Description
3S-2IS – Dual Orientation Irradiance Sensor
The 3S-2IS is a high-precision irradiance sensor designed for dual-orientation PV plants. It calculates average irradiance based on the number of panels in each orientation, enabling accurate Performance Ratio (PR) calculations. Users can set the number of panels per orientation for precise results.
Key Features:
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Reference Cell: Monocrystalline silicon (31 mm x 31 mm)
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Irradiance Range: 0–1600 W/m²
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Uncertainty: ≤1.2% (Class A, IEC61724-1)
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Resolution: 0.1 W/m²
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Response Time: 1 second
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Field of View: >160°
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Tilt-Azimuth Accuracy: ≤1°
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Drift: <0.3% per year
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Data Output: RS485, Modbus RTU, 1 reading/sec
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Power Supply: 12–30 V DC | Power Consumption: 25 mA max @24 V DC
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Operating Range: -40°C to +85°C, 0–100% RH
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Sensor Housing: Aluminum, IP54 (IP65/IP68 optional)
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Reference Cell Dimensions: 140 × 110 × 42 mm | Weight: 0.3 kg
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Connected Sensors: Supports two module temperature sensors, one ambient temperature sensor, and one wind speed sensor
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Calibration: Class AAA Sun Simulator as per IEC 60904-2 & IEC 60904-4
Functionality:
The 3S-2IS calculates total effective irradiance and module temperature from connected sensors, sending the data to a datalogger via Modbus RTU. This enables accurate Performance Ratio monitoring in PV plants with multiple panel orientations.
