T11722-01_15 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – For CO2 concentration measurement High sensitivity

Thermopile detector
T11722-01
For CO2 concentration measurement, High sensitivity
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 band-pass filters for sensing two wavelengths
(reference: 3.9 μm, CO2: 4.3 μm) simultaneously.
Features
2 wavelengths detection
(Reference: 3.9 μm, CO2: 4.3 μm)
Metal package (TO-5)
High sensitivity
Applications
CO2 concentration measurement
Absolute maximum ratings
Parameter
Symbol
Value
Unit
Operating temperature
Topr
-30 to +85
°C
Storage temperature
Tstg
-40 to +125
°C
Note: Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the
product within the absolute maximum ratings.
Electrical and optical characterisitics (Ta=25 °C)
Parameter
Photosensitive area
(per 1 element)
Spectral response range
Photosensitivity*¹
Element resistance
Noise voltage
Noise equivalent power*¹
Detectivity*¹
Rise time
Temperature coefficient of
element resistance
*1: Without filter
Symbol
-
λ
S
Rd
Vn
NEP
D*
tr
TCR
Condition
Absorption layer size
Band-pass filter,
center wavelength
(FWHM)
1 Hz, 500 K
Johnson noise
0 to 63%
Min.
Typ.
-
1.2 × 1.2
-
40
100
-
-
0.9 × 10⁸
-
-
For reference: 3.9 (0.09)
For CO2: 4.3 (0.14)
50
125
45
0.9
1.3 × 10⁸
20
±0.1
Max.
-
-
60
150
50
1.3
-
30
-
Unit
mm
μm
V/W
kΩ
nV/Hz^1/2
nW/Hz^1/2
cm∙Hz^1/2/W
ms
%/°C
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