The Apogee SQ-515-SS Amplified Full-Spectrum Quantum Sensor is a research-grade PAR (Photosynthetically Active Radiation) sensor engineered for accurate PPFD (Photosynthetic Photon Flux Density) measurements across modern lighting technologies, including LEDs, HPS, and sunlight. With a refined spectral response of 389–692 nm, the SQ-515 delivers highly accurate readings in greenhouses, indoor farms, growth chambers, research environments, and aquatic applications.
The sensor features a 0–5 V amplified analog output for easy integration into environmental monitoring and automation platforms such as EnvOS™, PLCs, dataloggers, and greenhouse control systems. Its rugged anodized aluminum housing, self-cleaning acrylic diffuser, and IP68 marine-grade construction provide long-term reliability in harsh indoor and outdoor environments.
Designed for continuous environmental monitoring, the SQ-515 supports applications including:
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Greenhouse light monitoring
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Indoor farming & vertical farming
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DLI (Daily Light Integral) calculations
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Supplemental lighting control
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Growth chamber research
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Under-canopy and reflected PPFD measurements
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Aquatic and aquarium PAR monitoring
Key Features:
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Full-spectrum PAR response optimized for LED grow lights
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0–5 V amplified analog output
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Measurement range up to 4000 µmol m⁻² s⁻¹
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Fast response time (<1 ms)
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IP68-rated weatherproof design
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180° field of view
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Low long-term drift (<2% per year)
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Made in the USA with a 4-year warranty
The SQ-515 is commonly used in precision agriculture and environmental automation systems requiring accurate, stable, and long-term PAR monitoring performance.
