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Thermopile Selection Guides

The guides below are designed to help you quickly focus in on exactly what you need. If you don’t see what you’re looking for below, Dexter Research Center also designs custom thermopile detectors and modules in addition to our standard line of thermopile detectors and modules. Our expertise can help you achieve the best performing system design for your applications.

Select by Application

The applications for thermopile detectors are limited only by the imagination. Past applications include non-contact temperature measurements such as tympanic thermometers, automobile climate control and occupancy sensing, process temperature monitoring, household appliances, and radiometers; gas analysis in medical, automotive, and petroleum industries; hazard control including flame and explosion detection; horizon sensors for scientific, space, and hobbyist applications.

The table below depicts the most common application for each sensor. Be sure to contact us if you have any questions!

Detector Value Key Description
Best Price Price Industry leading reliability and quality in an affordable detector.
Better Signal-to-Noise Ratio Better SNR All the reliability and quality with increased sensitivty.
Best Signal-to-Noise Ratio Best SNR Outstanding performance with Dexter’s world renowned reliability and quality.
Gas Analysis Non-Contact Temperature Fire Detection & Supression Laser Power Measurement & Control Research & Development Security (Motion Sensing)
Single Channel Detectors by Application
  S25 (TO-5, TO-18)            
  M5   Better SNR        
  S60M (TO-5, TO-18)   Best SNR Better SNR   Better SNR Better SNR
  M14            
  ST60 (TO-5) Price Price Price   Price Price
  ST60 (TO-18 ,Micro,LCC(new))            
  1M   Better SNR Better SNR   Better SNR  
  1SC Compensated            
  M34            
  DR34 Compensated            
  ST120 Better SNR         Better SNR
  ST150 Better SNR   Better SNR Price Better SNR Better SNR
  DR46 Compensated            
  2M Best SNR Better SNR Best SNR Better SNR Better SNR Best SNR
  3M       Better SNR Best SNR  
  6M       Best SNR Better SNR  
Gas Analysis Non-Contact Temperature Fire Detection & Supression Laser Power Measurement & Control Research & Development Security (Motion Sensing)
Multi-Channel Detectors by Application
  ST60 Dual Price Better SNR Price   Better SNR Price
  DR26            
  DR34 Better SNR Better SNR Best SNR   Better SNR Better SNR
  ST120 Dual Better SNR   Better SNR   Better SNR Better SNR
  ST150 Dual Better SNR       Better SNR  
  DR46 Better SNR          
  TM34            
  T34 Compensated Better SNR          
  ST60 Quad Price       Better SNR  
  ST120 Quad Better SNR       Better SNR  
  ST150 Quad Better SNR       Better SNR  
  2M Quad Best SNR       Best NSR  
  10 Channel Better SNR          
Arrays
  SLA32            
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Select by Configuration

Our detectors are hermetically sealed in TO-18, TO-5, or TO-8 transistor type packages, purged with an inert gas of choice, and heat treated to ensure long-term stability. We offer a wide range of optical filters, window materials, and diffractive lenses, which are in stock and available for your applications. The Thermally compensated detector models minimize the effect of sudden changes in ambient temperature. Dexter Research also offers internally mounted thermistors, optional internal apertures, internal heatsinks, and several choices of package aperture sizes to meet your design constraints.
Thermopile Model # of Chan’s Thermopile Technology Package Size Thermistor Option Optional Internal Aperture Package Hole Diameter (inches) Encapsulation Gas
Single-Channel Detectors by Configuration
S25 TO-18

1

Silicon

TO-18

External

Yes

Ø.080

Ne, N2, Ar, Xe

M5

1

Thin Film

TO-5

External

Yes

Ø.080-Ø.202 (1)

Ne, N2, Ar, Xe
S60M TO-5

1

Silicon

TO-5

External

Yes

Ø.080-Ø.202 (1)

Ne, N2, Ar, Xe
ST60 Micro

1

Silicon

Micro TO

Internal

-

Ø.058

Ne, N2, Ar, Xe

ST60 TO-5

1

Silicon

TO-5

Internal

Yes

Ø.125, Ø.150, Ø.180

Ne, N2, Ar, Xe
1M

1

Thin Film

TO-5

External

Yes

Ø.080-Ø.202 (1)

Ne, N2, Ar, Xe
M34

1

Thin Film

TO-5

External

-

Ø.080-Ø.202 (1)

Ne, N2, Ar, Xe

ST120

1

Silicon

TO-5

Internal

Yes

Ø.125, Ø.150, Ø.180

Ne, N2, Ar, Xe

DR46 Compensated

1

Thin Film

TO-8

External

Standard

Ø.250, Ø.325

Ne, N2, Ar, Xe
3M

1

Thin Film

TO-8

External

-

Ø.250, Ø.325

Ne, N2, Ar, Xe
(1) Included sizes Ø.080, Ø.100, Ø.125, Ø.150, Ø.180, Ø.202
Multi-Channel Detectors by Configuration

ST60 Dual

2

Silicon

TO-5

Internal

-

2 each 0.046 square

Ne, N2, Ar, Xe

DR34

2

Thin Film

TO-5

External

Standard

Ø.180, Ø.202

Ne, N2, Ar, Xe

ST150 Dual

2

Silicon

TO-5

Internal

-

2 each 0.090 square

Ne, N2, Ar, Xe
TM34

3

Thin Film

TO-8

Internal

Standard

Ø.437

Ne, N2, Ar, Xe

ST60 Quad

4

Silicon

TO-5

Internal

-

4 each 0.046 square

Ne, N2, Ar, Xe

ST150 Quad

4

Silicon

TO-8

Internal

-

4 each 0.090 square

Ne, N2, Ar, Xe

10 Channel

10

Thin Film

TO-8

Internal

Standard

Ø.437

Ne, N2, Ar, Xe
Array Detectors by Configuration
SLA32

2 x 16

Silicon

0.97″x1.27″ DIP

Internal

-

0.236 x 0.510

N2
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Select by Specification

The following specifications apply at 23°C with KBr Window and Argon encapsulating gas, except where noted on individual data sheets. Models ST60 Dual/Quad, ST150 Dual/Quad, SLA32, SA32×32 are encapsulated in Nitrogen. Test conditions were: 500K Blackbody source; Detector active surface 10 cm from 0.6513 Cm Diameter Blackbody Aperture; H=330mW/cm2.

For ease of viewing, we’ve broken down out detectors into four separate tables:

Single-Channel Silicon

Single-Channel Thin-Film (Bizmuth/Antimony)

Multi-Channel Silicon

Mutli-Channel Thin-Film (Bizmuth/Antimony)

Single-Channel Silicon by Specification S25TO-18 S25TO-5 S60MTO-18 S60MTO-5 ST60Micro ST60TO-18 ST60TO-5 ST60LCC ST120TO-5 ST150
Active Area Size (mm) .25 x. 25 .25 x. 25 .6 x .6 .6 x .6 .61 x .61 .61 x .61 .61 x .61 .61 x .61 1.2 x1.2 1.5 x 1.5
Element Area (mm2) 0.0625 0.0625 .036 .036 .037 .037 .037 .037 1.44 2.25
Number of Junctions 20 20 72 72 80 80 80 80 80 120
Number of Channels 1 1 1 1 1 1 1 1 1 1
Output Voltage (μV) 23 40 89 120 54 60 62 62 180 230
Signal-to-Noise Ratio 1,186 2,062 2,320 3,125 1,724 1,916 1,981 1,981 4,660 6,571
Responsivity (V/W) 111.5 193.9 74.9 101.0 44.0 48.9 50.5 50.5 37.9 31.0
Resistance (kΩ) 23 23 90 90 60 60 60 60 90 75
Temp. Coefficientof (%/°C) -0.04 -0.04 -0.04 -0.04 -0.04 -0.04 -0.04 -0.04 -0.04 -0.04
Temp. Coefficient of Resistance (%/°C) 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.02 0.11
Noise Voltage (nV/√Hz) 19.4 19.4 38.4 38.4 31.3 31.3 31.3 31.3 38.4 35.0
Noise Equivalent Power (nW/√Hz) 0.17 0.10 0.51 0.38 0.71 0.64 0.62 0.62 1.02 1.13
Detectivity (108√Hz/W) 1.44 2.5 1.17 1.6 0.86 .95 1.0 1.0 1.18 1.3
Time Constant (ms) 16 12 12 12 18 15 18 18 25 38
Field of View (Degrees) 88°/103° 69°/76° 76°/111° 64°/81° 36°/77° 40°/69° 64°/81° 45°/81° 52°/86° 88°/103°
Package Type TO-18 TO-5 TO-18 TO-5 Micro-TO TO-18 TO-5 LCC TO-5 TO-5
Operating Temperature (°C) -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 125 -50 to 100
Element Matching (%) NA NA NA NA NA NA NA NA NA NA
Element Separation (mm) NA NA NA NA NA NA NA NA NA NA

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Single-ChannelThin-Film by Specification M5 M14 1M 1SCComp M34 D34Comp DR46Comp 2M 3M 6M
Active Area Size (mm) 0.5 Dia .92 x .4 1.0 Dia 1.0 x 1.0 3.16 x.4 3.16 x.4 4 x .6 2 x 2 3 x 3 6.0 Dia
Element Area (mm2) 0.196 0.368 0.785 1.0 1.264 1.264 2.4 4.0 9.0 28.3
Number of Junctions 10 12 15 18 40 40 50 48 72 59
Number of Channels 1 1 1 1 Comp 1 1 Comp 1 Comp 1 1 1
Output Voltage (μV) 35 20 60 48 115 115 210 250 440 370
Signal-to-Noise Ratio 5,000 2,857 8,571 3,582 10,088 7,099 11,602 19,531 25,581 18,317
Responsivity (V/W) 54.1 16.5 23.5 14.5 27.6 27.6 26.5 18.9 14.8 4.0
Resistance (kΩ) 3 3 3 11 8 16 20 10 18 25
Temp. Coefficient of (%/°C) -0.36 -0.36 -0.36 -0.36 -0.36 -0.36 -0.36 -0.36 -0.36 -0.36
Temp. Coefficient of Resistance (%/°C) -0.20 -0.20 -0.20 -0.20 -0.20 -0.20 -0.20 -0.20 -0.20 -0.20
Noise Voltage (nV/√Hz) 7.0 7.0 7.0 13.4 11.4 16.2 18.1 12.8 17.2 20.2
Noise Equivalent Power (nW/√Hz) 0.13 0.43 0.30 0.92 0.42 0.59 0.68 0.68 1.16 5.10
Detectivity(108√Hz/W) 3.4 1.4 2.9 1.1 2.7 1.9 2.3 3.0 2.6 1.0
Time Constant (ms) 28 14 32 48 38 38 40 85 100 221
Field of View (Degrees) 64°/78° 53°/105° 56°/85° 20°/84° NA NA NA 38°/95° 63°/120° 75°/137°
Package Type TO-5 TO-18 TO-5 TO-5 TO-5 TO-5 TO-8 TO-5 TO-5 TO-8
Operating Temperature (°C) -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100
Element Matching (%) NA NA NA NA NA NA NA NA NA NA
Element Separation (mm) NA NA NA NA NA NA NA NA NA  

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Multi-Channel Silicon by Specification ST60 Dual ST120 Dual ST150 Dual ST60 Quad ST120 Quad ST150 Quad SLA32
Active Area Size (mm) .61 x .61 1.2 x 1.2 1.5 x 1.5 .61 x .61 1.2 x 1.2 1.5 x 1.5 .05 x .65
Element Area (mm2) .037 1.44 2.25 .037 1.44 2.25 0.0325
Number of Junctions 80 80 120 80 80 120 74
Number of Channels 2 2 2 4 4 4 2 x 16 Staggered
Output Voltage (μV) 62 165 230 62 140 230 14.8
Signal-to-Noise Ratio 1,981 4,301 6,571 1,981 3,649 6,571 423
Responsivity (V/W) 50.5 34.7 31.0 50.5 29.5 31.0 138.0
Resistance (kΩ) 60 90 75 60 90 75 76
Temp. Coefficientof (%/°C) -0.04 -0.04 -0.04 -0.04 -0.04 -0.04 -0.01
Temp. Coefficient of Resistance (%/°C) 0.11 0.02 0.11 0.11 0.02 0.11 0.11
Noise Voltage (nV/√Hz) 31.3 38.4 35.0 31.3 38.4 35.0 35.0
Noise Equivalent Power (nW/√Hz) 0.62 1.10 1.13 0.62 1.30 1.13 0.26
Detectivity (108√Hz/W) 1.0 1.09 1.3 1.0 0.92 1.3 0.7
Time Constant (ms) 18 25 38 18 25 38 7
Field of View (Degrees) 15°/47° 27°/77° 27°/99° 15°/47° 9°/63° 22°/85° NA
Package Type TO-5 TO-5 TO-5 TO-5 TO-5 TO-8 flat pack.97″ x 1.27″
Operating Temperature (°C) -50 to 100 -50 to 125 -50 to 100 -50 to 100 -50 to 125 -50 to 100 -50 to 100
Element Matching (%) 5 25 5 15 25 15 15
Element Separation (mm) 2.08 3.30 3.30 2.08 2.08 3.30 0.31

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Multi-Channel Thin-Film by Specification DR26 DR34 DR46 TM34 T34Comp 2MQuad 10 Channel
Active Area Size (mm) 2 x .6 3.16 x.4 4 x .6 3.16 x.4 3.16 x.4 2 x 2 3.16 x.4
Element Area (mm2) 1.2 1.264 2.4 1.264 1.264 4 1.264
Number of Junctions 26 40 50 40 40 48 40
Number of Channels 2 2 2 3 3Compensated 4 10
Output Voltage (μV) 54 115 210 115 115 250 115
Signal-to-Noise Ratio 5,684 10,088 16,406 10,088 7,099 19,531 10,088
Responsivity (V/W) 13.6 27.6 26.5 27.6 27.6 18.9 27.6
Resistance (kΩ) 5.5 8 10 8 16 10 8
Temp. Coefficientof (%/°C) -0.36 -0.36 -0.36 -0.36 -0.36 -0.36 -0.36
Temp. Coefficient of Resistance (%/°C) -0.20 -0.20 -0.20 -0.20 -0.20 -0.20 -0.20
Noise Voltage (nV/√Hz) 9.5 11.4 12.8 11.4 16.2 12.8 11.4
Noise Equivalent Power (nW/√Hz) 0.70 0.42 0.48 0.42 0.59 0.68 0.42
Detectivity (108√Hz/W) 1.6 2.7 3.2 2.7 1.9 3.0 2.7
Time Constant (ms) 38 38 40 38 38 85 38
Field of View (Degrees) NA NA NA NA NA NA NA
Package Type TO-5 TO-5w/5 pins TO-8w/5 pins TO-8w/12 pins TO-8w/12 pins TO-8w/12 pins TO-5
Operating Temperature (°C) -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100 -50 to 100
Element Matching (%) 5 5 5 5 5 5 10
Element Separation (mm) 1.10 1.80 2.00

See DWG

See DWG

 4.57 1.82 & 4.28

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