2M

Features

A thin film-based single element thermopile detector that offers the world’s highest sensitivity in a TO-5 package. Dare to compare. Low noise voltage of 12.8nV/√Hz.

Applications

Excellent for gas analysis, fire detection and non-contact temperature measurement.

Benefit

Extremely high output with best signal-to-noise performance with a time constant of 85ms when encapsulated with Argon gas.

Options

See Standard Windows and Filters (PDF) for list of optical filter options.
Order this unit encapsulated with Xenon and this becomes a super-high output detector with very low noise.
See Thermopile Configuration Table for more options.
Internal 30kΩ 5% NTC chip thermistor provides ambient package temperature measurement. See DC-4005 section of Thermistor Options (PDF).

2M Thermopile Detector
2M Detector circuit overlay

Datasheet

For more detailed information see the datasheet:

2M 244.52 KB

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Parameter	Min	Typical	Max	Symbol	Units	Comments
Active Area size		2 x 2		AA	mm	Hot junction size, per element.
Element Area		4		A	mm²
Number of Junctions		48				Per element.
Number of Channels		1				Per detector package.
Output Voltage	200	250	300	V_s	μV	DC, H=330μW/cm² (3)
Signal-to-Noise Ratio	12,739	19,531	33,333	SNR	√Hz	DC, SNR=V_s/V_n
Responsivity	15.2	18.9	22.7		V/W	DC, =V_s/HA (2)
Resistance	5	10	15	R	kΩ	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	9.9	12.8	15.7	V_n	nV/√Hz	V_n²=4kTR
Noise Equivalent Power	.44	.68	1.03	NEP	nW/√Hz	DC, NEP= V_nHA/V_s (2)
Detectivity	1.9	3.0	5.0	D*	10⁸√Hz/W	DC, D*=V_s/ V_nH√A (2)
Time Constant		85		Τ	ms	Chopped, -3dB point (1)
Field of View		38°/95°		FOV	Degrees	See Assembly Drawings for FOV Description.
Package Type		TO-5				Standard package hole size:Ø.150″
Operating Temperature	-50		100	T_a	°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.