This manual covers the USB quantum sensor model SQ-420. Additional models are covered in their respective manuals. Model Signal Calibration Sunlight and Electric SQ-420 USB light SQ-110 Self-powered Sunlight SQ-120 Self-powered Electric 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 SQ-215 0-5 V Sunlight SQ-225 0-5 V 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 Sunlight and Electric SQ-421 SDI-12 light Sunlight and Electric SQ-422 Modbus light SQ-420 Resolution 0.1 µmol m-2 s-1 Calibration Factor Custom for each sensor and stored in the firmware Calibration Uncertainty ± 5 % (see calibration Traceability below) Measurement Less than 0.5 % Repeatability Long-term Drift Less than 2 % per year (Non-stability) Non-linearity Less than 1 % (up to 4000 µmol m-2 s-1) Response Time Software updates every second Field of View 180° 410 to 655 nm (wavelengths response is greater than 50 % of Spectral Range maximum; see Spectral Response below) Spectral Selectivity Less than 10 % from 469 to 655 nm Directional (Cosine) ± 5 % at 75° zenith angle (see Cosine Response below) Response
This manual covers the USB quantum sensor model SQ-420. Additional models are covered in their respective manuals. Model Signal Calibration SQ-420 USB Sunlight and Electric light SQ-110 Self-powered Sunlight SQ-120 Self-powered Electric 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 SQ-215 0-5 V Sunlight SQ-225 0-5 V 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-421 SDI-12 Sunlight and Electric light SQ-422 Modbus Sunlight and Electric light SQ-420 Resolution 0.1 µmol m-2 s-1 Calibration Factor Custom for each sensor and stored in the firmware Calibration Uncertainty ± 5 % (see calibration Traceability below) Measurement Repeatability Less than 0.5 % Long-term Drift (Non-stability) Less than 2 % per year Non-linearity Less than 1 % (up to 4000 µmol m-2 s-1) Response Time Software updates every second Field of View 180° Spectral Range 410 to 655 nm (wavelengths response is greater than 50 % of maximum; see Spectral Response below) Spectral Selectivity Less than 10 % from 469 to 655 nm Directional (Cosine) Response ± 5 % at 75° zenith angle (see Cosine Response below)
SQ-420.docx