Seven Radiation Sensor – Modbus RTU Output

Irradiance Sensor With Modbus RTU Output

It's a Sensor Box for Solar PV Plants having a Modbus RTU Output. Besides Irradiance Sensor, it includes also an Internal Cell Temperature Sensor.It is compatible with all Modbus RTU Dataloggers. It is supplied along with Mounting Bracket and Cable. Solar irradiance is the power per unit area received from the sun and measured by the PV pyranometer, i.e. the irradiance sensor, as electromagnetic radiation in Watt per square meter (W/m²).

WORKING PRINCIPLES

This sensor consists of a solar cell made of monocrystalline silicon, which is activated by light and produces an electric current that is converted into millivolts (mV) thanks to the connected shunt resistor on its back side. A temperature sensor is located at the back of the cell to measure the temperature of the cell which causes a small deflection of the current. The temperature increases in inverse proportion to the current production of the cell. The monocrystalline cell and the temperature sensor are connected to an electronic card, which is designed to calculate the temperature compensated solar irradiance value in W/m². Thanks to the design of this card, it is possible to connect up to 7 different sensors and provides an RS485 port for data transfer in Modbus RTU protocol. SEVEN provides SunSpec compliance for the necessary devices, too.

CONSTRUCTION FEATURES

Monocrystalline Cell: The cell is laminated with 2 EVA sheets, one Tedlar sheet and 3mm tempered glass under 180 °C homogeneous temperature and under vacuum effect. The size of the monocrystalline cell is 52×52 mm² or 31x31mm².

Sensor Box: It is an UV protected aluminum box. The sensor box has two opening access and the mounting holes on its sides are for easy site installation. There are three options for IP Class; IP54, IP65 and IP68. For ventilation purpose, there are 1mm holes at bottom side of the box, or a ventilation plug on its side.

Connectors: Each plastic connector which is UV protected has a different pin number which prevents any connection confusion during site installation. The connection cables are delivered as 1,5m or 3m lengths. SEVEN irradiance sensor is designed as plug & run device and end user friendly operation.

Details of SEVEN Irradiance sensor

The irradiance sensor or PV pyranometer is a photovoltaic sensor used to measure the amount of solar energy in natural light and is particularly used in meteorology. It measures the power of total solar radiation in watts per square meter (W/m²).

The solar irradiance sensor is a simple economical solution to monitor the performance of the solar system at any time. Entirely manufactured as a cell for the PV system and equipped with a temperature compensation system, the irradiance sensor measures precisely and reliably the energy expected to be produced by the system. You will thus be able to benefit from the best performance for your solar panels.