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Coherent PowerMax-USB PM3Q Low Power Sensor

Updated:2025-03-13

Brand: Coherent
Model: PowerMax-USB PM3Q
Description: This PowerMax-USB PM3Q sensor is an amplified thermopile power sensor intended for measuring low power lasers down into the mW range. It includes a quartz window to more effectively eliminate thermal
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Product Details

Coherent PowerMax-USB PM3Q Low Power Sensor Description：

User's Manual

This PowerMax-USB PM3Q sensor is an amplified thermopile power sensor intended for measuring low power lasers down into the mW range. It 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.

The sensor is terminated in a USB cable that interfaces directly to a PC. A DB25 model (PN 1098419) is available.

For a wider spectral range, the similar PowerMax-USB PM3 model (PN 1174263) does not include the quartz filter, enabling a spectral range of 0.19 to 11 μm.

Low power thermopile for measuring pulsed & CW lasers between 0.5 mW and 2W. Includes a quartz window to more effectively eliminate thermal background radiation. Direct USB interface.

Key Features:

500 μW to 2W range

10 mm diameter active area

0.3 to 2 μm spectral range

Quartz window

Convective air-cooled

Direct USB interface

ISO 17025 accredited

Specifications

Cable Type

USB

Cooling Type

Air

Power Range

500 uW to 2W

Active Area Diameter

10 mm

Detector Coating

Black

Noise Equivalent Power (milliwatts)

0.02

Maximum Intermittent Power (watts)(<5 minutes)

Wavelength Range (micrometers)

0.3 to 2 μm

Maximum Power Density (kilowatts per square centimeter)

500 W/cm2

Maximum Energy Density (millijoules per square centimeter)

50 mJ/cm2 10 ns, 1064 nm

Response Time, Speed-up On, 0% to 95% (seconds)

Window

None

Diffuser

Yes

Calibration Uncertainty (%)(k=2)

±2

Power Linearity (%)

±1

Spectral Compensation Accuracy (%)

±1.5

Calibration Wavelength (nanometers)

514

Cable Length (meters)

2.5

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