Product Description
Spectrum Detector TPR-D-61.5 Pyro Digital Radiometric Sensor with LIA-DPM Digital Lock-In Power Module – Broadband THz/FIR Measurement System
This used Spectrum Detector TPR-D-61.5 pyroelectric radiometer system includes the TPR-D-61.5 sensor probe and the LIA-DPM digital lock-in power module. Together, they form a complete broadband measurement solution for far-infrared (FIR) and terahertz (THz) sources.
Spectrum Detector Inc. (Lake Oswego, OR) is a recognized manufacturer of broadband radiometers and pyroelectric detectors for scientific and industrial applications . Their T.rad series has been widely used in terahertz research and laser development .
Key Specifications
| Specification | Details |
|---|---|
| Manufacturer | Spectrum Detector Inc. |
| Model | TPR-D-61.5 (Sensor Probe) |
| Compatible Module | LIA-DPM (Digital Lock-In Power Module) |
| Technology | Pyroelectric detector with preamplifier |
| Spectral Range | 0.1 – 100 THz (far-IR and THz spectrum) |
| Sensitivity | 50 nW with 2 nW resolution |
| Probe Diameter | 1.5 mm (typical for TPR-D-61.5) |
| Housing | Metal thermal isolation enclosure |
| Mounting | Threaded front bezel for windows, optics, and filters |
| Interface | USB (via LIA-DPM module) |
| Software | Executable lock-in amplifier and LabView support |
| Applications | CW IR lasers, THz sources, terahertz radiometry |
About the T.rad Series
The T.rad Series of broadband digital radiometers from Spectrum Detector are specifically designed for sensitivity in the far-IR and THz spectrum (0.1–100 THz) . Key features include:
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Complete System: A radiometer system comprises a pyroelectric probe and the LIA-DPM digital lock-in module
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Thermal Isolation: The pyroelectric detector and preamplifier are mounted in a metal housing that includes a thermal isolation enclosure
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Versatile Mounting: Threaded front bezel accepts windows, optics, and filters for application-specific configurations
The T.rad 1000D variant of this platform (using a 5mm probe) was specifically introduced for terahertz intensity measurements covering the entire spectrum from 0.1 to 30 THz .
LIA-DPM Digital Lock-In Module Features
The LIA-DPM is a USB-powered digital lock-in module that interfaces the pyroelectric probe to a PC . Key capabilities include:
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USB Powered: No external power supply required for the module
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User Controls: Range, filter tau, and batch size are user-selectable
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Software Interface: Multiple user screens including strip chart, statistics, tuning, and setup displays
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Data Logging: Users can choose to log data, creating files with specified batch sizes stored in host computer memory
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Post-Processing: Data files can be recalled and analyzed at any time
Measurement range for the T.rad 1000D system (similar configuration) is from 100 nW to 20 mW .
Applications
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Terahertz Research: Intensity measurements of broadband THz sources from 0.1-100 THz
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CW IR Laser Measurement: For those developing, manufacturing, or using continuous wave IR lasers
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Far-Infrared Spectroscopy: Pyroelectric detection for FIR measurements
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Quality Control: Production testing of THz and FIR sources
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R&D Laboratories: General-purpose broadband optical power measurement
Condition
SOLD AS IS
USED – SHOWS NORMAL HANDLING
FUNCTIONALITY NOT TESTED
NO USB CABLE, SOFTWARE, OR DOCUMENTATION INCLUDED (unless specified)
PICTURE MAY NOT MATCH PRODUCT
⚠ HANDLING NOTE: Pyroelectric detectors are sensitive to thermal and mechanical shock. Handle with care. The LIA-DPM module is static-sensitive; use proper ESD precautions when handling.






