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Low-Cost Irradiance Sensor
The Low-Cost Irradiance Sensor is used to measures the irradiance value for residential and rooftop applications or small-scale projects. The industrial, commercial and utility-scale PV project requires advanced features and high accuracy for meteorological sensors. However, this is not the case for residential and small-scale PV applications. The cost of the sensor should be proportional to scale of the PV system. SEVEN achieved that by Low-Cost Irradiance Sensor. The measured irradiance data are transmitted to monitoring devices, data loggers, and other receiving units via serial RS485 interface with MODBUS RTU protocol.
TECHNICAL DATA
| Item Code | 3S-IS-LR |
| Reference Cell | Monocrystalline Silicon (31 mm x 31 mm) |
| Irradiance Range | 0 – 1600 W/m² |
| Uncertainty | ≤5% |
| Resolution | 0.1 W/m² |
| Drift | Very small drift of <0.3%/ year |
| Output Rate | 1/s |
| Data Output | RS485 up to 38400 Baud |
| Communication Protocol | Modbus RTU |
| Power Supply | 12 to 30 V DC |
| Power Consumption | 10 mA max @24 VDC |
| Electrical Connection | 3 m LIYYC11Y PUR Cable, UV and Weather Resistant |
| Galvanic Isolation | 1000 V between power supply and RS485 bus |
| Box Dimensions | 118 mm x 84 mm x 55 mm (WxLxH) |
| Weight | 300 gr |
| IP Rating | IP67 |
| Sensor Housing Material | ABS |
| Compliant Standard | IEC 61724-1:2021 and IEC 60904 |
| Test | Each sensor is tested under natural sunlight by using a calibrated reference cell from Fraunhofer ISE, Germany |