Silicon Irradiance Sensors for Measurement of Solar Irradiance Model Si-RS485TC-2T-MB

Silicon Irradiance Sensors for Measurement of Solar Irradiance Model Si-RS485TC-2T-MB

Digital Silicon Irradiance Sensor with RS485 port, Irradiance 0...1500 W/qm, Temperatures -40 to +90 °C with measurement of cell temperature, incl. 3 m cable
Protocol: MODBUS

Measurements

1. Solar irradiance
2. Cell temperature
3. Ambient temperature

Notes

Firmly connected ambient temperature sensor (3 m connection cable)
Optional Shield-Tamb-Si as a weather and radiation protection

The World’s no. 1 in Reference Cells

Measure the irradiance intensity on your photovoltaics system precisely at an affordable price
with IMT Technology’s robust silicon solar irradiance sensors (Si sensors). The sensor element’s
design is similar to that of a PV module; this means that their spectral response (SR) and incident
angle modifier (IAM) are highly comparable. Consequently, these sensors are eminently suitable
as a reference for PV system monitoring.
 

Benefits & Features

• Reference solar cell for PV monitoring
• Calibration measurement uncertainty: 1.2 % (class A as per IEC 61724-1)
• Suitability for outdoor use verified by tests as per IEC 61215
• Extremely few mismatch errors due to optical
• properties as those of PV modules
• Calibration in relation to spectrum as per IEC 60904-3, AM1.5
• Exceptional linearity significantly above IEC 60904-10 requirements
• Pt1000 as per IEC 60751 Class A to measure cell temperature
• Developed and manufactured in Germany

Functionality & Construction

Mode of Operation
A silicon solar cell can be used as an irradiance sensor, because the short-circuit current is proportional to the irradiance. Our sensors are built out of a high-quality monocrystalline Si solar cell connected to a shunt. Due to the low resistance of the shunt the cell operates next
to short-circuit. To minimize influences of temperature on the measurement signal all of our sensors with the extension „TC“ have an active temperature compensation via a temperature sensor laminated to the back surface of the solar cell

All sensors are calibrated under artificial sunlight against a reference cell calibrated by the National Metrology Institute of Germany (PTB)

Construction
The solar cell is embedded in Ethylen-Vinyl-Acetat (EVA) between glass and Tedlar. The laminated cell is integrated into a powder-coated aluminium case. Therefore the sensor’s construction is comparable to that of a standard PV module.