3S-4IS

3S-4IS

Multi-Orientation Irradiance Sensor

This Irradiance Sensor Model’s designation is 3S-4IS. It is specially developed to calculate the Performance Ratio (PR) for the PV plants with three or four orientations, as it calculates the average irradiance value as per the number of panels in each direction. The user will be able to set the number of panels in each orientation for the correct calculations. The special design of the electronic box used allows simultaneous connection of up to four Irradiance Sensors, up to four Module Temperature Sensors, an Ambient Temperature Sensor, a Wind Speed Sensor, and a Wind Direction Sensor. The number of panels in different directions, to which the sensors are connected, is entered into the electronic box via 3S-4IS Configuration Tool. The total effective irradiance and total effective module temperature can be calculated and communicated to the datalogger via Modbus RTU protocol. By using these values, the accurate Performance Ratio can be calculated in the monitoring systems.

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Description

3S-4IS – Multi-Orientation Irradiance Sensor

The 3S-4IS is a high-precision irradiance sensor system designed for PV plants with three or four panel orientations. It calculates the average irradiance based on the number of panels in each direction, enabling accurate Performance Ratio (PR) calculations. Users can set the number of panels per orientation for precise monitoring.

Key Features:

Electronic Box:

  • Connects up to four irradiance sensors, four module temperature sensors, one ambient temperature sensor, wind speed sensor, and wind direction sensor

  • Data Output: RS485, Modbus RTU, 1 reading/sec

  • Operating Temperature: -40°C to +85°C

  • Material: ABS | Dimensions: 211 × 123 × 60 mm | Weight: 450 g | IP67

  • Power Supply: 12–30 V DC | Power Consumption: 40 mA max @ 24 V DC

  • Cable: 3 m UV and weather-resistant

  • Galvanic Isolation: 1000 V

Irradiance Sensors (3S-IS-mV):

  • Reference Cell: Monocrystalline Silicon (31 × 31 mm)

  • Irradiance Range: 0–1600 W/m²

  • Uncertainty: ≤1.2% (Class A, IEC61724-1)

  • Resolution: 0.1 W/m²

  • Response Time: 1 second

  • Field of View: >160°

  • Tilt-Azimuth Accuracy: ≤1°

  • Drift: <0.3% per year

  • Output: mV signal

  • Cell Temperature Sensor: PT1000 Class A

  • Dimensions: 140 × 110 × 42 mm | Weight: 260 g | Housing: Aluminum | IP54 (IP65/IP68 optional)

  • Calibration: Class AAA Sun Simulator, IEC 60904-2 & 60904-4

Functionality:
The 3S-4IS system calculates total effective irradiance and module temperature from all connected sensors and communicates data to a datalogger via Modbus RTU. This ensures precise Performance Ratio monitoring for PV plants with multiple panel orientations.

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