Analog solar radiation sensor 3S-IS-T-V

0-1,5 VIEC 61724-1with temperature sensor

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

What the sensor measures
Solar irradiance is the solar power received per unit area (W/m²). The 3S-IS-T-V uses a monocrystalline silicon reference cell and provides temperature-compensated irradiance values in W/m² suitable for monitoring and performance assessment of PV systems.

How the 3S-IS-T-V sensor works

• A monocrystalline solar cell absorbs sunlight and generates current.
• A precision shunt resistor converts the cell current into a voltage signal proportional to irradiance.
• An integrated temperature sensor mounted on the rear of the cell compensates for temperature-related deviations.
• An electronic board processes measurements and computes temperature-compensated irradiance (W/m²).
• Processed data is output via an analog 0–1.5 V signal for connection to PLCs, SCADA or dataloggers.

Key features and benefits

• High accuracy: IEC 61724-1 Class A compliance with uncertainty ≤1%.
• Fast response: typical 1 s response time (optionally down to 500 ms).
• Durable housing: UV-protected aluminium enclosure (IP54 standard) with optional IP65/IP68 configurations for harsher environments.
• Easy installation: supplied with mounting bracket and 3 m cable for plug-and-run integration.
• Low maintenance: designed for long service life and minimal upkeep.

Selected product details / FAQ

• Uncertainty: ≤1% (IEC 61724-1 Class A).
• SCADA / datalogger compatibility: compatible with systems that accept analog 0–1.5 V (e.g., SolarEdge dataloggers) and with 0–2 V input ports when supported by the receiver.
• Calibration and testing: each unit is calibrated under a Class AAA sun simulator per IEC 60904-2 and IEC 60904-4 using an ISFH-calibrated reference cell; units are also verified under natural sunlight against a reference cell from Fraunhofer ISE.
• Recommended recalibration interval: every 2 years for maximum accuracy.
• Warranty: 5-year warranty for the 3S-IS-T-V sensor.
• Indicative price range: 155 EUR – 285 EUR.
• Cable: supplied with 3 m LIYYC11Y PUR cable (UV and weather resistant); other lengths on request; recommended maximum extension 20 m.
• Delivery times: small orders ~1–2 weeks; bulk orders (100 pcs) ~6–8 weeks.

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 (as per IEC 61724-1 Class A)
• Response Time: typically 1 s (below 3 s as per IEC 61724-1 Class A)
• Drift: <0.3% / year
• Field of View: >160° (IEC 61724-1 Class A)
• Tilt-Azimuthal 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 %
• Enclosure Dimensions: 140 mm × 110 mm × 42 mm (W × L × H)
• Weight: 0.3 kg
• IP Rating: IP54 (IP65, IP68 options)
• Housing Material: Aluminium
• Compliance: IEC 61724-1:2021 and IEC 60904 series
• Calibration: Calibrated under Class AAA sun simulator per IEC 60904-2 and IEC 60904-4 using ISFH (Germany) calibrated reference cell
• Field test: Verified under natural sunlight against Fraunhofer ISE reference cell (Germany)