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Calorimetric Thermal Power Sensor, BB Type, 200-6000 W, 198x198 mm, 0.19-20 µm

WaterFlowMeter PC Application

Software: WaterFlowMeter PC Application
Power measurement based on water temperature and flow rate.

Firmware: Firmware of sensor can be upgraded via WaterFlowMeter PC application.
To download the firmware file go to: "Help/New Firmware" screen in WaterFlowMeter PC Application.

Note: When running the WaterFlowMeter PC Application, the Water Flow Meters (6K-W & 120K-W) are connected directly to the PC via supplied RS232 cable. If you want to use the Water Flow Meter with an Ophir power meter or with an Ophir interface with StarLab, the sensor operates as a standard thermal sensor measuring power only.


  • Product Name
  • Absorber Type
    BB - Broadband general purpose
  • Aperture Size
    198 x 198 mm
  • Spectral Range
    0.19-20 µm
  • Minimum Power
    200 W
  • Maximum Average Power
    6000 W
  • Response Time
    50 s
  • Maximum Average Power Density
    0.4 kW/cm²
  • Maximum Energy Density <100 ns
    0.3 J/cm²
  • Maximum Energy Density 2 ms
    10 J/cm²
  • Cooling
  • Dimensions
    200 x 200 x 61 mm (LxWxD)
  • Cable Length
    5 m
  • CE Compliance
  • UKCA Compliance
  • China RoHS Compliance


L6000W-BB-200x200 Sensor for High Power, Large Area Beams

Do you work with high power, large beams, such as from high power laser diodes? This sensor can measure up to 6KW, with an aperture of 200x200mm. Ophir’s new L6000W-BB-200x200 is small, fast, and does the job.

Scatter Shields: Reducing Back-Reflected Power from High Power Sensors

When measuring very high power laser beams, even the few percent of the beam normally back-scattered from the sensor can be a problem. Ophir now offers Scatter Shields as accessories for our high power laser sensors. These can be mounted on the front flange of the sensors to reduce the backscatter by about 70%.

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.

Measuring Very High Power Laser Beams

Laser beams with powers of many tens of Kilowatts are becoming more and more common in today's applications, industrial as well as research. This video will discuss the technical challenges in measuring such lasers, and will show you a range of solutions now available from Ophir for measuring up to 100KW -- safely, and accurately.

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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