Cooled PbSe Photoconductive Detector

Overview
Features
Specifications
Package Size
Application

The Cooled Lead Selenide (PbSe) Photoconductive Detectors by LD-PD PTE.LTD. are high-performance sensors specifically engineered for the Mid-Infrared (MWIR) spectral range. By integrating advanced Thermo-Electric Coolers (TEC), these detectors achieve superior sensitivity and reduced thermal noise, making them the industry standard for gas analysis, flame detection, and spectroscopic applications.

Product model

Name	Model	Description	Parameter	Price
2x2mm Two Stage Cooled PbSe Photoconductive Detector [PDF] [RFQ]	LPT2H-28TO8	Response Range 1-5um, Active Area Size 2x2mm (Customizable)，Peak Wavelength 3.8-4.4μm, Package TO-8, Two Stage Cooled	Response wavelength: 1-5.0um Active area: 2x2mm Package: TO-8 Lead Time: 8-10 weeks	[Please inquire] Call us
1x1mm Two Stage Cooled PbSe Photoconductive Detector [PDF] [RFQ]	LPT2H-18TO8	Response Range 1-5um, Active Area Size 1x1mm (Customizable)，Peak Wavelength 3.8-4.4μm, Package TO-8, Two Stage Cooled	Response wavelength: 1-5.0um Active area: 1x1mm Package: TO-8 Lead Time: 8-10 weeks	[Please inquire] Call us
2x2mm Two Stage Cooled PbSe Photoconductive Detector [PDF] [RFQ]	LPT2-27TO37	Response Range 1-5um, Active Area Size 2x2mm (Customizable)，Peak Wavelength 3.8-4.4μm, Package TO-37, Two Stage Cooled	Response wavelength: 1-5.0um Active area: 2x2mm Package: TO-39 Lead Time: 8-10 weeks	[Please inquire] Call us
1x1mm Two Stage Cooled PbSe Photoconductive Detector [PDF] [RFQ]	LPT2-17TO37	Response Range 1-5um, Active Area Size 1x1mm (Customizable)，Peak Wavelength 3.8-4.4μm, Package TO-37, Two Stage Cooled	Response wavelength: 1-5.0um Active area: 1x1mm Package: TO-37 Lead Time: 8-10 weeks	[Please inquire] Call us
2x2mm One stage Cooled PbSe Photoconductive Detector [PDF] [RFQ]	LPT1-28TO8	Response Range 1-5um, Active Area Size 2x2mm (Customizable)，Peak Wavelength 3.8-4.4μm, Package TO-8, One stage Cooled	Response wavelength: 1-5.0um Active area: 2x2mm Package: TO-8 Lead Time: 8-10 weeks	[Please inquire] Call us
1x1mm One stage Cooled PbSe Photoconductive Detector [PDF] [RFQ]	LPT1-18TO8	Response Range 1-5um, Active Area Size 1x1mm (Customizable)，Peak Wavelength 3.8-4.4μm, Package TO-8, One stage Cooled	Response wavelength: 1-5.0um Active area: 1x1mm Package: TO-8 Lead Time: 8-10 weeks	[Please inquire] Call us

Parameter

Features

● Broad Spectral Coverage: Optimized response from 1.5 µm to 5.2 µm, with peak sensitivity concentrated between 3.8 µm and 4.4 µm.

● Dual Cooling Configurations: Available in both 1-stage and 2-stage TEC versions to meet specific Signal-to-Noise Ratio (SNR) and power consumption requirements.

● High Detectivity: Exceptional peak normalized detectivity in the Jones range, enabling the detection of extremely weak infrared signals.

● Precision TO-Packaging: Hermetically sealed TO-style headers with an integrated Thermistor for real-time temperature monitoring and precise closed-loop feedback control.

Specifications

Parameter	Symbol	Value (Typical)	Unit
Active Area Size	A	2X2(Customizable)	mm
Peak Wavelength	λ	3.8 – 4.4	μm
Peak Detectivity	D*	≥1X10¹⁰	cm*√Hz/w
Responsivity	Rv	≥1X10⁵	V/W
Dark Resistance	Rd	0.2 – 2.0	MΩ
Time Constant	Τ.	≤50	μs

Typical Amplified Circuit

Cooled PbSe Photoconductive Detector2.png

One stage Cooled PbSe Detector

PN#	Package	Cool type	Active Area (mm^2)	TEC Imax (A)	Operate Temp(℃)	Store Temp(℃)
LPT1-18TO8	TO-8	One Stage	1×1	1.5	-30-+50	-55-+80
LPT1-28TO8	TO-8	One Stage	2×2	1.5	-30-+50	-55-+80

Two stages Cooled PbSe Detector

PN#	Package	Cool type	Active Area (mm^2)	TEC Imax (A)	Operate Temp (℃)	Store Temp(℃)
LPT2-17TO37	TO-37	Two stage	1×1	1.2	-30~+60	-55-+80
LPT2-27TO37	TO-37	Two stage	2×2	1.2	-30-+60	-55-+80
LPT2H-18TO8	TO-8	Two stage	1×1	1.2	-30-+60	-55-+80
LPT2H-28TO8	TO-8	Two stage	2×2	1.2	-30-+60	-55-+80

Related Curve

Cooled PbSe Photoconductive Detector3.png

Package Size

Package with TEC--TO37

Package with TEC--TO8

Application

● Gas Sensing: NDIR (Non-Dispersive Infrared) detection for CO₂, CH₄, and NO.

● Industrial Safety: Flame and spark detection.

● Medical: Capnography and anesthesia gas monitoring.

● Environmental: Moisture and hydrocarbon analysis.

Uncooled PbSe Photoconductive Detector