The MQ-610 ePAR Quantum Meter, designed by Apogee Instruments under the guidance of Dr. Bruce Bugbee, is a top-tier tool for accurately measuring the extended photosynthetically active radiation (ePAR) range from 400 to 750 nm. Ideal for scientists and serious growers, it ensures precise light measurement for optimal plant growth.

• New ePAR Range: Measures the newly defined 400-750 nm ePAR, including far-red photons (700-750 nm).

• Quality ePAR Meter: Laboratory-grade ePPFD optical detector calibrated for various light sources.

• Extremely Accurate & Stable: Provides precise readings with less than 5% uncertainty and minimal accuracy drift.

• Three Measurement Modes: Spot, sample, and log modes for versatile data recording.

• Rugged & Ready to Use: Durable sensor head suitable for harsh environments, including underwater.

• Calibration Uncertainty: ± 5 %

• Measurement Range: 0 to 4000 µmol m-2 s-1

• Measurement Repeatability: Less than 0.5 %

• Long-term Drift (Non-stability): Less than 2 % per year

• Non-linearity: Less than 1 % (up to 4000 µmol m-2 s-1)

• Response Time: Less than 1 ms

• Field of View: 180°

• Spectral Range: 400 to 750 nm ± 5 nm (wavelengths where response is greater than 50 %)

• Directional (Cosine) Response: ± 2 % at 45° zenith angle, ± 5 % at 75° zenith angle

• Azimuth Error: Less than 0.5 %

• Tilt Error: Less than 0.5 %

• Temperature Response: -0.11 ± 0.04 % per C

• Uncertainty in Daily Total: Less than 5 %

• Housing: Anodized aluminum body with acrylic diffuser

• IP Rating: IP68

• Operating Environment: -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m

• Meter Dimensions: 126 mm length, 70 mm width, 24 mm height

• Sensor Dimensions: 30.5 mm diameter, 37 mm height

• Mass (with 5 m of cable): 140 g

• Cable: 2 m of two conductor, shielded, twisted-pair wire; additional cable available; TPR jacket

• Warranty: 4 years against defects in materials and workmanship