A thin film-based single element thermopile. The highest output detector in our line-up.
Excellent for laser power measurement and can be used for gas analysis.
Highest signal-to-noise ratio with larger TO-8 package and higher cost.
3M Thermopile Detector
3M Detector circuit overlay
For more detailed information see the datasheet:
| Parameter | Min | Typical | Max | Symbol | Units | Comments |
|---|---|---|---|---|---|---|
| Active Area size | 3 x 3 | AA | mm | Hot junction size, per element. | ||
| Element Area | 9 | A | mm2 | |||
| Number of Junctions | 72 | Per element. | ||||
| Number of Channels | 1 | Per detector package. | ||||
| Output Voltage | 400 | 440 | 500 | Vs | μV | DC, H=330μW/cm2 (3) |
| Signal-to-Noise Ratio | 18,100 | 25,581 | 31,847 | SNR | √Hz | DC, SNR=Vs/Vn |
| Responsivity | 13.5 | 14.8 | 16.8 |  |
V/W | DC, =Vs/HA (2) |
| Resistance | 15 | 18 | 30 | R | kΩ | Detector element |
| Temperature Coefficient of |
-.36 | %/°C | Best linear fit, 0° to 85°C (1) | |||
| Temperature Coefficient of R | -.2 | %/°C | Best fit, 0° to 85°C (1) | |||
| Noise Voltage | 15.7 | 17.2 | 22.1 | Vn | nV/√Hz | Vn2=4kTR |
| Noise Equivalent Power | .93 | 1.16 | 1.64 | NEP | nW/√Hz | DC, NEP= VnHA/Vs (2) |
| Detectivity | 1.8 | 2.6 | 3.2 | D* | 108√Hz/W | DC, D*=Vs/ VnH√A (2) |
| Time Constant | 100 | Τ | ms | Chopped, -3dB point (1) | ||
| Field of View | 63°/120° | FOV | Degrees | See Assembly Drawings for FOV Description. | ||
| Package Type | TO-8 | Standard package hole size:Ø.080 | ||||
| Operating Temperature | -50 | 100 | Ta | °C |
Specifications apply at 23°C with KBr Window and Argon encapsulating gas.
Flat spectral response from 100nm to > 100µm. Linear signal output from 10-6 to 0.1W/cm2.
Maximum incident radiance 0.1W/cm2 , damage threshold ≥ .5W/cm2
(1) Parameter is not 100% tested. 90% of all units meet these specifications.
(2) A is detector area in cm2.
(3)Test Conditions: 500K Blackbody source; Detector active surface 10cm from 0.6513cm Diameter Blackbody Aperture.