0.1 mW to 20 W OEM Thermopile Laser Power Sensor

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Overview

These compact OEM thermopile sensors are for measuring laser power from 0.1 mW to 20 W

Sensors come with threaded holes for mounting to host system
Up to 20 W laser power measurement
Compact design

Products

Compare	Model	Compatibility	rankScore		Maximum Average Power	Aperture Size	Communication	Minimum Power	Spectral Range	Availability	Price	Brand
3A-UAF 3A-UAF OEM Thermopile Power Sensor, 100 µW to 3 W, Ø9.5 mm, 0.19-20 µm Contact Us	3A-UAF 3A-UAF OEM Thermopile Power Sensor, 100 µW to 3 W, Ø9.5 mm, 0.19-20 µm	UNIVERSAL	1.0	1.0	3 W	Ø9.5 mm	RS232, Analog	100 µW	0.19-20 µm	Contact Us
7Z07129 20C-BB-12-SH OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-11 µm $1,267 Contact Us	7Z07129 20C-BB-12-SH OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-11 µm	UNIVERSAL	1.0	2.0	20 W heat sinked	Ø12 mm		10 mW	0.19-11 µm	Contact Us	$1,267	Ophir
20C-UAS 20C-UAS OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-20 µm, RS232 Contact Us	20C-UAS 20C-UAS OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-20 µm, RS232	UNIVERSAL	1.0	3.0	20 W heat sinked	Ø12 mm	RS232, Analog	10 mW	0.19-11 µm	Contact Us
20C-UAU 20C-UAU OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-20 µm, USB Contact Us	20C-UAU 20C-UAU OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-20 µm, USB	UNIVERSAL	1.0	4.0	20 W heat sinked	Ø12 mm	USB	10 mW	0.19-11 µm	Contact Us
20C-UAE 20C-UAE OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-20 µm, Ethernet Contact Us	20C-UAE 20C-UAE OEM Thermopile Power Sensor, 10 mW to 4/20 W, Ø12 mm, 0.19-20 µm, Ethernet	UNIVERSAL	1.0	5.0	20 W heat sinked	Ø12 mm	Ethernet	10 mW	0.19-11 µm	Contact Us

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Features

OEM Laser Power Meter and Sensor

In this video, Jimmy Green, Ophir OEM Specialist, explains how Ophir can solve laser measurement challenges if a solution cannot be found from the hundreds of products in our catalog.

Cooling of OEM Sensors: Heat Sinking

Many of Ophir’s OEM power sensors have a maximum average power specification of “XX watts free standing, YY watts heat sinked.” In this video, you will learn some guidelines for making sure that a sensor has been provided with proper heat sinking so it does not get damaged.

Clarifications: Range Selection, Measurement Duration

Sometimes, even experienced users of laser measurement equipment come across some issues that, although basic, need to be clarified. This video reviews 2 such issues: (1) selection of correct range when it's not quite obvious (and what happens if one goes over range), and (2) how long a measurement duration may be.

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.

Frequently Asked Questions

Sensor Finder does not find a match for my application. Is there the possibility to create an OEM sensor for my application?
Answer
Yes, we have the ability to rapid prototype standard OEM sensors to help with custom applications where an off the shelf sensor does not fill the requirement.

What is the dynamic range of OEM sensors?
Answer
In general, the dynamic range over a given range, i.e. the ratio of maximum useable power to minimum useable power of Ophir thermal OEM sensors is 40:1. If greater dynamic range is desired, Ophir OEM RS232 sensors are available with several selectable ranges.

Do I need to recalibrate my instrument? How often must it be recalibrated?
Answer
Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

When an accuracy spec is given, what exactly is meant?
Answer
The Ophir specification on accuracy is in general 2 sigma standard deviation. This means, for instance, that if we list the accuracy as +/-3%, this means that 95% of the sensors will be within this accuracy and 99% will be within +/-4%. For further information on accuracy see calibration procedure tutorial.

Does the damage threshold depend on power level?
Answer
The damage threshold of thermal sensors does depend on the power level and not only the power density because the sensor disc itself gets hotter at high powers. For instance, the damage threshold of the Ophir broadband coating may be 50KW/cm2 at 10 Watts but only 10KW/cm2 at 300W. The Ophir specifications for damage threshold are always given for the highest power of use of a particular sensor, something which is not done by most other manufacturers. This should be taken into account when comparing specifications. The Sensor Finder takes the power level into consideration when calculating damage threshold.

I see Ophir has released some new thermal sensors with an absorber called “LP2”. What is it?
Answer
The new “LP2” type sensors are specially designed for beams having high power and high power density (and for pulsed beams, high energy density). The LP2 sensors are replacing the equivalent LP1 sensors. As impressive as the LP1 is, the LP2 was developed with the following improvements:
- Very high damage threshold, for both power density and energy density, for long pulse and CW beams.
- Spectrally flat. Since its absorption remains constant at widely differing wavelengths, this means that sensors based on the LP2 can be used for "white light" or polychromatic beams.
- Very high level of absorption (as high as 96%, depending on wavelength), meaning much less light is scattered back, which for high power beams is an important benefit.
- The absorption is also largely independent of incident angle, which means it can be used for divergent beams too.

What are the advantages of the new LP2 absorber coating vs the previous LP1 coating?

Answer

The new LP2 coating has a number of advantages vs the previous LP1 coating:

Absorber	LP1	LP2
Damage Threshold at 1kW	6 kW/cm²	10 kW/cm²
Damage Threshold at 3kW	2.5 kW/cm²	5 kW/cm²
Damage Threshold at 5kW	2 kW/cm²	2.5 kW/cm²
Pulsed damage threshold for 10ms pulses	160 J/cm²	400 J/cm²
Spectral Absorption	See graphs in technical note
Angle dependence	See graphs in technical note

Frequently Asked Questions

Sensor Finder does not find a match for my application. Is there the possibility to create an OEM sensor for my application?
Answer
Yes, we have the ability to rapid prototype standard OEM sensors to help with custom applications where an off the shelf sensor does not fill the requirement.

What is the dynamic range of OEM sensors?
Answer
In general, the dynamic range over a given range, i.e. the ratio of maximum useable power to minimum useable power of Ophir thermal OEM sensors is 40:1. If greater dynamic range is desired, Ophir OEM RS232 sensors are available with several selectable ranges.

Do I need to recalibrate my instrument? How often must it be recalibrated?
Answer
Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

When an accuracy spec is given, what exactly is meant?
Answer
The Ophir specification on accuracy is in general 2 sigma standard deviation. This means, for instance, that if we list the accuracy as +/-3%, this means that 95% of the sensors will be within this accuracy and 99% will be within +/-4%. For further information on accuracy see calibration procedure tutorial.

Does the damage threshold depend on power level?
Answer
The damage threshold of thermal sensors does depend on the power level and not only the power density because the sensor disc itself gets hotter at high powers. For instance, the damage threshold of the Ophir broadband coating may be 50KW/cm2 at 10 Watts but only 10KW/cm2 at 300W. The Ophir specifications for damage threshold are always given for the highest power of use of a particular sensor, something which is not done by most other manufacturers. This should be taken into account when comparing specifications. The Sensor Finder takes the power level into consideration when calculating damage threshold.

I see Ophir has released some new thermal sensors with an absorber called “LP2”. What is it?
Answer
The new “LP2” type sensors are specially designed for beams having high power and high power density (and for pulsed beams, high energy density). The LP2 sensors are replacing the equivalent LP1 sensors. As impressive as the LP1 is, the LP2 was developed with the following improvements:
- Very high damage threshold, for both power density and energy density, for long pulse and CW beams.
- Spectrally flat. Since its absorption remains constant at widely differing wavelengths, this means that sensors based on the LP2 can be used for "white light" or polychromatic beams.
- Very high level of absorption (as high as 96%, depending on wavelength), meaning much less light is scattered back, which for high power beams is an important benefit.
- The absorption is also largely independent of incident angle, which means it can be used for divergent beams too.

What are the advantages of the new LP2 absorber coating vs the previous LP1 coating?

Answer

The new LP2 coating has a number of advantages vs the previous LP1 coating:

Absorber	LP1	LP2
Damage Threshold at 1kW	6 kW/cm²	10 kW/cm²
Damage Threshold at 3kW	2.5 kW/cm²	5 kW/cm²
Damage Threshold at 5kW	2 kW/cm²	2.5 kW/cm²
Pulsed damage threshold for 10ms pulses	160 J/cm²	400 J/cm²
Spectral Absorption	See graphs in technical note
Angle dependence	See graphs in technical note