:: Product Information

SP-421 SDI-12 Digital Output Silicon-cell Pyranometer



Input Voltage Requirement                        4.5 to 24 V DC

Current Drain                                                 0.6 mA (quiescent), 1.3 mA (active)

Calibration Uncertainty                               ± 5 %

Measurement Repeatability                      Less than 1 %

Long-term Drift (Non-stability)                  Less than 2 % per year

Non-linearity                                                  Less than 1 % (up to 1750 W m-2)

Response Time                                            0.6 s, time for detector signal to reach 95 % following a step change; fastest data transmission rate for SDI-12 circuitry is 1 s

Field of View                                                  180°

Spectral Range                                             360 to 1120 nm (wavelengths where response is 10 % of maximum)

Directional (Cosine) Response                   ± 5 % at 75° zenith angle

Temperature Response                              0.04 ± 0.4 % per C

Operating Environment                               -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m

Dimensions                                                    44.0 mm height, 23.5 mm diameter

Mass                                                                117 g (with 5 m cable)

Cable                                                               5 m of two conductor, shielded, twisted-pair wire, additional cable available in multiples of 5 m; santoprene rubber jacket (high water resistance, high UV stability, flexibility in                                                                          cold conditions); pigtail lead wires


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