Description
3S-IS-LR – Low-Cost Irradiance Sensor
The 3S-IS-LR is a cost-effective irradiance sensor designed for residential, rooftop, and small-scale PV plants. It measures solar irradiance (W/m²) using a monocrystalline photovoltaic reference cell and communicates data via Modbus RTU (RS485), enabling performance ratio calculations for small PV systems.
Key Features:
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Economical solution tailored for small-scale applications
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Fast & simple installation with plug-and-play setup
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Similar structure to PV modules for realistic measurements
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SunSpec compliant with remote setup support
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Warranty: 5 years
Technical Specifications:
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Measured Data: Plane of Array Irradiance
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Sensor Type: Silicon Reference Cell (31 × 31 mm)
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Irradiance Range: 0–1600 W/m² | Uncertainty: ≤3%
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Resolution: 0.1 W/m² | Response Time: 1 second
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Drift: <0.3% per year | Field of View: 170°
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Tilt-Azimuth Accuracy: 0°–0°
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Output Rate: 1 reading/sec | Data Output: RS485, Modbus RTU
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Power Supply: 12–30 V DC | Power Consumption: 10 mA max @ 24 V
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Operating Temperature: -40°C to +85°C | Humidity: 0–100% RH
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Housing: ABS, IP67 | Dimensions: 118 × 84 × 55 mm | Weight: 0.2 kg
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Calibration: Tested under natural sunlight using a Fraunhofer ISE reference cell
Applications:
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Residential and rooftop solar PV systems
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Small-scale PV plant performance monitoring
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Cost-effective irradiance measurement for energy yield analysis
