Guarantee IEC 61724-1 compliant monitoring with the MV-01 Ventilator & Heater . Compatible with all MS & S-Series sensors, the MV-01 is an optional add-on that helps to reduce sensor soiling, keeping sensors free from dew, ice and snow. Proven in challenging environmental conditions, the MS-80S Class A Pyranometer plus MV-01 is a go-to option globally for rooftop solar stations, solar parks of all sizes, and large weather monitoring sensor networks. Plus, with the MS-Albedo MV Kit, users can also combine the MV-01 with any two MS or S-Series sensors to create a custom IEC 61724-1 compliant albedometer. The MV-01 features a low power fan and highly effective heater, with independent on/off settings for variable operating conditions, a standard tacho output for fan speed monitoring and a temperature safety switch to protect the ventilator from overheating.