ILX Lightwave LDT-5412B – Thermoelectric Temperature Controller

The ILX Lightwave LDT-5412B is a high-precision thermoelectric temperature controller for laser diode and optoelectronic component stabilization. Built around a hybrid proportional-integral control algorithm, it delivers exceptional temperature stability and fast settling performance in laboratory, research, and industrial environments. The instrument features an intuitive front panel with LED display modes for setpoint, actual temperature/resistance, and TE module current monitoring. A bipolar linear output drives thermoelectric modules across a ±2.00 A range with low noise (<250 µA rms). Multiple temperature sensor modes - 10 µA, 100 µA, and linearized 10 kΩ thermistor - accommodate diverse thermal sensing architectures.

Technical Specifications Temperature Control

Temperature stability (1 hour): ±0.005 °C

Temperature stability (24 hours): ±0.01 °C

Temperature coefficient: <0.0025 °C/°C

Settling time: <5 seconds

Control algorithm: Proportional (adjustable), Integral (fixed) Output

Current range: −2.00 A to +2.00 A

Compliance voltage: ±3 V

Output type: Bipolar, linear

Setpoint resolution: 0.01 A

Current noise and ripple: 6 W Sensor Input

Sensor type: NTC thermistor, 2-wire

Control resistance range: 10 kΩ to 200 kΩ

Sensor resistance range: 0 to 199.9 kΩ

Sensor resolution: 0.1 kΩ

User modes: 10 µA, 100 µA, linearized 10 kΩ

Accuracy (10 kΩ thermistor, 1% spec, Beta 3900–4050): ±1.0 °C

Temperature control range (linearized mode): −20 °C to 50 °C

Key Features

Hybrid PI control loop for precision regulation and fast transient response

Highly visible LED display with three operational modes

Adjustable proportional gain and fixed integral action

Front-panel I LIMIT knob and setpoint adjustment

Rear-panel 15-pin D-Sub connector for analog control signal output (~1 V/A)

Typical Applications

Laser diode temperature stabilization

Optoelectronic component thermal management

Precision temperature measurement and regulation

Research and laboratory environments requiring stringent thermal control

Compatibility & Integration Supports standard NTC thermistor sensors with control resistances from 10 kΩ to 200 kΩ. Analog voltage output via rear D-Sub connector enables integration with data acquisition and automated control systems.