Accessories and Ancillary Equipment

Temperature Controller Comparison Chart

Model

325

331S

332S

340

370

22

32

32B

42/44

62

9700

Control Type

PID

PID

PID

PID

PID

PID

PID

PID

PID

PID

PID

Sensor Input

2

2

2

2 included (additional optional)

1

2

2

2

2 (Model 42) 4 (Model 44)

2

2

Max Heater Power

25 W (Loop 1), 2 W (Loop 2)

50 W (Loop 1), 1 W (Loop 2)

50 W (Loop 1), 10 W (Loop 2)

100 W (Loop 1)

1 W

50 W

50 W

50 W (Loop 1), 10 W (Loop 2)

50 W (Loop 1), 10 W (Loop 2)

50 W

50 W

Max Heater Current

1 A

1 A

1 A

2 A

4 pA

1A

1A

1A

1 A

1 A

1 A

Supported Sensors

Silicon Diode

GaAlAs Diode

Platinum RTD

Thermocouple

Cernox™ RTD

*

*

^

Thermox RTD (Thermistor)

Germanium RTD

*

*

^

Carbon-Glass RTD

*

*

Ruthenium Oxide

*

*

^

Rhodium-Iron

Capacitance

Analog Output

Computer Interface

RS-232C

GPIB

USB

Ethernet

Standard design.     Available as an option.     * For operation >4 K.     ^ For operation <100 mK.

Janis offers temperature controllers from several manufacturers.  This flexibility allows you to choose a controller that best matches your existing equipment and software, or to select the one with features most closely matched to your new equipment requirement.  Janis sales engineers can assist in choosing the controller that best fits your technical requirements and budget.  (All controllers supplied by Janis include an interface cable to match your Janis cryostat.)

Manufacturers:
Lake Shore Cryotronics
Cryogenic Control Systems, Inc. (Cryo-con)
Scientific Instruments
Controller-Cryostat Compatibility Chart

Lake Shore Cryotronics

Lake Shore Cryotronics has been the recognized standard in cryogenic temperature control for over 35 years.  With thousands of satisfied users, today's Lake Shore controllers build upon the measurement and control expertise acquired by years of real, in the field experience.  Robust designs, feature-rich models, and excellent customer service make Lake Shore controllers an excellent choice for almost any application.

Lake Shore
Model 325

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Lake Shore
Model 331S

Top

This dual input controller is the standard for dual-sensor capability.  The 331S includes additional functions such as a built-in relay and an analog output (which can be used as a low powered PID control loop), and a 50 W heater output.  Compatible with GaAlAs and silicon diodes, platinum resistors, thermocouples as factory-specified option, and Cernox and carbon glass sensors for operation to 4 K, the 331S is a workhorse that can contribute strongly in almost any lab.  The 331S features both RS-232C and GPIB interfaces for more versatile computer control.

Lake Shore
Model 332S

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The model 332S controller creates a new standard for high resolution temperature measurement in an easy to use mid-priced temperature controller. The 332S builds on the features of the 331S, adding higher temperature resolution with Cernox and carbon glass thermometers for temperatures as low as 1.4 K, and two independent heater control loops.  The 10 W second control loop is ideal for use with sample in vapor cryostats, which typically include two sensors and two control heaters.

Lake Shore
Model 340

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The top of the line model 340 is the ideal choice for demanding applications such as the control of superconducting magnet cryostats.  Sensitive enough to control a He³ refrigerator, the model 340 can also supply up to 100 W of heater power.  Sensor input options can provide two additional dedicated standard inputs, eight-channel scanner, and capacitance sensor capability.

Lake Shore 
Model 370 AC Bridge

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Designed primarily for temperature measurements in the range from 20 mK to 1 K, the model 370 incorporates advanced circuitry design to minimize noise and sensor self heating measurement errors.  The 370 is available with up to 16 scanned input channels, and includes a PID controller, GPIB and RS-232C interfaces as standard features.  This model is ideally suited for dilution refrigerators, adiabatic demagnetization refrigerators, and He-3 systems.

Cryogenic Control Systems, Inc. (Cryo-con)

Cryogenic Control Systems, Inc. (Cryo-con) has been manufacturing high quality temperature controllers for several years. Although relatively new to the market, Cryo-con senior designers have many years of prior experience in the design and manufacture of cryogenic temperature controllers.  Cryo-con controllers are noted for including advanced operating features at a moderate price.

Cryo-con Model 22

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The model 22 offers a strong set of features at an entry level price.  Two input channels accept silicon diodes, and platinum resistors, as well as Cernox and carbon glass to 4 K.  The 50 watt heater includes a built-in overtemperature disconnect monitor, which can be configured by the user to prevent high temperature damage to sensitive equipment.  GPIB and RS-232C interfaces are provided for computer control. 

Cryo-con Model 32/32B

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The model 32 begins with the same feature set as the model 22, and adds several useful functions.  An analog output can be used with DAQ instrumentation, or as a low powered PID control loop.  Constant sensor voltage bias continually adjusts sensor excitation current (when used with resistance thermometers) in order to provide high measurement accuracy without self heating.  This feature enables the model 32 to be used with Cernox and carbon glass sensors to 1.4 K.  The model 32B adds a 10 W 2nd control loop, ideal for use with sample in vapor cryostats with two control heaters.

Cryo-con Model 42/44

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The model 42 includes 2 sensor inputs and the model 44 includes four sensor inputs, making it ideal for systems requiring simultaneous monitoring and control of multiple locations within the cryostat.  The model 42/44 is suitable for use <100 mK. 

Cryo-con Model 62

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This model uses high resolution electronics combined with sophisticated digital signal processing to provide high accuracy and low noise in the most demanding low temperature applications.  It features two sensor inputs, and can be operated as a sub-picowatt AC resistance bridge. A continuously variable current source outputs from 12 pA to 2.5 mA of current, enabling use with Cernox to 300 mK and Ge or RuO₂ to 30 mK.  Alarms, relays, analog output, and computer interfaces are also included. 

Scientific Instruments

Scientific Instruments (SI) manufactures a broad range of instrumentation for cryogenic research and industry.  Products include temperature controllers and thermometers, liquid cryogen level monitors, and temperature probes for aerospace and industrial applications.

Scientific Instruments Model 9700

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The 9700 represents the first model in a new generation of SI instrumentation.  It is a fully featured, dual sensor controller, and accepts silicon and GaAs diodes, along with RTD devices such as platinum (with optional module).  Analog outputs for both channels are included, along with two relays configurable for NO or NC operation.  A sophisticated autotuning algorithm can be used to accurately determine optimum PID settings, even in difficult systems such as cryocoolers operating near base temperature.  The 9700 comes with a fully-featured GUI for remote operation.