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Coherent® Beam Position Thermopile Power Sensors 1098320 | 100mW-45W

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Active Area Diameter (mm):
Model Number:
LM-45 HTD Coherent Part Number: 1098320
Type of Sensor:
Quad Element Thermopile
Length of Cable (m):
Linearity (%):
Computer Interface:
Calibration Uncertainty (%):
Calibration Wavelength (nm):
Long Pulse Joule Mode Range (J):
0.5 - 10
Long Pulse Joule Mode Accuracy (%):
Spectral Compensation Accuracy (%):
Cooling Method:
Maximum Incident Beam Power (W):
Compatible Meters:
Wavelength Range (μm):
0.25 - 10.6

Regulatory Compliance

RoHS 2015:
Reach 224:
Certificate of Conformance:

Product Family Description

  • Thermopile Detector Element for High Power Measurements
  • Measure Beam Position on Detector Surface
  • ISO 17025 Certified

Coherent® Beam Position Sensing Thermopile Power Sensors are all-purpose sensors designed to measure the average power or energy of a wide variety of continuous wave or pulsed lasers. Coherent Beam Position Sensing Thermopile Power Sensors utilize a quadrant thermopile detector disk to sense the position of the laser beam on the detector surface while measuring the laser power. Coherent thermopile sensors can operate across a wide range of input powers, and do not saturate.

Note: The LM-20 is designed for embedded use and must be mounted on a heat sink.