Quantum Separate Sensor with Handheld Meter Apogee Instruments MQ-200

Product Description Apogee quantum sensors measure photosynthetically active radiation. The MQ-200 features a handheld meter to display and store measurements with a separate sensor head connected by a lead. The sensor head features a fully potted, domed-shaped design making it fully waterproof, weatherproof and self-cleaning. The head can be held by hand, mounted to a leveling plate, or attached to an optional sensor wand for taking measurements in hard to reach places. Photosynthetically active radiation ( PAR) , or photosynthetic photon flux ( PPF) , is the spectral range ( wave band) of solar radiation from 400 to 700 nanometers that photosynthetic organisms are able to use in the process of photosynthesis. Gardeners, greenhouse managers, growth chamber users and salt-water aquarists measure PAR to ensure optimal specimen health. Specifications Calibration Uncertainty: ± 5 % Measurement Repeatability: < 1 % Non-stability ( Long-term Drift) : < 2 % per year Non-linearity: < 1 % ( up to 3000 µ mol m-2 s-1 ) Response Time: < 1 ms Field of View: 180° Spectral Range: 410 nm to 655 nm ( wavelengths where response is greater than 50 % of maximum) Directional ( Cosine) Response: 0.06 ± 0.06 % per C Temperature Response: ± 5 % at 75° zenith angle Operating Environment: 0 to 50 C, < 90 % non-condensing relative humidity up to 30 C, < 70 % non-condensing relative humidity from 30 to 50 C, Separate sensors can be submerged in water up to depths of 30 m Meter Dimensions: 12.6 cm length, 7.0 cm width, 2.4 cm height Sensor Dimensions: 2.4 cm diameter and 2.8 cm height Mass: 180 g Cable: 2 m of shielded, twisted-pair wire. Santoprene rubber jacket ( high water resistance, high UV stability, flexibility in cold conditions)