Solar Power Meter, Handheld Solar Irradiance Meter Solar Energy Meter, Digital Solar Power Meter with 2000 W/m2, 634 BTU / (ft2 · h) Measuring Range and MAX/MIN/Data Hold Function

I purchased this on the advice of a "biohacker blogger" to test the irradiance of photobiomodulation units. While they aren't meant to be completely accurate, because of the various factors involved in testing, for the price you pay, and the conditions, they do give you a very usable result. They're definitely recommended for the purpose described. Also - when I was having problems with the device, I received a very fast reply from customer services - and several follow ups to make sure that the problem had been solved. I recommend both the product and the company.

Writing this as a physician with over 600 articles on photobiomodulation (PBM) read and over 1500 citations retrieved. This is so far the best meter for measuring irradiance of a device that I have found. There are some limitations or faults in this product to my standards. First, the sensor should have a cap over it to protect it from dust or damage. Like protecting an electric shaver usually comes with a cap. Second, how stupid not to have the irradiance setting remain set (unless changed). I use mW/cm² so I have to select on the TM-206A the W/m². Once I turn off the Tenmars, and then turn it back on, it reverts to BTU. That's not what I would expect. Those are the onlu limitations. Anyone can convert W/m² to mW/cm² by dividing by 10. What would be great is if Tenmars showed the reading of its unit versus the more scientific units sold by Thor Labs ($1492) or Gigahertz-Optik ($3,500). Is there a need for a conversion factor (fudge factor) which often is about 0.5 (0.488 to be exact). Is that needed to be multiplied to the mW/cm² or not? That's the question. One other issue for clarity. The Tenmars has an "R" button that moves the decimal point. If this is set wrong, then the high powered units that read over 200 mW/cm² will show on the monitor, the "OL" or over limit reading. If you have, for example, a reading of 38 W/cm² that should be shown as 038. If you press again, you reduce the upper limit from 1999 to 199 W/cm² This is pertinent only for high power density device testing or testing a solar panel.

Helped me to figure out the issues with solar panel. I used it to monitor solar activity and solar panel performance. One day I found reduced performance of solar panel at the same solar activity.

Bought this tool to try and evaluate positioning of solar panels for installation. Meter was easy to use and gave good readings and helped me evaluate angles of installation for a backyard pergola. Only wish I could correlate meter readings to actual solar panel output. When my solar system is installed I will be able to compare meter readings to actual solar panel output.

Great for readings under 200btus. Anything above reads error

Nice

Trabaja 25 minutos por pila

Works great

Semplice da usare, con custodia

Fonctionne parfaitement et il n'est pas cher.

Versatile and accurate. This is a great product

Funktion wie erwartet

Product came well packed. Instructions were clear, it was easy to use. There is a calibration certificate.