The SPN1 Sunshine Pyranometer is a precision solar radiation measurement instrument with a ground glass dome, and is designed for long-term outdoor exposure. It is an affordable and effective alternative to shade-ring pyranometers, pyrheliometers and traditional sunshine recorders.

Specification

For simultaneous outputs of total radiation, diffuse radiation and sunshine status.

Overall accuracy: Total (Global) and Diffuse radiation	±5% Daily integrals ±5% ±10 W.m-2 Hourly averages ±8% ±10 W.m-2 Individual readings
Resolution	0.6 W.m-2 =0.6 mV
Range	0 to >2000 W.m-2
Analogue output sensitivity	1 mV=1 W.m-2
Analogue output range	0 – 2500 mV
Sunshine status threshold	120 W.m-2 in the direct beam

 

Accuracy: Sunshine status	±10% sun hours with respect to the threshold
Accuracy: Cosine correction	±2% of incoming radiation over 0-90° Zenith angle
Accuracy: Azimuth angle	±5% over 360° rotation
Temperature coefficient	0.02% per °C (typical)
Temperature range	-40 to + 70°C
Stability	Recalibration recommended every 2 years
Response time	100 ms (typical)
Spectral response	400 – 2700 nm
Spectral sensitivity variation	10% (typical)
Non-linearity	< 1%
Tilt response	Negligible
Zero offsets	< 3 W.m-2 for a change of 5°C/hr in ambient temperature < 3 W.m-2 dark reading
Latitude capability	-90° to + 90°
Environmental sealing	IP67
Sunshine status output	No sun=open circuit Sun=short circuit to ground
Power requirement	2 mA (awake ), <30 µA (asleep) 5 V – 15 V DC
Heater power	12 V – 15 VDC, up to 1.5 A
RS232 connector	5-pin M12
Signal output & power-in connector	8 pin M12
Mounting options	3 x M5 tapped holes in base at 108 mm dia, 120° spacing
Size & Weight	126 mm dia. x 94 mm high, 786g

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