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Irradiance Sensor With 0-1,5V Output
This Irradiance Sensor is used to measure the radiation flux density of Solar PV Plants having an 0-1,5V Input Datalogger. Besides Irradiance, it includes also an Internal cell Temperature Sensor. It is supplied along with Mounting Bracket and Cable.
This Model of Irradiance Sensor is 100% compatible with SolarEdge Gateway and all other Dataloggers having 0-2V port.
Category: Irradiance Sensors
WORKING PRINCIPLES
A silicon solar cell can be used as an irradiance sensor, because the short-circuit current is proportional to irradiance. Our sensors are built out of a monocrystalline solar cell connected to a shunt. Due to the low resistance of the shunt the cell operates next to short circuit.
The temperature coefficient of the short-circuit current creates a small error. The compensation is realized by using a temperature sensor laminated to the rear side of the solar cell. The measuring signals of short- circuit current of the cell and the resistance value of the temperature sensor are measured by a micro controller. The calculated values of irradiance and temperature given onto a 0-1,5V protocol. The electronic circuit is optimized for low power consumption.
CONSTRUCTION FEATURES
Monocrystalline Cell: The cell is laminated with 2 EVA sheets, one Tedlar sheet and 3mm tempered glass under 180 °C homogeneous temperature and under vacuum effect. The size of the monocrystalline cell is 52×52 mm² or 31x31mm².
Sensor Box: It is an UV protected aluminum box. The sensor box has two opening access and the mounting holes on its sides are for easy site installation. There are three options for IP Class; IP54, IP65 and IP68. For ventilation purpose, there are 1mm holes at bottom side of the box, or a ventilation plug on its side.
TECHNICAL DATA
| Item Code | 3S-IS-T-V |
| Reference Cell | Monocrystalline Silicon (31 mm x 31 mm) |
| Current Shunt | High precision shunt resistor directly soldered to the terminals of the cell |
| Irradiance Range | 0 – 1500 W/m² |
| Uncertainty | ≤1,2%; as per IEC61724-1 standard Class A |
| Resolution | 0.1 W/m² ≤ 1W/m²; as per IEC61724-1 standard Class A |
| Response Time | 1 sec. less than 3 sec; as per IEC61724-1 standard Class A |
| Drift | Very small drift of <0.3%/ year |
| Field of View | Larger than 160° as per IEC61724-1 standard Class A |
| Tilt-Azimuthal Angle | 0°- 0° , ≤ 1°; as per IEC61724-1 standard Class A |
| Output Rate | 1/s |
| Data Output | Analog 0-1,5 V |
| Power Supply | 12 to 30 V DC |
| Power Consumption | 15 mA max @24 VDC |
| Electrical Connection | 3 m LIYYC11Y PUR Cable, UV and Weather Resistant |
| Cell Temperature Sensor Type | PT1000 Class A as per EN 60751 |
| Operating Temperature Range | -40°C to +85°C |
| Operating Humidity Range | 0 to 100 % |
| Box Dimensions | 140 mm x 110 mm x 42 mm (W x L x H) |
| Weight | 0.3 kg |
| IP Rating | IP54 (IP65, IP68 options) |
| Sensor Housing Material | Aluminum |
| Compliant Standard | IEC 61724-1:2021 and IEC 60904 |
| Calibration | Each sensor is calibrated under Class AAA Sun Simulator as per IEC 60904-2 and IEC 60904-4 by using a reference cell calibrated by ISFH-Germany |
| Test | The test is carried under natural sunlight by using a calibrated reference cell from Fraunhofer ISE, Germany |