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MQ-200 Quantum Separate Sensor with Handheld Meter

  • Apogee Instruments MQ-200 Quantum Separate Sensor with Handheld Meter
  • Apogee Instruments MQ-200 Quantum Separate Sensor with Handheld Meter
  • Original Quantum Sensor
  • Original Quantum Sensor-Bottom view with included mounting screw. Even with the screw removed, the sensor remains waterproof.
  • Original Quantum Sensor-Back view

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 density (PPFD), 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.


Spec Sheet
Spec Sheet




Calibration Uncertainty:
± 5 %
Measurement Repeatability:
less than 1 %
Non-stability (Long-term Drift):
less than 2 % per year
less than 1 % (up to 3000 µmol m-2 s-1 )
Response Time:
less than 1 ms
Field of View:
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, less than 90 % non-condensing relative humidity up to 30 C, less than 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
180 g
2 m of shielded, twisted-pair wire. Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)
4 years

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