Lake Shore Model 332 Temperature Controller User’s Manual
1.2 SENSOR SELECTION GUIDE
The Lake Shore Temperature Measurement and Control Catalog contains complete information on
selecting the appropriate Lake Shore Temperature Sensor for your application. A list of sensors that
may be used with the Model 332 is provided in Table 1-1. This paragraph provides a brief guideline
covering sensors commonly used with the Model 332. Typical performance specifications can be found
in Table 1-2. If a specific sensor model is not included in the table, use the sensitivity of the sensor at
the desired temperature to calculate temperature equivalence for your sensor.
Silicon Diodes are the best choice for general cryogenic use from 1.4 K to 500 K. Economical to use
because they follow a standard curve and are interchangeable in many applications, silicon diodes
are not suitable for use in ionizing radiation or magnetic fields.
GaAlAs Diodes offer high sensitivity from 1.4 K to above room temperature, with better sensitivity than
silicon diodes at temperatures below 25 K. They are useful in moderate magnetic fields. GaAlAs
diodes require calibration.
Platinum RTDs offer high uniform sensitivity from 30 K to over 800 K, with excellent reproducibility,
they are useful as a thermometry standard. They follow a standard curve above 70 K and are
interchangeable in many applications, but are not useful at cryogenic temperatures below 20 K.
Cernox™ and High-Temperature Cernox RTDs offer excellent sensitivity over a wide range of
temperatures, with resistance to strong magnetic fields and ionizing radiation. Cernox sensors
require calibration.
Table 1-1. Temperature Range of Typical Lake Shore Sensors
*
Diodes Model Useful Range
Silicon Diodes DT-670 1.4 – 500 K
GaAlAs Diode TG-120 1.4 – 475 K
Positive Temperature Coefficient (PTC) RTDs
100 Ω Platinum RTD PT-100, 250 Ω full scale
30 – 675 K
100 Ω Platinum RTD PT-100, 500 Ω full scale
30 – 800 K
Rhodium-Iron RTD RF-800-4 1.4 – 400 K
Negative Temperature Coefficient (NTC)
†
RTDs
Germanium RTD GR-200A-1500 1.4 – 100 K
Germanium RTD GR-200A-1000 1.4 – 100 K
Germanium RTD GR-200A-250 1 – 40 K
Carbon-Glass™ RTD CGR-1-500 3 – 325 K
Cernox™ RTD CX-1050 AA or SD 2– 325 K
Cernox™ RTD CX-1030 AA or SD 1 – 325 K
High-Temperature Cernox™ RTD CX-1030-SD-HT 1 – 420 K
Rox™ Ruthenium Oxide RTD RX-102A 1 – 40 K
Rox™ Ruthenium Oxide RTD RX-202A 1 – 40 K
Rox™ Ruthenium Oxide RTD RX-103A 1.4 – 325 K
Thermocouples
Chromel versus AuFe 0.07% Model 9006-002 1.4 – 610 K
Type E Model 9006-004 3.2 – 930 K
Type K Model 9006-006 3.2 – 1500 K
Type T Model 9006-008 3.2 – 670 K
* Sensors sold separately.
† Excitation current may limit the low temperature range of NTC resistors.
1-4 Introduction
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