Class A pyranometer 3S-IS-T-V

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Overview
This irradiance sensor is designed for measuring radiation flux density in solar PV plants. It integrates a PT1000 cell temperature sensor and is supplied with a mounting bracket and cable for straightforward installation. The model provides an analog 0–1.5 V output and is compatible with SolarEdge Gateway and other dataloggers supporting 0–2 V inputs.

How the 3S-IS-T-V Sensor Works

• A monocrystalline silicon reference cell absorbs sunlight and generates current.
• A precision shunt resistor converts the cell current into a voltage proportional to irradiance.
• The PT1000 temperature sensor on the back of the cell compensates temperature-related deviations.
• An electronic board processes signals and computes temperature-compensated irradiance values in W/m².
• Processed data are transmitted via an analog 0–1.5 V output for connection to PLCs, SCADA or dataloggers.

Key Benefits

• Measurement traceability: IEC 61724-1 Class A compliance with uncertainty ≤1% and calibration per IEC 60904-2.
• Fast response: typical 1 s response time (500 ms option available) for near real-time decisions.
• Field-ready design: UV-protected aluminum housing (IP54) with IP65/IP68 options for harsher environments.
• Easy integration: supplied with mounting bracket and 3 m LIYYC11Y PUR cable; plug‑and‑play with analog-capable systems.
• Low maintenance: low drift and robust calibration method reduce recalibration and replacement frequency.

Technical specifications

• Item code: 3S-IS-T-V
• Reference cell: Monocrystalline silicon (31 mm × 31 mm)
• Current shunt: High-precision shunt resistor soldered to cell terminals
• Irradiance range: 0 – 1500 W/m²
• Uncertainty: ≤1% (IEC 61724-1 Class A)
• Resolution: 0.1 W/m² to 1 W/m² (per IEC 61724-1 Class A)
• Response time: typically 1 s (less than 3 s per IEC 61724-1 Class A)
• Drift: <0.3% / year
• Field of view: >160° (IEC 61724-1 Class A)
• Tilt-azimuth angle: 0° - 0°, ≤1° (IEC 61724-1 Class A)
• Output rate: 1/s
• Data output: Analog 0–1.5 V
• Power supply: 12–30 V DC
• Power consumption: 15 mA max @ 24 V DC
• Electrical connection: 3 m LIYYC11Y PUR cable, UV and weather resistant
• Cell temperature sensor: PT1000 Class A (EN 60751)
• Operating temperature: -40 °C to +85 °C
• Operating humidity: 0–100 %
• Box dimensions: 140 mm × 110 mm × 42 mm (W × L × H)
• Weight: 0.3 kg
• IP rating: IP54 (IP65, IP68 options)
• Housing material: Aluminum
• Standards: IEC 61724-1:2021 and IEC 60904 series
• Calibration: Calibrated under Class AAA sun simulator as per IEC 60904-2 and IEC 60904-4 using an ISFH-calibrated reference cell
• Field test: Verified under natural sunlight against a Fraunhofer ISE reference cell