Amplified Sensors
To help satisfy the needs of some of our customers, we offer an amplified version of our pyranometer and quantum sensors. This allows for easy integration into existing systems that are not designed Read more
Differential vs. Single-ended Measurements
Apogee SO series oxygen sensor A couple of years ago, while talking to a customer who had a limited number of input channels on his datalogger, I suggested measuring an oxygen sensor using a Read more
Signal to Noise Ratio
My last blog explained the difference between single-ended and differential measurements. To follow-up, I want to discuss another key concept in the quest to make accurate and consistent measure Read more
The New 400-750 nm ePAR Range Explained
For the last 50 years, the definition of photosynthetically active radiation (PAR) is that it starts at 400 nm, stops at 700 nm, and is equal in between. This has been true since the days of Keith Read more
Daily Light Integral: Measuring Light for Plants
This graph illustrates the year-round variability of global horizontal irradiance at Apogee Instruments in Logan, Utah. As the winter solstice fast approaches, so do the shortened days and Read more
Conversion - UV-A Units
NOTE: This conversion is for UV light in sunlight Conversion for SU-200 series UV-A sensors To convert units, multiply the measurement from the sensor, in units of W m-2, by 3.06 µmol J-1... Read more
Apogee Visits Asia 2024
Apogee Instruments is filled with gratitude after our recent tour of Asia, where we met with our amazing customers, partners, and distributors! A return visit was long overdue, as the last time Apo Read more
Better Know a Distributor - Decagon Devices
The ‘Better Know a Distributor’ series highlights other companies that distribute and resell Apogee products. Apogee Instruments has a long history of working closely with our partner company Decago Read more
SI Radiation Shield
Air temperature is one of the most important environmental measurements and is the most commonly measured parameter on weather stations. Everyone who measures temperature in their yard can claim to ha Read more
Marc van Iersel
The Apogee Instruments-Campbell Scientific Lecture series at Utah State University is honored to host Marc van Iersel for the PSC seminar on Monday, 26 March, 2018 at 3:30 PM at Huntsman Hall, room 27 Read more
Featured Projects - Solar 4R Schools
Our Featured Project series is a new blog series where we highlight what some of our customers are doing with our products. If you have a project you would like to have included please email us at ad Read more
Apogee Visits Asia
In June, key representatives from Apogee paid a long-overdue visit to a few of our partners in China, South Korea, and Japan. Apogee has a long history of selling sensors in Asia, and we were excit Read more
Field of View
Due to recent product development, Apogee now offers three different options in choosing a Field-of-View (FOV ) for the SI-100 series infrared radiometers (IRRs). FOV is reported as the half-angle of Read more
Better Know a Distributor - Campbell Scientific
The ‘Better Know a Distributor’ series highlights other companies that distribute and re-sell Apogee products.Apogee Instruments and Campbell Scientific are more than just neighbors on the same street Read more
Better Know a Distributor - Conviron
The ‘Better Know a Distributor’ series highlights other companies that distribute and resell Apogee products. Conviron has been in business for almost fifty years and is known worldwide for its qualit Read more
Soil Oxygen Concentration - Case Study
Dr. Wendy Yang’s Global Change Ecology Lab, at the University of Illinois at Urbana-Champaign, is currently using the Apogee SO-110 oxygen sensor, with the optional diffusion head, for quasi-continu Read more
New Products: Infrared Radiometer Meter (MI-210) and Ultra-Narrow Infrared Radiometer (SI-131)
Apogee Instruments is pleased to announce the release of our Infrared Radiometer Meter and our Ultra-Narrow Infrared Radiometer. Some of their features and uses are listed below. MI-210 FeaturesThe Read more
Integrators
Apogee's sensors can be found on systems from some of the best integrators and manufacturers in the industry. These companies have discovered our durability, compatibility, and exceptional level of... Read more
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 da Read more
Apogee Oxygen Sensors
Figure 1: Diffusion Head in use We sell two types of oxygen sensors: soil and fast response. The soil sensor is designed for direct burial and includes a diffusion Read more
New Product: Horizontal FOV Infrared Radiometer (SI-1H1)
Apogee Instruments is pleased to announce the release of our horizontal field of view (FOV) infrared radiometer (IRR). Some of the features and uses are listed below. SI-1H1 The SI-1H1 IRR is Read more