Research grade measurement of photosynthetically active radiation (PAR), ePAR, PPF, and PPFD

Apogee Instruments Quantum sensors are a trusted standard for measuring photosynthetically active radiation by agricultural professionals all over the world. We offer four types of quantum sensors; the Full Spectrum (blue head), the Original (black head), the ePAR (silver head), and a Quantum Light Pollution Sensor (silver head).

 

Our Full-spectrum Quantum Sensors feature an advanced optical detector that provide high-accuracy PAR measurements (400-700 nm) under all light sources, including all modern colored LEDs. Our Original Quantum Sensors feature a less expensive optical detector that is excellent for measuring broadband light sources, but less accurate when measuring certain LED colors.

 

Apogee's new 400-750 nm Extended Photosynthetically Active Radiation (ePAR) sensor is designed for making total photon flux intensity measurements of wider ranges than traditional PAR. Our new Quantum Light-Pollution Sensors are highly sensitive to detect low-level stray photons in the 340-1040 nm range that can disrupt plant dark periods in sensitive plants. Apogee also offers a variety of meters and packages to measure daily light integral (DLI).