In this video, we cover what quantum sensors/PAR sensors measure, the original sensors vs. the full-spectrum sensors, the difference between all the models we offer, the output options that are available, and the USB sensors.

VIDEO CONTENT

00:23 QUANTUM SENSORS MEASURE PAR
PAR is photosynthetically active radiation and is defined as equal radiation between 400 and 700 nm. It is measured in units of micro moles per meter squared per second.

00:34 ORIGINAL VS. FULL-SPECTRUM SENSORS
The sensors with the black heads, SQ-100, -200, -300, and -400 series, are the original sensor type and have the original spectral response. The sensors with the gold heads, SQ-500 series, are the full-spectrum sensors and have a wider spectral response. The original sensor cuts off a little bit of the blue and some of the far red above 665, and is calibrated for either sunlight or electric lights. The full-spectrum sensor matches the PAR response more closely and gives more accurate readings for all light sources. For more information on the difference between the two types you can view:

-Bruce Bugbee’s Video: [ Ссылка ]

-Spectral Errors by Light Source webpage: [ Ссылка ]

-Sensor Comparison Chart webpage: [ Ссылка ]

02:33 SQ-100 SERIES
The SQ-100 sensors are original quantum sensors. They are self-powered, meaning you don’t need to add an additional power supply. They have an output of 0 to 800 mV, range of 0 to 4000 µmoles, and calibration factor of 5 µmol m-2 s-1 per mV. The SQ-110 is calibrated for sunlight, SQ-120 for electric lights.

03:24 SQ-200 SERIES
The SQ-200 sensors are original quantum sensors with the following amplified outputs:
-SQ-212 and -220: 0 to 2.5 V
-SQ-215 and -225: 0 to 5 V
-SQ-214 and -224: 4 to 20 mA
The sensors need to powered, anything between 5 and 24 V. The SQ-210s are for sunlight, SQ-220s for electric lights.

4:21 SQ-300 SERIES
The SQ-300 sensors use the original quantum sensors and have multiple sensors spaced along a bar, as follows:
-SQ-313 and -323: 3 sensors spaced over 50 cm
-SQ-316 and -326: 6 sensors spaced over 50 cm
-SQ-311 and -321: 10 sensors spaced over 70 cm
The SQ-310s are for sunlight, SQ-320s for electric lights. The sensors are used anywhere you want spatial average.

05:07 SQ-500 SERIES
The SQ-500 is a full-spectrum sensor with a wider spectral range. This sensor is accurate with all light sources including LEDs, even those narrow bands, to give you accurate PAR readings. The sensor has a signal of 0 to 40 mV and calibration factor of 100 µmol m-2 s-1 giving it an output range of 0 to 4000 µmol m-2 s-1.

05:57 SENSOR COMPARISON TABLE
[ Ссылка ]

06:57 USB SENSORS (SQ-420 and SQ-520)
The SQ-420 and -520 have a USB output that requires a computer or tablet to display the output. The sensors are capable of storing 10,000 measurements after being setup on the computer and connected to a power source. These measurements can be viewed on a CSV file through the ApogeeConnect software by plugging the sensor back into the computer. This sensor is written in open software and we can provide the command codes if needed. The SQ-420 is the original sensor and the SQ-520 is the full-spectrum sensor.

08:12 QUANTUM SENSOR APPLICATIONS
-Greenhouse
-Growth chambers
-Nursery
-Under canopies
-Aquariums
-Indoor agriculture
-Freshwater and ocean undeerwater environments
-Traditional grow lights (metal halide T5, high pressure sodium): Original or Full-spectrum senors
-LED grow lights: Full-spectrum sensors
-Spatial Average: SQ-300 series

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