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Enabling better global research outcomes in soil, plant & environmental monitoring.

MQ-200 Portable Separate PAR Meter

The MQ-200 features a handheld meter to display and store measurements with a separate sensor head connected by a 2m long 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 levelling 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.

• Next generation sensor head design
• Excellent cosine response
• Self cleaning dome shaped head
• Sensors are potted solid for extreme conditions
• Also available in multi sensor “line quantum” models for spatially averaged measurements
• Four year warranty

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 levelling 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.

MQ-200 Quantum Separate Sensor with Handheld Meter

Calibration Uncertainty: ± 5%
Measurement Repeatability: < 1%
Non-stability (Long-term Drift): < 2% per year
Non-linearity: < 1% (up to 3000 µmol m-2 s-1 )
Response Time: < 1 ms
Field of View: 180°
Spectral Range: 409 nm to 659 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 30m
Meter Dimensions: 12.6cm length, 7.0cm width, 2.4cm height
Sensor Dimensions: 2.4cm diameter and 2.8cm height
Mass: 180g
Cable: 2m of shielded, twisted-pair wire. Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)
  • AM-320 Saltwater Submersible Sensor Wand
    This accessory incorporates a mounting fixture at the end of a 40 inch (102 cm) segmented fiberglass wand and is well-suited for fresh and saltwater use. The wand unscrews into three sections for easier storage and transport. All radiation sensors are compatible with the wand, which allows the user to place the sensor in hard to reach areas such as in aquarium tanks and greenhouses.