	SP-510 Upward-looking	SP-610 Downward-looking	SP-110 Upward-looking	SP-212 Upward-looking	SP-214 Upward-looking	SP-215 Upward-looking	SP-230 Upward-looking	SP-420 Upward-looking	SP-421 Upward-looking
Power Supply	12 V DC for heater with a current draw of 15.4 mA	12 V DC for heater with a current draw of 15.4 mA	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 15.4 mA	-	-
Output (Sensitivity)	0.057 mV per W m^-2 (variable from sensor to sensor, typical values listed)	0.15 mV per W m^-2 (variable from sensor to sensor, typical values listed)	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 114 mV	0 to 300 mV	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 DC
Calibration Factor (Reciprocal of Output)	17.5 W m^-2 per mV (variable from sensor to sensor, typical values listed)	6.7 W m^-2 per mV (variable from sensor to sensor, typical values listed)	5 W m^-2 per mV	0.5 W m^-2 per mV	125 W m^-2 per mA, 4 mA offset	0.25 W m^-2 per mV	5 W m^-2 per mV	Custom for each sensor and stored in firmware	Custom for each sensor and stored in firmware
Calibration Uncertainty	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %	± 5 %
Measurement Range	0 to 2000 W m^-2 (net shortwave irradiance)	0 to 2000 W m^-2 (net shortwave irradiance)	0 to 2000 W m^-2	0 to 1250 W m^-2	0 to 1250 W m^-2	0 to 1250 W m^-2	0 to 2000 W m^-2	0 to 2000 W m^-2 (net shortwave irradiance)	0 to 1250 W m^-2
Measurement Repeatability	Less than 1 %	Less than 1 %	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	Less than 2 % per year	Less than 2 % per year
Non-linearity	Less than 1 %	Less than 1 %	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 1250 W m^-2	Less than 1 % up to 2000 W m^-2	Less than 1 % up to 1250 W m^-2	Less than 1 % up to 1750 W m^-2	Less than 1 % up to 1750 W m^-2	Less than 1 % up to 1750 W m^-2
Response Time	0.5 seconds	0.5 seconds	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 0.6 s
Field of View	180°	150°	180°	180°	180°	180°	180°	180°	180°
Directional (Cosine) Response	Less than 30 W m^-2 at 80° solar zenith	Less than 20 % for angles between 0 and 60°	± 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	385 to 2105 nm	295 to 2685 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	360 to 1120 nm
Temperature Response	Less than 5 % from -15 to 45 C	Less than 5 % from -15 to 45 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	0.04 ± 0.04 % per C
Zero Offset A	Less than 5 W m^-2; Less than 10 W m^-2 (heated)	Less than 5 W m^-2; Less than 10 W m^-2 (heated)	-	-	-	-	-	-	-
Zero Offset B	Less than 5 W m^-2	Less than 5 W m^-2	-	-	-	-	-	-	-
Operating Environment	-50 to 80 C; 0 to 100 % relative humidity	-50 to 80 C; 0 to 100 % relative humidity	-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
Heater	780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC	780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC	-	-	-	-	0.2 W 15 mA current draw at 12 V DC	-	-
Dimensions	23.5 mm diameter, 28.7 mm height	23.5 mm diameter, 28.7 mm height	24 mm diameter, 28 mm height	24 mm diameter, 28 mm height	24 mm diameter, 28 mm height	24 mm diameter, 28 mm height	24 mm diameter, 28 mm height	24 mm diameter, 28 mm height	24 mm diameter, 28 mm height
Mass (with 5 m of cable)	90 g	100 g	90 g	90 g	140 g	90 g	90 g	90 g	177 g

SP-510
Upward-looking

SP-610
Downward-looking

SP-110
Upward-looking

SP-212
Upward-looking

SP-214
Upward-looking

SP-215
Upward-looking

SP-230
Upward-looking

SP-420
Upward-looking

SP-421
Upward-looking

Power Supply

12 V DC for heater with a current draw of 15.4 mA

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 15.4 mA

Output (Sensitivity)

0.057 mV per W m^-2 (variable from sensor to sensor, typical values listed)

0.15 mV per W m^-2 (variable from sensor to sensor, typical values listed)

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 114 mV

0 to 300 mV

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 DC

Calibration Factor (Reciprocal of Output)

17.5 W m^-2 per mV (variable from sensor to sensor, typical values listed)

6.7 W m^-2 per mV (variable from sensor to sensor, typical values listed)

5 W m^-2 per mV

0.5 W m^-2 per mV

125 W m^-2 per mA, 4 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 %

Measurement Range

0 to 2000 W m^-2 (net shortwave irradiance)

0 to 2000 W m^-2

0 to 1250 W m^-2

0 to 2000 W m^-2

0 to 2000 W m^-2 (net shortwave irradiance)

0 to 1250 W m^-2

Measurement Repeatability

Less than 1 %

Long-term Drift

Less than 2 % per year

Non-linearity

Less than 1 %

Less than 1 % up to 2000 W m^-2

Less than 1 % up to 1250 W m^-2

Less than 1 % up to 2000 W m^-2

Less than 1 % up to 1250 W m^-2

Less than 1 % up to 1750 W m^-2

Response Time

0.5 seconds

Less than 1 ms

Software updates every second

Less than 0.6 s

Field of View

180°

150°

180°

Directional (Cosine) Response

Less than 30 W m^-2 at 80° solar zenith

Less than 20 % for angles between 0 and 60°

± 5 % at 75° zenith angle

Spectral Range

385 to 2105 nm

295 to 2685 nm

360 to 1120 nm

Temperature Response

Less than 5 % from -15 to 45 C

0.04 ± 0.04 % per C

Zero Offset A

Less than 5 W m^-2; Less than 10 W m^-2 (heated)

Zero Offset B

Less than 5 W m^-2

Operating Environment

-50 to 80 C; 0 to 100 % relative humidity

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

Heater

780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC

0.2 W 15 mA current draw at 12 V DC

Dimensions

23.5 mm diameter, 28.7 mm height

24 mm diameter, 28 mm height

Mass (with 5 m of cable)

90 g

100 g

90 g

140 g

90 g

177 g

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

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

$312.00

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