6M Detector circuit overlay

6M Detector circuit overlay

6M Thermopile Detector

6M Thermopile Detector

A thin film-based single element thermopile with the largest active area in our line up at 6.0mm diameter in a large TO-8 package

Very large active area and high output makes it an excellent choice for laser power measurements.

Large active area and high output that is higher in cost and in a large package size.


  1. See Standard Windows and Filters (PDF) for list of optical filter options
  2. See Thermopile Configuration Table for more options.

For more detailed information see the datasheet 6M (PDF).

Specifications apply at 23°C with KBr Window and Argon encapsulating gas.

Parameter Min Typical Max Symbol Units Comments
Active Area size   Ø6mm Dia.   AA mm Hot junction size, per element.
Element Area   28.3   A mm2  
Number of Junctions   59       Per element.
Number of Channels   1       Per detector package.
Output Voltage 300 370 450 Vs μV DC,  H=330μW/cm2 (3)
Signal-to-Noise Ratio 12,552 18,317 28,662 SNR √Hz DC, SNR=Vs/Vn
Responsivity 3.2 4.0 4.8 V/W DC, =Vs/HA  (2)
Resistance 15 25 35 R 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 20.2 23.9 Vn nV/√Hz Vn2=4kTR
Noise Equivalent Power 3.25 5.10 7.45 NEP nW/√Hz DC,  NEP= VnHA/Vs (2)
Detectivity .7 1.0 1.6 D* 108√Hz/W DC,  D*=Vs/ VnH√A  (2)
Time Constant   221   Τ ms Chopped, -3dB point (1)
Field of View   75°/137°   FOV Degrees See Assembly Drawings for FOV Description.
Package Type   TO-8       Standard package hole size:Ø.437
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

(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.

Product Finder

Product Comparison Guide

The Gold Standard

The Collaboration Station

Contact Us