The MQ-200X Quantum Meter from Apogee Instruments is a research-grade device designed to accurately measure photosynthetically active radiation (PAR) for plant and environmental studies. Engineered for scientists and professional growers, the meter uses a top-quality PPFD sensor to measure light intensity between 400 and 700 nm, the wavelengths most important for photosynthesis. Just like the brand’s MQ-500 Quantum Meter and DLI-500 Daily Light Integral and Photoperiod Meter, the MQ-200X Quantum Meter from Apogee Instruments is optimized for sunlight, metal halide, and high-pressure sodium lighting, while delivering reliable PAR readings in µmo. The durable aluminum sensor head is fully potted for long-term use in harsh environments, including underwater applications, while the handheld meter provides real-time readings and data logging. The MQ-200X allows users to track light levels, store measurements, and calculate daily light integral (DLI), making it ideal for greenhouses, growth chambers, agriculture, and research applications.