Apogee Instruments MQ-500 - professional PAR/PPFD metre

Product detailed description

MQ-500 from the American manufacturer Apogee Instruments is a handheld light metre with a connected cable that displays and stores measurement results. Its main use includes measuring direct and reflected PPFD above plant canopies or within foliage at various heights in outdoor greenhouses or indoor growing rooms. Quantum sensors can also measure PAR/PPFD in aquarium environments, including saltwater aquariums where corals grow.

The metre has manual and logging modes and records the integrated daily total in mol × m^(-2) × d^(-1). The sample mode stores up to 99 measurements. The logging mode switches the device on and off every 30 minutes to take a reading. Every 30 minutes, the device averages 60 thirty-second measured values and stores this value in memory. Up to 99 such values can be stored, and once the memory capacity is full, the oldest records are automatically overwritten by newly taken ones. The integrated daily total is taken from 48 averaged measurements (which makes a 24 h period). Manual and logging measurements can be displayed on the LCD screen or downloaded to a computer; however, the integrated daily total can only be displayed by downloading the data to a computer. For this, you need to purchase the AC-100 communication cable (a standard USB cable will not work) and ApogeeAMS software.

• measurement of incoming PPFD (photosynthetic photon flux density = the amount of PAR received by the plant from the lighting). Compared with classic LUX metres, it can be used for measuring LED lighting, where PAR and PPFD values play a crucial role!

Specifications:

• calibration deviation: ± 5 %
• measurement range: 0 - 4000 µmol × m^(-2) × s^(-1)
• measurement repeatability: < 0.5 %
• long-term degradation of measurement accuracy: < 2 % per year
• non-linearity: < 1 % (up to 4000 µmol × m^(-2) × s^(-1))
• response time: < 1 ms
• field of view: 180°
• light spectrum range: 389 - 692 nm ± 5 nm (wavelengths where the response is greater than 50% of the maximum)
• spectral selectivity: < 10 % from 412 to 682 nm ± 5 nm
• directional (cosine) response: ± 5% at 75° zenith angle
• azimuth error: < 0.5 %
• tilt error: < 0.5 %
• temperature response: -0.11 ± 0.03 % C^(-1)
• uncertainty of measurement in the daily total: < 5 %
• probe: improved blue silicon photodiode
• housing: anodised aluminium body with acrylic diffuser
• fully dustproof and waterproof (IP68)
• operating environment: 0 - 50 °C (at max 90 % RH up to 30 °C, at 70 % RH up to 50 °C); the separate sensor can be submerged to a depth of up to 30 metres
• device dimensions (l×w×h): 126 × 70 × 24 mm
• probe dimensions: O 24 mm, 37 mm length
• weight: 100 g (including 5 m cable)
• cable: 2 m shielded, twisted-pair conductor, additional cable available, TPV rubber
• warranty: 4 years against defects in materials and workmanship
• made in the USA