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| Coad | 671291 | Type | USB Thermopile Laser Power Meter | |
| Power Range | 2mW - 2W | Power Range (with Attenuator) | - | |
| Wavelength(nm) | 190 - 25000 | Maximum Incident Beam Diameter (mm) | 22.00 | |
| Storage Temperature | -20°C - 70°C | Operating Temperature | 5°C - 45°C | |
| Detector Material | Thermopile | Detector Coating | Broadband Coating | |
| Maximum Energy Density | 15.0kW/cm? | Maximum Power Density (with Attenuator) | - | |
| Host Data Transmission Interface | USB 2.0 | Response Time | <1.0sec（0-90%） | |
| Calibration Uncertainty | ±2% | Sensitivity | 2.0mW | |
| Linearity | ±1% | |||
LBTEK USB laser power meters are available in two types: thermopile-based and photodiode-based. The thermopile power meter uses a thermopile sensor made of series-connected thermocouples, making it suitable for high-power measurements, while the photodiode power meter uses a multi-channel photodiode sensor, ideal for low-power measurements.
The USB laser power meter features a wide wavelength measurement range, supporting operation from 190 nm to 25 μm. It also covers a broad power measurement range, capable of measuring continuous laser power from 1 nW to 200 W. In addition, it offers multiple choices for detector area, with maximum incident beam diameters ranging from 9 mm to 25 mm. Users can select the product that best fits their requirements but must ensure that the maximum power density of the chosen sensor is not exceeded during operation.
The LBTEK USB thermopile laser power meter uses a thermopile sensor made of series-connected thermocouples. The sensor absorbs incident laser radiation and converts it into heat. When the laser beam is focused on the detector’s active area, heat is generated and diffuses from the center toward the edges through the passive region, creating a potential difference between the hot and cold junctions of the thermocouples. This voltage signal is then read and displayed by the software. It can measure continuous laser power from 100 μW to 200 W. By connecting to a PC via the provided USB data cable, the software displays real-time measurement data, statistical data, and stability values. The software also shows a measurement curve with up to 40,000 data points and supports basic operations such as zooming, saving, and opening recorded data. The LBTEK USB thermopile laser power meter is available with three effective detector area options: 9 mm, 22 mm, and 25 mm.
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