Seven Sensor Advanced Irradiance Sensor 3S-IS+

Seven Sensor 3S-IS+ is an Advanced Class A irradiance sensor designed for photovoltaic power plants. It measures solar irradiance falling on the PV panel in W/m² and helps you monitor the performance of the power plant. Thanks to its modular structure, you can directly connect module temperature, ambient temperature, wind speed & direction, relative humidity, and pressure sensors to it. All measured data is transmitted to receiver units via Modbus RTU.

Why Choose 3S-IS+ Advanced Irradiance Sensor?

• Class A accuracy. Compliant with IEC 61724-1, with an uncertainty of less than 1%. Each sensor is calibrated with a reference cell calibrated by the ISFH Institute in Germany and under a Class AAA solar simulator.
• Modular design. By adding module temperature, ambient temperature, wind, humidity, and pressure sensors to a single main unit, you can build a complete weather station in the field.
• Speaks the same language as the panel. The reference cell has a similar structure to a PV panel and responds to light in the same way as the panels.
• Fast data. Response time is one second and can be reduced to 500 ms on demand.
• Easy multi-connection. Thanks to the termination resistor that you can turn on and off via the GUI, you can quickly establish daisy chain connections without additional hardware.
• Designed for field use. The glass fiber reinforced, UV-resistant ASA housing and UV-resistant PUR cable withstand harsh outdoor conditions.
• Long-lasting reliability. Comes with SunSpec compliance, galvanic isolation, free software updates, and a 5-year warranty.