Apogee Instruments MQ-650 Underwater Quantum PAR Meter
Key Features
✔ Full-Spectrum Accuracy
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Measures PAR (400-700 nm) under all light sources (LEDs, MH, T5)
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±5% spectral error (vs. NIST standards)
✔ Aquatic-Grade Durability
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Waterproof sensor & cable (IP68 rated)
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Anodized aluminum body with acrylic diffuser
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Rated for saltwater/marine use
✔ Scientific-Grade Performance
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Blue-enhanced silicon photodiode
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Custom optical filters match plant response
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0-3,000 μmol/m²/s range
Technical Specifications
Sensor:
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Depth Rating: 10m continuous submersion
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Cable Length: 2m (submersible)
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Response Time: <1 ms
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Calibration: Cosine-corrected
Meter (Non-Waterproof):
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Display: 3.5-digit LCD
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Battery: 9V (50+ hrs runtime)
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Operating Temp: 0-50°C
Accuracy:
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±5% (LED)
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±3% (sunlight)
Aquatic Applications
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Coral reef lighting optimization
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Aquaculture phytoplankton studies
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Seaweed/algae production
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Aquarium light validation
What’s Included
✓ Underwater quantum sensor
✓ Handheld meter
✓ 9V battery
✓ Calibration certificate
Weight: 850g (total package)
Note: Meter must remain dry – use sensor cable to suspend in wet areas