Kipp & Zonen SMP Series Smart Pyranometers
The SMP series pyranometers are designed for measuring short-wave irradiance on a plane surface, which results from the sum of the direct solar radiation and the diffuse sky radiation incident from the hemisphere above the instrument.
- Internal digital signal processing and interfaces for industrial applications
- Automatic correction for temperature dependence of the detector sensitivity
- Built-in bubble levels and adjustable leveling feet
The SMP series instruments are high quality radiometers designed for measuring short-wave irradiance on a plane surface (radiant flux, W/m²), which results from the sum of the direct solar radiation and the diuse sky radiation incident from the hemisphere above the instrument. SMP pyranometers feature internal digital signal processing and interfaces optimised for industrial data acquisition and control systems. Kipp & Zonen has developed a smart interface that features RS-485 Modbus data communication for connection to programmable logic controllers (PLC’s), inverters, digital control equipment and the latest generation of data loggers. Amplified Voltage or Current outputs are also included for devices that have high-level analogue inputs or current loop interfaces. All models are available in two versions. One has an analogue voltage output of 0 to 1 V, the other has an analogue current output of 4 to 20 mA. They all have a 2-wire RS-485 interface with Modbus (RTU) protocol. Digital signal processing provides faster response times and, with an integrated temperature sensor, corrects for the temperature dependence of the detector sensitivity. To achieve the required spectral and directional characteristics SMP Series pyranometers use thermopile detectors and glass domes. All SMP’s have built-in bubble levels and adjustable levelling feet. Snap-on sun shields reduce solar heating of the housings. The waterproof connectors have gold-plated contacts. The pyranometers are normally delivered with a waterproof plug pre-wired to a high quality signal cable, typically this is 10m long but other lengths are available. The instruments can also be ordered without a cable or with a plug only, for the user to fit their own cable.