Thermopile detector

T11722-12

High sensitivity thermopile detectors for CH4 concentration measurement

 

The T11722 series is a dual type thermopile detector developed for high accuracy measurement of gas concentration. These consist of two highly sensitive Si thermopile detectors and two band-pass filters. The T11722-11 can simultaneously detect two wavelengths of 4.26 μm (for CO2) and 3.9 μm (for reference), and the T11722-12 can simultaneously detect two wavelengths of 3.3 μm (for CH4) and 3.9 μm (for reference).

 

Features
- 2 wavelengths detection
- Metal package (TO-5)
- High sensitivity

Package TO-5
Photosensitive area (per one element) 1.2 x 1.2 mm
Spectral response range For reference: 3.9 μm,
for CH4: 3.3 μm
Photosensitivity (typ.) 50 V/W
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.) 0.03 %/℃

Spectral transmittance characteristics of window material (typical example)

Dimensional outline (unit: mm)

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