FieldMaxII TOFieldMaxII TO
FieldMaxII TO


Laser Power Meter (RoHS)

Key Features:

  • Large, bright, backlit LCD display
  • Digital accuracy with analog-like movement for laser tuning
  • Works with thermopile and optical sensors only
  • USB computer interface with complete host control capability (Windows Vista and Windows 7 [32 and 64 bit] compatible)
  • Analog output with selectable full-scale voltage (1,2, and 5V)
  • Rechargeable battery included
  • RoHS compliant


Part Name Description
1098579 FieldMaxII-TO Laser power meter (RoHS compliant)

The FieldMaxII-TO laser power meter functions with a broad range of thermopile and optical sensors. Together, these sensors enable FieldMaxII-TO to measure UV, visible, and IR laser output from the nanowatt to the kilowatt range, and to work with CW and pulsed lasers.

The updated FieldMaxII-TO (RoHS) system features an enhanced PC applications software package that provides live simultaneous monitoring and control of multiple meters from a single host computer. This software provides a quick and easy way to use your PC to monitor live data and statistics, log data to a file, plot the data in trend and histogram charts, and tune lasers with a simulated analog needle.

The meter also contains an analog output and rechargeable battery. This combination of features makes FieldMaxII-TO the most powerful and versatile laser meter in its price range.

More Information

This general-purpose laser power meter is designed to accommodate a broad range of users, including developers, production testers, service engineers and general scientific users. Field service applications will benefit from the meter’s small size, rechargeable battery pack, and responsive tuning indicator for peaking laser output. For general laboratory use, the FieldMaxII offers versatility, accuracy, and easy access to statistics and features, such as wavelength compensation and attenuation correction.

The rechargeable battery pack is recharged through an internal charger in the FieldMaxII unit. This internal charger is powered by the FieldMaxII AC adapter. Whenever the AC adapter is in use, the battery pack is being charged.

FieldMaxII incorporates what is known as a “smart charge” circuitry. This circuitry measures the condition of the battery pack and decides if it should be fast-charged, top-off charged, or trickle charged. This capability keeps the battery pack from being damaged by overcharging and speeds the process of recharging when the battery is drained.

The meter can also be powered by six standard AA batteries.


This current version of the Setup file contains updated and improved 32-bit and 64-bit Windows XP and Windows 7 drives. This update includes:

  • Improved compatibility with National Instruments LabView in 64-bit environments
  • Faster FieldMax PC application startup within Windows 7
  • Several bug fixes including an auto-range timeout error that affected some customers using remote PC control

Max. Measurable Power (with thermopile sensor) 30.0 kW
Max. Measurable Power (with optical sensor) 300.0 mW
Min. Measurable Power (with thermopile sensor) 10 µW
Min. Measurable Power (with optical sensor) 1 nW
Displayable Full-Scale Power Ranges (with thermopile sensor) 3.000 mW to 30.00 kW (auto or manual ranging, selectable)
Displayable Full-Scale Power Ranges (with optical sensor) 3.000 µW to 300.0 mW (auto or manual ranging, selectable)
Measurement Resolution 0.1% of full scale
Power Sampling Rate 10 Hz
Accuracy - Digital Meter ±1.0% of reading
Accuracy - System Meter accuracy + sensor accuracy
Drawing Packages
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