DR46 Compensated

DR46 Compensated Detector

DR46 Compensated Detector

A one-channel compensated thin-film thermopile in a TO-8 package. The active area and compensating element area are 4mm x 0.6mm each. Offers high output with very good signal-to-noise ratio. Internal aperture minimizes channel-to-channel crosstalk increasing sensitivity.

Non-contact temperature measurement, fire detection / suppression.

High output, low noise compensated rectangular shaped active area in a TO-8 package.


  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 DR46 Compensated (PDF).

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


Parameter Min Typical Max Symbol Units Comments
Active Area size     4 x .6   AA mm Hot junction size, per element.
Element Area     2.4   A mm2  
Number of Junctions     50       Per element.
Number of Channels     1 Compensated       Per detector package.
Output Voltage 170 210 250 Vs μV DC,  H=330μW/cm2 (3)
Signal-to-Noise Ratio 7,692 11,602 16,556 SNR √Hz DC, SNR=Vs/Vn
Responsivity 21.5 26.5 31.6 V/W DC, =Vs/HA  (2)
Resistance 14 20 30 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 15.1 18.1 22.1 Vn nV/√Hz Vn2=4kTR
Noise Equivalent Power ..48 .68 1.03 NEP nW/√Hz DC,  NEP= VnHA/Vs (2)
Detectivity 1.5 2.3 3.2 D* 108√Hz/W DC,  D*=Vs/ VnH√A  (2)
Time Constant   40   Τ ms Chopped, -3dB point (1)
Field of View     N/A   FOV Degrees See Assembly Drawings for FOV Description.
Package Type     TO-8 with 3 Pins       Standard package hole size:Ø.437
Element Matching   5 10


% M=|VA-VB|/VB (2)
Element Separation   NA     mm Center to Center
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
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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