1M Thermopile Detector

1M Thermopile Detector

1M Detector circuit overlay

1M Detector circuit overlay

A thin film-based thermopile with a 1.0mm diameter active area with good signal-to-noise ratio in a TO-5 package and a moderate time constant of 32ms with Argon encapsulation gas.

Excellent for non-contact temperature measurement.

Small active area with good signal-to-noise ratio.


  1. See Standard Windows and Filters (PDF) for list of optical filter options
  2. Internal aperture precisely defines active area for applications with FOV and/or spot size requirements. See Aperture Options (PDF) for available sizes.
  3. See Thermopile Configuration Table for more options.

For more detailed information see the datasheet 1M (PDF).

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

Parameter Min Typical Max Symbol Units Comments
Active Area size Ø1mm Dia. AA mm Hot junction size, per element.
Element Area
.785   A mm2  
Number of Junctions
15       Per element.
Number of Channels
1       Per detector package.
Output Voltage 50 60 80 Vs μV DC,  H=330μW/cm2 (3)
Signal-to-Noise Ratio 6,173 8,571 14,035 SNR √Hz DC, SNR=Vs/Vn
Responsivity 19.3 23.2 30.9 V/W DC, Responsivity=Vs/HA  (2)
Resistance 2.0 3.0 4.0 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 5.7 7.0 8.1 Vn nV/√Hz Vn2=4kTR
Noise Equivalent Power .19 .30 .42 NEP nW/√Hz DC,  NEP= VnHA/Vs (2)
Detectivity 2.1 2.9 4.8 D* 108√Hz/W DC,  D*=Vs/ VnH√A  (2)
Time Constant   32   Τ ms Chopped, -3dB point (1)
Field of View
56°/85°   FOV Degrees See Assembly Drawings for FOV Description.
Package Type
TO-5       Standard package hole size:Ø.080
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