Silicon
Irradiance Sensors

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

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Further information

Solar Irradiance Sensors
Data sheet of our analogue and digital Silicon Irradiance Sensors

Digital Si- Sensors (RS485 / MODBUS)


Type	Bild	Measurements	Notes
Si-RS485TC-T-MB	PV-Referenzzelle Si-RS485TC-T-MB	1. Solar irradiance 2. Cell temperature	––
Si-RS485TC-2T-MB	PV-Referenzzelle Si-RS485TC-2T-MB	1. Solar irradiance 2. Cell temperature 3. Ambient temperature	Firmly connected ambient temperature sensor (3 m connection cable). Optional Shield-Tamb-Si as a weather and radiation protection
Si-RS485TC-T-Tm-MB	PV-Referenzzelle Si-RS485TC-T-Tm-MB	1. Solar irradiance 2. Cell temperature 3. PV module temperature	Firmly connected module temperature sensor (3 m connection cable)
Si-RS485TC-2T-v-MB	PV-Referenzzelle Si-RS485TC-2T-v-MB	1. Solar irradiance 2. Cell temperature 3. Temperature (PV modul or ambient temperature) 4. Wind speed	Two waterproof connectors for one temperature sensor and one wind speed sensor. To order separately • External sensors with preconfigurated plug • Optional Shield-Tamb-Si as a weather and radiation protection
Si-RS485TC-3T-MB	PV-Referenzzelle Si-RS485TC-3T-MB	1. Solar irradiance 2. Cell temperature 3. Temperature 1 (PV modul or ambient temperature ) 4. Temperature 2 (PV modul or ambient temperature)	Two waterproof connectors for two temperature sensor (for example Tmodul-Si and Tamb-Si). To order separately • External sensors with preconfigurated plug • Optional Shield-Tamb-Si as a weather and radiation protection

Analogue Si- Sensors


Type	Irradiance at 0 to 1500 W/m²	Temperature at -40 to +90 °C
Si-V-10TC	0 to 10 V	–
Si-V-10TC-T	0 to 10 V	0 to 10 V
Si-I-420TC	4 to 20 mA	–
Si-I-420TC-T	4 to 20 mA	4 to 20 mA
Si-V-1.5TC	0 to 1,5 V	–
Si-V-1.5TC-T	0 to 1,5 V	0 to 2 V
Si-mV-85	0 to approx. 85 mV	– (optional Pt100 / Pt1000)

PV cell	Monocrystalline silicon; 50 mm x 33 mm, vendor: BigSun, type: B156X1D2A-2010
Case	Powder-coated aluminium, 155 mm x 85 mm x 39 mm, 350 to 470 g
Degree of protection	IP 67
Operating temperature	-35 to +80°C
Connection cable	Length: 3 m, PUR sheath, shielded, UV and weather resistant, LiYC11Y, 4 x 0.14 mm²
Voltage supply	Typical 24 V_DC
Customs tariff number	90 15 80 20