Dexter's DR34 is a thin-film thermopile detector that comes in a TO-5 package. It is a dual channel device having a two-channel or one-channel design that delivers low noise output.
The dimensions of each active area are 3.16mm x 0.4mm. The channel-to-channel crosstalk is minimized using an internal aperture, thereby improving the device’s sensitivity.
Benefits
The main benefits of the Dexter's DR34 thermopile detector include:
- Dual channel design
- Low noise
- High sensitivity
- Reduced channel-to-channel crosstalk
Applications
The major applications of the Dexter's DR34 thermopile detector include:
- Analysis of environmental air quality including greenhouse gases
- Industrial and medical monitoring including infant incubators
- Automotive gas analysis
Technical Specifications
The technical specifications of the DR34 thermopile detector are summarized in the following table:
| Parameter |
Min |
Typical |
Max |
Symbol |
Units |
Comments |
| Active Area size |
3.16 x .4 |
AA |
mm |
Hot junction size, per element. |
| Element Area |
1.264 |
A |
mm2 |
|
| Number of Junctions |
40 |
|
|
Per element. |
| Number of Channels |
2 |
|
|
Per detector package. |
| Output Voltage |
90 |
115 |
130 |
Vs |
μV |
DC, H=330μW/cm2 (3) |
| Signal-to-Noise Ratio |
6,429 |
10,088 |
16,049 |
SNR |
√Hz |
DC, SNR=Vs/Vn |
| Responsivity |
21.6 |
27.6 |
31.2 |
ℜ |
V/W |
DC, ℜ=Vs/HA (2) |
| Resistance |
4.0 |
8.0 |
12 |
R |
kΩ |
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 |
8.1 |
11.4 |
14.3 |
Vn |
nV/√Hz |
Vn 2=4kTR |
| Noise Equivalent Power |
.26 |
.42 |
.65 |
NEP |
nW/√Hz |
DC, NEP= Vn HA/Vs (2) |
| Detectivity |
1.7 |
2.7 |
4.3 |
D* |
108cm√Hz/W |
DC, D*=Vs/ Vn H√A (2) |
| Time Constant |
|
38 |
|
ℑ |
ms |
Chopped, -3dB point (1) |
| Field of View |
NA |
FOV |
Degrees |
Not Applicable |
| Package Type |
TO-5 with 5 Pins |
|
|
Standard package hole size: Φ.180” |
| Element Matching |
|
5 |
10 |
M |
% |
M =|VA-VB|/VB (2) |
| Element Separation |
|
1.8 |
|
|
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
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 DR34 thermopile detector include:
- 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.