Accessories and Ancillary Equipment

Temperature Controller Manufacturers

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• Lake Shore Cryotronics, Inc. (LSCI)

  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.

• -- Model 325

  

  A dual input controller compatible with most types of temperature sensors, the LSCI Model 325 features increased functionality over the model 321. This controller includes two independent control loops (25 W and 2 W) compatible with both 25 ohm and 50 ohm heaters. The model 325 features both GPIB and RS-232 computer interfaces for versatile computer control.

• -- Model 331S

  

  This dual input controller is the standard for dual-sensor capability. The LSCI 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.

• -- Model 332S

  

  The LSCI 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.

• -- Model 336

  

  The model 336 temperature controller is available with:

  • Four standard inputs
  • Two additional thermocouple inputs as an option
  • Two heater loops, one at 100 W, one at 50 W
  • Two additional 10V analog outputs
  • Cernox CX-1030 to 300 mK, or CX-1050 to 1.4 K

• -- Model 340

  

  The top of the line LSCI 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.

• -- Model 370 AC Bridge

  

  Designed primarily for temperature measurements in the range from 20 mK to 1 K, the LSCI 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.

• -- Model 24

  

  The Model 24 is a four-input, dual control loop cryogenic temperature controller designed for general purpose laboratory and industrial use. Each input is independent and capable of temperature measurement to <500mK with an appropriate temperature sensor. The Model 24 supports virtually any cryogenic temperature sensor produced by any manufacturer. For superior operation in cryocooler based applications, the Model 24 implements a synchronous filter that eliminates the thermal noise signature of the cooler. The dual-output control loop circuits features a primary 50W heater and an independent secondary heater of 10W. Cryo-con’s Model 24 incorporates Ethernet connectivity which adds a new dimension of flexibility to industrial and laboratory applications.

• -- Model 32/32B

  

  The Cryo-con 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 Cryo-con model 32B adds a 10 W 2nd control loop, ideal for use with sample in vapor cryostats with two control heaters.

• -- Model 42/44

  The Cryo-con model 42 includes 2 sensor inputs and the Cryo-con 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.

• -- Model 62

  

  The Cryo-con model 62 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.

• -- Model 9700

  

  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.