	SM-500 (PAR)	SM-600 (ePAR)	Temperature	Relative Humidity	CO₂	Barometric Pressure
Calibration Uncertainty	± 5 %	± 5 %	± 0.2 C	± 3 % from 20 to 80 %	± 50 ppm + 2 % of the measured value	-
Long-term Drift (Non-stability)	Less than 2 % per year	Less than 2 % per year	Less than 0.02 C	-	-	-
Measurement Repeatability	Less than 0.5 %	Less than 0.5 %	Less than 0.01 C	-	-	-
Measurement Range	0 to 4000 µmol m^-2 s^-1	0 to 4000 µmol m^-2 s^-1	-60 to 80 C	0 to 95 %	0 to 2000 ppm	70 to 110 kPa
Spectral Range	389 to 692 nm	383 to 757 nm	-	-	-	-
Field of View	180°	180°	-	-	-	-
Directional Response	± 5 % at 75° zenith angles	± 5 % at 75° zenith angles	-	-	-	-
Azimuth Angle	Less than 0.5 %	Less than 0.5 %	-	-	-	-
Tilt Error	Less than 0.5 %	Less than 0.5 %	-	-	-	-
Non-linearity	Less than 1 % (up to 4000 µmol m^-2 s^-1)	Less than 1 % (up to 4000 µmol m^-2 s^-1)	-	-	-	-
Response Time	Less than 1 ms	Less than 1 ms	7 s	-	105 s	-
Temperature Response	-0.11 % ± 0.04 % per C	-0.11 % ± 0.04 % per C	-	-	-	-
Uncertainty in Daily Total	Less than 5 %	Less than 5 %	-	-	-	-
Operating Environment	-40 to 60 C with 0 to 95 % relative humidity	-40 to 60 C with 0 to 95 % relative humidity	-40 to 60 C with 0 to 95 % relative humidity	-40 to 60 C with 0 to 95 % relative humidity	-40 to 60 C with 0 to 95 % relative humidity	-40 to 60 C with 0 to 95 % relative humidity
Aspiration Rate	-	-	7 m s^-1	< 1 m s^-1	< 1 m s^-1	< 1 m s^-1
Housing	White ASA plastic	White ASA plastic	-	-	-	-
IP Rating	IP53	IP53	-	-	-	-
Mass	392 g	392 g	-	-	-	-
Dimensions	105 mm diameter, 157 mm height (4.2 in x 6.2 in)	105 mm diameter, 157 mm height (4.2 in x 6.2 in)	-	-	-	-
Cable	6 conductor, shielded wire with TPR jacket and M8 connector (available in 5, 10, and 20 m lengths; 5V 1A USB power adapter and 5 m USB to M8 connector cable	6 conductor, shielded wire with TPR jacket and M8 connector (available in 5, 10, and 20 m lengths; 5V 1A USB power adapter and 5 m USB to M8 connector cable	-	-	-	-
Input Voltage	5V to 32V	5V to 32V	-	-	-	-
Power Usage	1.1W to 1.5W	1.1W to 1.5W	-	-	-	-
Current Draw	Typical: 92 mA at 12V; Peak: 500 mA at 12V	Typical: 92 mA at 12V; Peak: 500 mA at 12V	Typical: 92 mA at 12V; Peak: 500 mA at 12V	Typical: 92 mA at 12V; Peak: 500 mA at 12V	Typical: 92 mA at 12V; Peak: 500 mA at 12V	Typical: 92 mA at 12V; Peak: 500 mA at 12V
Connectivity	Modbus (RS232 and RS485) and/or Bluetooth	Modbus (RS232 and RS485) and/or Bluetooth	Modbus (RS232 and RS485) and/or Bluetooth	Modbus (RS232 and RS485) and/or Bluetooth	Modbus (RS232 and RS485) and/or Bluetooth	Modbus (RS232 and RS485) and/or Bluetooth
Data Storage Capacity	9 months of 1 min data	9 months of 1 min data	9 months of 1 min data	9 months of 1 min data	9 months of 1 min data	9 months of 1 min data
Warranty	4 years against defects in materials and workmanship	4 years against defects in materials and workmanship	-	-	-	-

SM-500 (PAR)

SM-600 (ePAR)

Temperature

Relative Humidity

CO₂

Barometric Pressure

Calibration Uncertainty

± 5 %

± 0.2 C

± 3 % from 20 to 80 %

± 50 ppm + 2 % of the measured value

Long-term Drift (Non-stability)

Less than 2 % per year

Less than 0.02 C

Measurement Repeatability

Less than 0.5 %

Less than 0.01 C

Measurement Range

0 to 4000 µmol m^-2 s^-1

-60 to 80 C

0 to 95 %

0 to 2000 ppm

70 to 110 kPa

Spectral Range

389 to 692 nm

383 to 757 nm

Field of View

180°

Directional Response

± 5 % at 75° zenith angles

Azimuth Angle

Less than 0.5 %

Tilt Error

Less than 0.5 %

Non-linearity

Less than 1 % (up to 4000 µmol m^-2 s^-1)

Response Time

Less than 1 ms

7 s

105 s

Temperature Response

-0.11 % ± 0.04 % per C

Uncertainty in Daily Total

Less than 5 %

Operating Environment

-40 to 60 C with 0 to 95 % relative humidity

Aspiration Rate

7 m s^-1

< 1 m s^-1

Housing

White ASA plastic

IP Rating

IP53

Mass

392 g

Dimensions

105 mm diameter, 157 mm height (4.2 in x 6.2 in)

Cable

6 conductor, shielded wire with TPR jacket and M8 connector (available in 5, 10, and 20 m lengths; 5V 1A USB power adapter and 5 m USB to M8 connector cable

Input Voltage

5V to 32V

Power Usage

1.1W to 1.5W

Current Draw

Typical: 92 mA at 12V; Peak: 500 mA at 12V

Connectivity

Modbus (RS232 and RS485) and/or Bluetooth

Data Storage Capacity

9 months of 1 min data

Warranty

4 years against defects in materials and workmanship