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.