SR30-M2-D1 Ventilated Pyranometer

Heated For High Data Availability, Featuring RVH™ Technology

High data availability is attained by heating of the outer dome using ventilation between the inner and outer dome. RVH™- Recirculating Ventilation and Heating - technology, developed by Hukseflux, suppresses dew and frost deposition and is as effective as traditional ventilation systems, without the maintenance hassle and large footprint.

The dome of SR30 pyranometer is heated by ventilating the area between the inner and outer dome. RVH™ is much more efficient than traditional ventilation, where most of the heat is carried away with the ventilation air. Recirculating ventilation is as effective in suppressing dew and frost deposition at less than 3 W as traditional ventilation is at 10 W. RVH™ technology also leads to a reduction of zero offsets

Compliant with IEC 61724-1:2017 Class A and B

IEC 61724-1: Photovoltaic System Performance Monitoring - Guidelines for Measurement, Data Exchange and Analysis - requires ventilation and heating for Class A monitoring. Only SR30 offers both, without the need for additional accessories. Most competing pyranometers do not even comply with Class B, which requires heating.

Remote Sensor Diagnostics

In addition to solar irradiance, SR30 outputs sensor diagnostics such as: tilt angle Internal ventilator speed (RPM) Internal humidity Heater current Remote diagnostics permits real-time status monitoring, reducing the need for (un)scheduled field inspections.

Tilt Angle Measurement Included

SR30 includes a tilt sensor. This is very practical for remote checks of instrument condition or to monitor PV systems with solar trackers. The sensor measures with high accuracy, within 1 ˚, and is tested and temperature compensated between - 30 and + 50 ˚C. SR30-M2-D1 offers improved electronics over its predecessor SR30-D1.

Spectrally Flat As Required For Meteorology And PV monitoring

The new ISO 9060:2018 version defines pyranometer classes A, B and C. The standard also adds a new subclass, called "spectrally flat". The vast majority of users needs to use instruments of the spectrally flat subclass; only spectrally flat instruments measure with high accuracy, also when a cloud obscures the sun, or when the irradiance includes reflected radiation. These situations occur for example when you measure Global Horizontal irradiance (GHI) under partly or fully cloudy skies, when you measure Plane of Array (POA), albedo or net-radiation. Normal instruments, just of class A, B or C, and not spectrally flat, only measure accurately under clear sunny skies.