Digital Photovoltaic Pyranometer – Litemeter Modbus Pro
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Litemeter Modbus PRO is a digital photovoltaic pyranometer (or solar irradiance sensor) equipped with a monocrystalline silicon cell. Manufacturing and Calibrations are done following the IEC 61215, IEC 60904-2; 60904-4; 60904-10 regulations.
The silicon photovoltaic cell is laminated with E.V.A. and a performing anti-reflective glass for photovoltaic modules. It guarantees a fair precision in the measurement of irradiance and provides a measurement of the indicative temperature of the photovoltaic modules next to it.
This sensor has a RS485 bus interface, using the well known industry standard protocol Modbus RTU.
Calibration
All Litemeters are calibrated with our Class A Silicon Reference Cell, itself periodically calibrated by the Dakks accredited Fraunhofer Institute in Germany and a HP34410A Multimeter.
Note: the terms solarimeter, irradiance sensor, pyranometer and calibrated cell are interchangeable. On this site we will use irradiance sensor. To learn more click here.
Common uses
Litemeter Modbus Pro is ideal for monitoring and managing photovoltaic systems of up to a few hundred kW. It is useful where the monitoring system has RS485 input channels and a high accuracy in performance calculation is not required.
Key features
- Standard RS485 Modbus RTU protocol output to ensure readings 500m from the datalogger
- Anti-reflective high performance glass + E.V.A.
- Two 0-10V outputs: irradiance and cell temperature
- Aluminum body
- Mounting bracket for quick installation
- Resistant to extreme weather
- IEC EN 61215 par.10,11,12 compliant (product ageing)
- Calibrations according to IEC 60904
- Order code that allows you to obtain the most suitable sensor for your climate zone
Datasheet
| NAME | Litemeter PRO | |
| PRODUCT | LM2-485 PRO – monocrystalline silicon cell solar irradiance sensor (solarimeter) | |
| REFERENCE STANDARD | IEC 60904-2; 60904-4; 60904-10 | |
| OUTPUT | Digital | |
| Input range | Irradiance: | 0 – 1250 W/m2 |
| Spectral range | 0.36μm – 1.14μm | |
| Temperature | -30 to +85°C (1) | |
| Output signal (digital RS485 standard Modbus RTU) | Irradiance | 0 – 1250 W/m2 (not temperature compensated) |
| Output precision | Irradiance | ±5% (2.5% @S.T.C. (25°C)) |
| Temperature | ± 1.0 °C | |
| Response time | < 100 milliseconds | |
| Sensor type | Digital solarimeter | |
| Supply | External | 12 – 30V DC |
| Encapsulation | Glass + E.V.A. + Polyester | |
| Cable | 3 m shielded 5.7mm diameter cable, conductors 4 x 0,25mm2, UV and high temperature resistant | |
| Connectors | Standard M8 4 pin or non present (4+1 pin) | |
| Dimensions | 55x98x20.5mm without bracket | |
| IP Protection Grade | IP 65 | |
(1): Note: the temperature value is predetermined at project stage and verified at the production stage.
Pyranometers
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