SN-500-SS Specifications Input Voltage Range 5.5 to 16 V DC (heaters are optimized to run at 12 V DC) Current Draw (12 V DC Supply Voltage) Heaters on, communication enabled: 63 mA; Heaters off, communication enabled: 1.5 mA; Heaters off, communication disabled: 0.6 mA Response Time (using SDI-12 Protocol) 1 s (SDI-12 data transfer rate; detector response times are 0.5 s) Heaters (sensors individually heated) 62 mA current drain and 740 mW power requirement at 12 V DC Operating Environment -50 to 80 C; 0 to 100 % relative humidity Dimensions 116 mm length, 45 mm width, 66 mm height Mass 320克（带安装杆和5米的铅线） Cable M8 connector (IP68 rating) to interface to sensor housing, 5 m of four conductor shielded, twisted-pair wire in a santoprene rubber jacket with pigtail lead wires Pyggeometer Specifications Sensitivity 0.12 mV per W mˉ² (variable from sensor to sensor, typical value listed) Calibration Factor (Reciprocal of Sensitivity) 8.5 W mˉ² (variable from sensor to sensor, typical value listed) Calibration Uncertainty ± 5 % Output Ranges -24 to 24 mV 测量范围 -200 to 200 W mˉ² (net longwave irradiance) Measurement Repeatability 不到1% Long-term Drift Less than 2 % change in sensitivity per year Non-linearity 不到1% Detector Response Time Less than 0.5 s Field of View 150 ˚ Spectral Range 5 to 30 µm Temperature Response 不到5％from -15 to 45 C Window Heating Offset 不到10 W mˉ² Zero Offset B Less than 5 W mˉ² Tilt Error Less than 0.5 % Uncertainty in Daily Total ± 5 % Temperature Sensor 30kΩ热敏电阻，25℃±1 C容差 Output from Thermistor 0 to 2500 mV (typical, other voltages can be used) Input Voltage Requirement for Thermistor 2500 mV excitation (typical, other voltages can be used) Pyranometer Specifications Sensitivity 0.057 mV per W mˉ² (upward-looking); 0.15 mV per W mˉ² (downward-looking), (variable from sensor to sensor, typical values listed) Calibration Factor (Reciprocal of Sensitivity) 17.5 W mˉ² per mV (upward-looking); 6.7 W mˉ² per mV (downward-looking) Calibration Uncertainty ± 5 % Output Range 0 to 114 mV (upward-looking); 0 to 300 mV (downward-looking) 测量范围 0 to 2000 W mˉ² (net shortwave irradiance) Measurement Repeatability 不到1% Long-term Drift Less than 2 % per year Non-linearity 不到1% Detector Response Time 0.5 s Field of View 180‰（向上看）;150‰（向下看） Spectral Range 385 nm to 2105 nm (upward-looking); 295 nm to 2685 nm (downward-looking) 定向（余弦）响应 Less than 30 W mˉ² at 80 ˚ solar zenith (upward-looking); Less than 20 % for angles between 0 and 60 ˚ (downward-looking) Temperature Response 不到5％from -15 to 45 C Zero Offset A Less than 5 W mˉ²; Less than 10 W mˉ² (heated) Zero Offset B Less than 5 W mˉ² Uncertainty in Daily Total 不到5％