Thermopile detector (dual element type) T11722-01

Datasheet [255 KB/PDF]

The T11722-01 is a dual-element type thermopile detector designed to detect CO2 concentration with high accuracy. It consists of a high sensitivity dual-element thermopile detector and two bandpass filters for sensing two wavelengths (reference: 3.9 μm, CO2: 4.3 μm) simultaneously.

・2 wavelengths detection (Reference: 3.9 μm, CO2: 4.3 μm)
・Metal package (TO-5)
・High sensitivity


Package Metal
Photosensitive area (per one element) 1.2 x 1.2 mm
Spectral response range 3.9 to 4.3 μm
Photosensitivity (typ.) 50 V/W
Dark resistance (typ.) 125 kΩ
Output noise voltage (typ.) 45 nV/Hz1/2
Noise equivalent power (typ.) 0.9 nW/Hz1/2
Detectivity (typ.) 1.3 x 108 cm・Hz1/2/W
Rise time (typ.) 20 ms
Rise time (max.) 30 ms
Temperature coefficient of element resistance (typ.) ±0.1 %/℃

Spectral response


Dimensional outline (unit: mm)


Disclaimer [66 KB/PDF]

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