Apogee Instruments SQ-520 - PAR/PPFD measuring probe

Product detailed description

The SQ-520 probe can be connected directly to a computer via a USB cable for point or graph and log PPFD measurement(photosynthetic photon flux density = the amount of PAR received by the plant from the lighting) in real time using the included software.
At the same time, it can also serve as a standalone logging unit by simply connecting it to a standard 5 V DC USB adapter. The internal memory inside the probe has a capacity of 10,000 user-specified periodic measurements with the option to save in CSV format.

Incoming PPFD measurement. Compared with classic LUX metres, it can be used for measuring LED lighting, where PAR and PPFD values play a crucial role!

Specifications:
- resolution: 0.1 µmol × m^(-2) × s^(-1)
- calibration factor: individual for each probe; stored in firmware
- calibration deviation: ± 5 %
- measurement repeatability: < 1 % up to 4000 µmol × m^(-2) × s^(-1)
- long-term degradation of measurement accuracy: < 2 % per year
- non-linearity: < 1 % (up to 4000 µmol × m^(-2) × s^(-1))
- response time: software updates every second
- 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 daily total: < 5 %
- probe: improved blue silicon photodiode
- housing: anodised aluminium body with acrylic diffuser
- fully dust and water resistant (IP68)
- operating environment: -40 - 70 °C; 0 - 100 % RH;
- standalone sensors can be immersed to a depth of up to 30 metres
- dimensions: O 24 mm, 37 mm length
- USB cable: 4.6 m
- probe weight: 90 g
- current draw: 61 mA
- warranty: 4 years against defects in materials and workmanship
- made in the USA