	SP-110	SP-212	SP-214	SP-215	SP-230	SP-420	SP-421
Power Supply	Self-powered	3.3 to 24 V DC; current draw 10 µA	7 to 24 V DC, maximum current draw of 22 mA (2 mA quiescent current draw)	5.5 to 24 V DC; current draw 10 µA	12 V DC for heater with a current draw of 15 mA	-	-
Output (Sensitivity)	0.2 mV per W m^-2	2 mV per W m^-2	0.008 mA per W m^-2	4 mV per W m^-2	0.2 mV per W m^-2	-	-
Output Type	0 to 400 mV	0 to 2.5 V	4 to 20 mA	0 to 5 V	0 to 400 mV	USB	SDI-12
Resolution	-	-	-	-	-	0.1 W m^-2	-
Digital Input Voltage	-	-	-	-	-	-	5.5 to 24 V
Calibration Factor (Reciprocal of Output)	5 W m^-2 per mV	0.5 W m^-2 per mV	125 W m^-2 per mA, 4.0 mA offset	0.25 W m^-2 per mV	5 W m^-2 per mV	Custom for each sensor and stored in firmware	-
Calibration Uncertainty	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %
Measurement Repeatability	Less than 1 %	Less than 1 %	Less than 1 %	Less than 1 %	Less than 1 %	Less than 1 %	Less than 1 %
Long-term Drift	Less than 2 % per year	Less than 2 % per year	Less than 2 % per year	Less than 2 % per year	Less than 2 % per year	Less than 2 % per year	Less than 2 % per year
Non-linearity	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 2000 W m^-2
Response Time	Less than 1 ms	Less than 1 ms	Less than 1 ms	Less than 1 ms	Less than 1 ms	Software updates every second	Less than 0.5 s
Field of View	180°	180°	180°	180°	180°	180°	180°
Spectral Range	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm
Directional (Cosine) Response	± 5 % at 75° zenith angle	± 5 % at 75° zenith angle	± 5 % at 75° zenith angle	± 5 % at 75° zenith angle	± 5 % at 75° zenith angle	± 5 % at 75° zenith angle	± 5 % at 75° zenith angle
Spectral Range	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm	360 to 1120 nm
Temperature Response	0.04 ± 0.04 % per C	0.04 ± 0.04 % per C	0.04 ± 0.04 % per C	0.04 ± 0.04 % per C	0.04 ± 0.04 % per C	0.04 ± 0.04 % per C	0.04 ± 0.04 % per C
Operating Environment	-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m	-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m	-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m	-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m	-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m	-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m	-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m
Dimensions	24 mm diameter; 33 mm height	24 mm diameter; 33 mm height	24 mm diameter; 33 mm height	24 mm diameter; 33 mm height	24 mm diameter; 33 mm height	24 mm diameter; 33 mm height	24 mm diameter; 44 mm height
Mass (with 5 m of cable)	90 g	90 g	140 g	90 g	90 g	90 g	177 g

Power Supply

Self-powered

3.3 to 24 V DC; current draw 10 µA

7 to 24 V DC, maximum current draw of 22 mA (2 mA quiescent current draw)

5.5 to 24 V DC; current draw 10 µA

12 V DC for heater with a current draw of 15 mA

Output (Sensitivity)

0.2 mV per W m^-2

2 mV per W m^-2

0.008 mA per W m^-2

4 mV per W m^-2

0.2 mV per W m^-2