Lake Shore 332

The Lake Shore 332 is a dual-channel temperature controller delivering high-resolution measurement and precise regulation across cryogenic to elevated temperatures. Built on proven architecture with enhanced electronics, it accommodates diode, RTD, and thermocouple sensors from 500 mK to above 800 K depending on sensor selection. Two independent PID control loops with autotuning and zone-based parameter adjustment enable stable operation across extreme temperature spans.

Technical Specifications Sensor Inputs

Two independent sensor channels with 24-bit ADC resolution per input

Supports diode, RTD (NTC, Cernox®), and thermocouple sensors

Automatically scalable excitation current: 1 µA to 1 mA

1 µA excitation available for NTC RTD sensors up to 75 kΩ to minimize self-heating

10 µA and 100 µA excitation options; manual range fixing supported

Sensor excitation current reversal eliminates thermal EMF errors on resistive sensors

Optical isolation ensures low-noise, repeatable measurements

Input configuration fixed at order; field reconfiguration not available

Data acquisition: 10 samples per second per input; display updates twice per second Temperature Measurement Ranges

NTC RTD: 500 mK and above

Cernox® thin-film RTD: 0.3 K to 420 K

Silicon diodes: 1.4 K to above room temperature

Platinum RTD: 14 K to 873 K (PT-102/3) or 14 K to 673 K (PT-111); typical range 30 K to above 800 K Control Architecture

Two independent proportional-integral-derivative (PID) control loops

Autotuning available for both loops; manual PID configuration supported

Setpoint ramp feature for smooth continuous adjustments

Zone feature: up to ten temperature zones with automatic parameter adjustment Heater Output (Loop 1)

Well-regulated variable DC current source

Optically isolated to minimize interference and ground loops

Maximum continuous power: 50 W

Key Features

Dual independent control channels for simultaneous measurement and regulation

High-resolution 24-bit conversion minimizes quantization noise

Flexible excitation current scaling optimizes signal integrity across wide impedance ranges

Thermal EMF cancellation via current reversal on resistive sensors

Optical isolation reduces system noise and cross-talk

Zone-based control enables stable operation across multi-decade temperature ranges

Typical Applications Material characterization, cryogenic research, superconductor testing, dilution refrigerator operation, thermal cycling experiments, and precision temperature stabilization in laboratory and industrial settings.