User Manual

SENSOR MODELS
This manual covers the unamplified models SQ-100 series and SQ-300 series. Additional models are covered in
their respective manuals.
Line quantum sensors, SQ-300 series, provide spatially averaged PPFD measurements. All sensors along the length
of the line are connected in parallel, and as a result, Apogee line quantum sensors output a single voltage signal
that is directly proportional to PPFD averaged from the location of the individual sensors.
Model
Signal
Calibration
SQ-110
Self-powered
Sunlight
SQ-120
Self-powered
Electric light
SQ-311
Self-powered
Sunlight
SQ-321
Self-powered
Electric light
SQ-313
Self-powered
Sunlight
SQ-323
Self-powered
Electric light
SQ-316
Self-powered
Sunlight
SQ-326
Self-powered
Electric light
SQ-212
0-2.5 V
Sunlight
SQ-222
0-2.5 V
Electric light
SQ-214
4-20 mA
Sunlight
SQ-224
4-20 mA
Electric light
SQ-215
0-5 V
Sunlight
SQ-225
0-5 V
Electric light
SQ-420
USB
Sunlight and Electric light
SQ-421
SDI-12
Sunlight and Electric light
SQ-422
Modbus
Sunlight and Electric light
Sensor model number and serial number are located
near the pigtail leads on the sensor cable. If you
need the manufacturing date of your sensor, please
contact Apogee Instruments with the serial number
of your sensor.
SQ-311/321
SQ-110/SQ-120
SQ-313-323
SQ-316/326