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

OverStock - Environmental

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

  • Vendor:Apogee Instruments Inc.

Availability: Available Item
$525.00

Overview

The SP-421 is a digital sensor with SDI-12 communication protocol. The sensor incorporates a silicon-cell photodiode with a rugged, self-cleaning sensor housing design, and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers.

Typical applications include shortwave radiation measurement in agricultural, ecological, and hydrological weather networks. Sensors are also used to optimize photovoltaic systems.

Sensor includes IP68 marine-grade stainless-steel cable connector to simplify sensor removal and replacement for maintenance and recalibration.

Get more information on user manual and Specification Sheet

ISO 9060:2018 Class C (fast response)
Input Voltage Requirement 5.5 to 24 V DC
Current Drain 1.5 mA (quiescent), 1.9 mA (active)
Output Range 0 to 2000 W mˉ²
Calibration Uncertainty at 1000 W mˉ² Less than 3%
Measurement Repeatability Less than 1 %
Non-stability (Long-term Drift) Less than 2 % per year
Non-linearity Less than 1 % (up to 2000 W mˉ²)
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 30.5 mm diameter, 37 mm height
Mass (with 5 m of cable) 140 g
Cable 5 m of two conductor, shielded, twisted-pair wire, additional cable available in multiples of 5 m
TPR jacket (high water resistance, high UV stability, flexibility in cold conditions)
pigtail lead wires