LakeShore Model:331S Temperature Controller RTD Cryotronics

Lake Shore Model 331S Temperature Controller (Used, Fully Operational)

You are purchasing a used Lake Shore Model 331S Temperature Controller, which is fully operational. This unit was removed from a working cryogenic laboratory, professionally cleaned, and tested by a qualified technician to ensure full functionality. It is guaranteed to be in good working condition.

✅ Condition: Used, fully operational, professionally cleaned and tested
✅ Guarantee: Guaranteed to be fully functional and ready for use

Description:

The Lake Shore Model 331S Temperature Controller delivers reliable and precise temperature measurement and control for cryogenic and low-temperature applications. Building on the success of the Model 330, the 331S offers improved sensor support, advanced control capabilities, and enhanced interface options. It is compatible with diodes, platinum RTDs (including NTC types), and thermocouples, and provides dual sensor inputs, dual control outputs, and automated tuning features for both high and low power applications.

With RS-232C and IEEE-488 (GPIB) communication, analog output, and relay control, the 331S is ideal for laboratory, industrial, or research use where stability and precision are essential. The device supports advanced curve calibration options including Lake Shore CalCurves and user-defined curves, offering flexibility and accuracy across a wide operating range—down to 1.2 K with appropriate sensors.

Key Features:

• Wide Temperature Range: Operates down to 1.2 K with compatible sensors
• Sensor Compatibility: Supports diodes, RTDs, and thermocouples
• Dual Sensor Inputs: Each with 24-bit resolution and separate excitation
• Sensor Excitation Reversal: Minimizes thermal EMF error in resistance sensors
• Dual Control Loops:
• Loop 1: 50 W
• Loop 2: 1 W
• Computer Interfaces:
• IEEE-488 (GPIB)
• RS-232C Serial
• Analog Outputs & Alarm Relays: Programmable (331S only)
• Calibrated Curve Support:
• Built-in SoftCal  for silicon diodes and platinum RTDs
• Supports up to 20 user-defined or factory CalCurves
• Sensor Reading Frequency: Up to 10 readings per second
• Display Update Rate: Twice per second

Measurement & Display Capabilities:

• Temperature Range: 1.2 K and up (depends on sensor type)
• Sensor Inputs: 2 optically-isolated inputs with precision current sources
• Control Outputs: Dual-loop PID control with auto-tuning
• Data Storage: Non-volatile memory for up to 20 calibration curves
• User Interface: Front panel control and full remote control via interface

Interface Options (Model 331S only):

• IEEE-488 (GPIB) for advanced automation and data acquisition
• RS-232C serial interface (standard)
• Analog voltage output
• Relay alarms for process control and safety applications

Included in the Kit:

• Lake Shore Model 331S Temperature Controller
• Power Cable
• Cable for input A & B, thermocouples Heater output Available
• NO interface cables included
• RS-232C cables for remote operation)

Guaranteed to be Fully Operational:

This Lake Shore Model 331S Temperature Controller has been professionally cleaned, tested, and verified to be in excellent working condition. It is ideal for precision cryogenic temperature control in research, development, and industrial environments.

Perfect for:

• Cryogenic Research & Testing
• Superconductivity Experiments
• Low-Temperature Physics Laboratories
• Semiconductor Manufacturing
• Industrial Cryogenic Systems