Key Features: · 500 µW to 2W range · 19 mm diameter active area · Spectrally flat broadband coating · 0.19 to 11 µm spectral range · Convective air-cooled · ISO 17025 accredited This PM3 sensor is an amplified thermopile power sensor intended for measuring low power lasers down into the mW range. The sensor is terminated in a SmartSensor DB25 cable and is directly compatible with all power meters in the catalog. A USB-direct model (PN 1174263) is available. For enhanced thermal stability, the PM3Q (PN 1098419) includes a quartz window to more effectively eliminate thermal background radiation. Note that the window limits the spectral range to 0.3 to 2.1 µm.