2
USING APOGEE QUANTUM SENSORS WITH ZENTRA SYSTEM
1. INTRODUCTION
The SQ-521 Full-Spectrum Quantum sensor from Apogee Instruments, Inc. is a high-
accuracy, single-band radiometer designed for continuous measurement of photosynthetic
photon flux density (PPFD) or photosynthetically active radiation (PAR) measurement in
indoor or outdoor environments. The Apogee Full-Spectrum Quantum sensor has nearly
equal sensitivity across the spectral range from 389–692 nm (PAR band is 400–700 nm)
and is therefore a good choice for both above- and below-canopy measurement in outdoor
environments and also for indoor environments, where artificial light sources are used.
The information in this document explains how to install the required hardware to mount
Apogee SQ-521 sensors that have been preconfigured by METER Group to work seamlessly
with METER ZENTRA series data loggers. Details of how the ZENTRA system handles the
data are also included. Please read this document carefully in its entirety before going out to
the field.
For more information on the Apogee Full-Spectrum Quantum Sensor, please review the
on the
(apogeeinstruments.com/
sq-521-ss-sdi-12-digital-output-full-spectrum-Quantum-sensor).
2. INSTALLATION
Follow the steps listed in
to install Apogee sensors in the field. A cable, mounting
bracket, leveling plate, and screws are included with the sensor. Other tools will need to be
provided.
Table 1 Installation
Tools Needed
Wrench 13 mm (0.5 in)
Flathead screwdriver
Mounting post 33.0 to 53.3 mm (1.3 to 2.1 in) diameter post, pole, tripod,
tower, or other similar infrastructure that extends above the canopy
Mounting b leveling plate Model AL-120
Nylon screw #10-32 x 3/8 in (included)
METER ZENTRA series data logger ZL6 or EM60
METER ZSC Bluetooth
®
Sensor Interface (optional)
METER ZENTRA software ZENTRA Utility, ZENTRA Utility Mobile, or
ZENTRA Cloud
Содержание APOGEE SQ-521
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