Thermopile infrared sensor TPD 2T 0625

Overview
The Excelitas TPD 2T 0625 dual-output thermopile detector integrates two independent sensing chips behind separate optical filter windows in a TO-39 metal housing. Each output covers a distinct spectral band for simultaneous reference and target-gas measurements. The compact TO-39 form factor simplifies integration into gas sensing modules and analytical instruments.

Design details
The detector provides dual-channel operation with one window typically fitted with a reference filter (G20) and the other fitted with a selectable narrow-bandpass filter matched to the target gas absorption line. An internal thermistor is included for thermopile temperature compensation and improved measurement stability over varying operating temperatures.

Features

• Dual independent outputs with separate optical windows
• TO-39 metal housing for thermal conduction and mechanical integration
• Integrated thermistor for temperature referencing
• Supplied with two narrow-bandpass filters (reference + target)

Applications

• High-precision gas sensing, analysis and monitoring systems

Technical specifications

• Responsivity: 33 V/W
• Sensitivity S100: 155 µV/K
• Noise: 36 nV/√Hz
• Time constant: 27 ms
• Housing with optical window: TO-39
• Field of view: 87°