Apogee SP-522

Apogee · Thermopile Pyranometer · SP-522

Manufacturer: Apogee
Product: Thermopile Pyranometer
Model: SP-522
Protocol: Modbus
Package: Sensors (SU2202)
Updated: 2026-05-28
Driver ID: 152

Notes

The SP-522-SS is an upward-looking thermopile pyranometer with a digital signal using Modbus RTU protocol over RS-232 or RS-485. The sensor incorporates a blackbody thermopile detector and acrylic diffuser with a rugged, self-cleaning sensor housing design, and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers.

Connections:
Red -> +12-24VDC
BLACK -> 0V
GREEN -> 0V
BLUE -> D0
WHITE -> D1

Registers 5

#	Name	Unit
1	Solar Radiation	`W/m²`
2	Raw millivolt	`mV`
3	Sensor temperature (external)	`°C`
7	Heater	`on/off`
8	Dewpoint (external)	`°C`

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