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Thermal Laser Power Sensor, LP2 Type, 20-5000 W, Ø50 mm, 350-2200 nm, Water-Cooled


  • Product Name
  • Absorber Type
    LP2 - Long pulse and CW high damage threshold
  • Aperture Size
    Ø50 mm
  • Spectral Range
    350 to 2200 nm
  • Minimum Power
    20 W
  • Maximum Average Power
    5000 W
  • Response Time
    3 s
  • Maximum Average Power Density
    2.5 kW/cm²
  • Maximum Energy Density <100 ns
    0.1 J/cm²
  • Maximum Energy Density 2 ms
    130 J/cm²
  • Cooling
  • Dimensions
    Ø146 x 47mm
  • Cable Length
    1.5 m
  • CE Compliance
  • UKCA Compliance
  • China RoHS Compliance


LP2 Sensors Coating With Very High Damage Threshold and Very Low Reflection

Even higher damage threshold…flat spectral response…absorption up to 96%... These are some of the characteristics of the new “LP2” type laser power sensors from Ophir.

Water Cooled Sensors: Things to Look Out For

Water cooled sensors are commonly used when measuring laser beams of more than a few hundred watts. In this video, you will learn about some critical issues you need to consider when using water cooling, such as water temperature, water flow rate, and corrosion prevention.

Choosing a Thermal Sensor

In this short “Basics” video we review the use – and selection - of thermal sensors for measuring low, medium and high laser powers.

Sensors for Measuring Laser Power

In this short "Basics" video we review in general how one goes about measuring laser beam power, so that you'll have a clear understanding of what the different sensor types are, and when to use each type.

Thermal Power Sensor Accuracy

Ophir former CTO Dr. Ephraim Greenfield discusses the various factors that contribute to uncertainties in measurement when using Ophir laser power and energy meters.

Effects of Incidence Angle on Measurements

In this video, you will learn to what degree a beam’s incidence angle matters, and for which sensor types this should be taken into account.

Thermal Sensor Calibration

As the spectral sensitivity of the absorber used for the power and energy measurement is not fully linear, Ophir sensors get a high precision calibration by default with more than one wavelength.

Each thermal sensor is calibrated independently of a particular Ophir power meter with its calibration information contained in the DB15 plug. When the sensor is connected to the meter, the meter reads and interprets this information to display a calibrated reading. Each power meter is calibrated independently and has the same sensitivity as an other meter within about 2 tenths of a percent.

Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

Absorption of different thermal sensor absorber types
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