Comparisons in Quantum Sensor Output for Different Light Sources
Since 1972 when a scientist named Keith McCree demonstrated that counting photons in the photosynthetically active range (400 to 700 nm) would better predict photosynthesis than the measurement of foot-candles, the quantum sensor has been used to m…
Long-term drift: When is recalibration warranted?
I went to my dentist yesterday morning for a 6-month cleaning and check-up. Since I have had no special dental problems for several years, I quizzed him about the need for inspections every 180 days. He replied with an eloquent summary of the mic…
Apogee's Origin Story
I started working in graphic design and marketing at Apogee in June of 2010. I love the feel of working for a small business. I enjoy seeing how my work directly helps our customers. I have worked here for over a year, and I wanted to learn more ab…
Meter Guidelines
The latest version of our meter has been out for 3 years. Based on customer feedback I have compiled this list of ways to use it more effectively.
Battery Life/Master reset
The meter display is the biggest draw on the battery.…
Why Silicon-cell Pyranometers are the best choice for monitoring PV panels
Sensors that measure the available solar energy, pyranometers, are an excellent way to monitor the performance of solar photovoltaic panels. They can indicate changes in panel efficiency over time (80% of initial output after 25 years for crystalli…