Posted in | Thermocouples

3M Thin Film-Based Single Element Thermopile Detector

Dexter’s 3M thin film-based single element thermopile detector provides the highest output among all in the series. It has a high signal-to-noise ratio with a larger TO-8 package.

Benefits

The key benefits of the 3M thin film-based single element thermopile include:

  • High signal-to-noise ratio
  • Larger TO-8 package
  • High output

Applications

The 3M thin film-based single element thermopile can be used in the following application:

  • Gas analysis
  • Laser power measurement

Technical Specifications

The technical specifications of the 3M thin film-based single element thermopile are summarized in the following table:

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, ℜ=Vs/HA (2)
Resistance 15 18 30 R Detector element
Temperature Coefficient of ℜ   -.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 Vn 2=4kTR
Noise Equivalent Power .93 1.16 1.64 NEP nW/√Hz DC, NEP= Vn HA/Vs (2)
Detectivity 1.8 2.6 3.2 D* 108cm√Hz/W DC, D*=Vs/ Vn H√A (2)
Time Constant   100   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: Φ.250”
Operating Temperature -50   100 Ta °C  

 

General Specifications: 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

Notes: (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.

General Specifications

The general specifications of the 3M thin film-based single element thermopile are listed below:

  • Flat spectral response from 100nm to > 100μm
  • Linear signal output from 10-6 to 0.1W/cm2
  • Maximum incident radiance is 0.1W/cm2
  • Damage threshold is ≥ 0.5W/cm2

Notes

  • Specifications apply at 23°C with KBr window and nitrogen encapsulating gas
  • Parameter is not 100% tested. 90% of all units meet these specifications
  • A is detector area in cm2
  • Test conditions: 500K blackbody source; detector active surface 10cm from 0.6513cm diameter blackbody aperture

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