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. Contact Janis today for assistance. (All controllers supplied by Janis include an interface cable to match your Janis cryostat.)
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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.
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.
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.
The model 336 temperature controller is available with:
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.
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.
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.
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.
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.
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.
The chart below may be used as a general guide when choosing a temperature controller to use with your Janis cryostat. Contact Janis for more detailed information.
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