the upper useful temperature of this configuration to 378 K
Green bar
 
Mounting Adapters for Platinum RTDs
Spacer Spacer Spacer
PT-102-AL
PT-103-AM
  • PT-102 (AL) or PT-103 (AM) mounted into a flat aluminum block
  • Can be mounted to any flat surface with a 6-32 or M3 screw (not included) and Inconel® Belleville washer (included)
Adapter material : 6061 Al block (PT mounted to adapter using Cotronics Durabond® 950 Al-based adhesive)
AL leads: Two 0.010-inch diameter:
10.160 ±1.270 mm (0.400 ±0.050 in) long
AM leads: Two 0.010-inch diameter:
15.240 ±1.270 mm (0.600 ±0.050 in) long
Lead material:

Platinum

Mass: PT-102-AL: 3.8 g
PT-103-AM: 2.1 g
Limitation: The aluminum alloy limits the upper useful temperature of these configurations to 800 K
Sapcer Spacer
 
Adding Length to Sensor Leads
Adding extra wire to your sensor leads can be cumbersome and expensive. Lake Shore offers this service for you at the time you order your sensor. Following are the part numbers and lengths of wire available. A 4-wire configuration is recommended for resistors.
     
SMOD-L-YYZZ-X
SMOD Sensor modification
L

Number of leads

YY Wire type
ZZ Wire gauge
X Standard length of wire (ft):
1, 2, 4, 6, 8, 10, 15. Or as required
SMOD leads are attached with 60/40 SnPb solder. If sensor is to be used above 450 K, 90/10 PbSn solder must be specified. Formvar® insulation is limited to use below 378 K.
Click here for more information on sensor packages
 
 
DT duo-twist wire gauge = 32 or 36
MW

manganin wire

gauge = 30, 32 or 36
NM single starnd ph-br gauge = 32, 36 or 42
QL quad-lead gauge = 32 or 36
QT quad-twist gauge = 36 (32 guage not availble)
DL duo-lead gauge = 36
 
 2-wire configurations (L=2)
Typical lead configuration1
SMOD-2-DT32-(X) 2-lead, Duo-Twist™ wire, 32 AWG clear (+) green (–) attach color code tag in the box
SMOD-2-DT36-(X) 2-lead, Duo-Twist™ wire, 36 AWG clear (+) green (–) attach color code tag in the box
SMOD-2-MW30-(X) 2-lead, manganin wire, 30 AWG no color coding "+" lead marked with sticker
SMOD-2-MW32-(X) 2-lead, manganin wire, 32 AWG no color coding "+" lead marked with sticker
SMOD-2-MW36-(X) 2-lead, manganin wire, 36 AWG no color coding "+" lead marked with sticker
SMOD-2-NM32-(X) 2-lead, non-magnetic wire, 32 AWG no color coding "+" lead marked with sticker
SMOD-2-NM36-(X) 2-lead, non-magnetic wire, 36 AWG no color coding "+" lead marked with sticker
SMOD-2-NM42-(X) 2-lead, non-magnetic wire, 42 AWG no color coding "+" lead marked with sticker
Note: No tags needed for platinum (or other 2-lead resistor type) sensors)
 
 4-wire configurations (L=4)
SMOD-4-DT32-(X) 4-lead, Duo-Twist™ wire, 32 AWG clear (+) green (–) attach color code tag in the box
SMOD-4-DT36-(X) 4-lead, Duo-Twist™ wire, 36 AWG clear (+) green (–) attach color code tag in the box
SMOD-4-MW30-(X) 4-lead, manganin wire, 30 AWG no color coding "+" lead marked with sticker
SMOD-4-MW32-(X) 4-lead, manganin wire, 32 AWG no color coding "+" lead marked with sticker
SMOD-4-MW36-(X) 4-lead, manganin wire, 36 AWG no color coding "+" lead marked with sticker
SMOD-4-NM32-(X) 4-lead, non-magnetic wire, 32 AWG no color coding "+" lead marked with sticker
SMOD-4-NM36-(X) 4-lead, non-magnetic wire, 36 AWG no color coding "+" lead marked with sticker
SMOD-4-NM42-(X) 4-lead, non-magnetic wire, 42 AWG no color coding "+" lead marked with sticker
SMOD-4-QL32-(X) 4-lead, Quad-Lead ™ wire, 32 AWG red (l–), green (V–), clear (l+), blue (V+)2
SMOD-4-QL36-(X) 4-lead, Quad-Lead™ wire, 36 AWG red (l–), green (V–), clear (l+), blue (V+)2
SMOD-4-QT36-(X) 4-lead, Quad-Twist™ wire, 36 AWG pair: red (l–) and green (l+)2
pair: clear (V–) and green (V+)2
1 Subject to change - verify with document included with order
2 For QL-36, QL-32, and QT-36, attach appropriate color code tag in the sensor box
 
 Coaxial
SMOD-2-S1-(X) 2-lead, type S1 coaxial cable center cond. (+) and shield (–) "+" lead marked with sticker