Kritech & Co PGmbH

Important features : Avoids built-up of frost and dew Improves accuracy of measurements Easy to install and low maintenance Pulse output to monitor performance Reduces Zero offset A Improved flow over the top of the dome Can be used under all weather conditions

Ventilation of radiometers improves the reliability and accuracy of the measurement by reducing dust, raindrops and dew on the dome. With thermopile-based instruments ventilation stabilizes the temperature of the radiometer and suppresses thermal offsets. The integrated heater can be used to disperse precipitation and melt frost, or even melt snow and ice in cold climates.

CVF 4 is a low power, low maintenance ventilation unit. The only part that needs maintenance is the removable air inlet filter, which should be checked at regular intervals and cleaned or replaced when necessary.

The flow that the CVF 4 creates is unique. At the top of the pyranometer dome the flow is very high and it swirls to improve the air distribution over the dome. The position of the heaters and the new cover material ensures that only half the heating power is needed to melt frost and snow compared to older ventilation units.

CVF 4 is designed to be used with Kipp & Zonen’s :

• CMP / SMP pyranometers
• CGR 4 / SGR 4 pyrgeometer
• CUV 5 / SUV 5 total UV radiometer

CVF 4 can be mounted on the 2AP and SOLYS 2 sun trackers and the CM 121C shadow ring.

CVF 4 replaces the successful and widely used CVF 3 ventilation unit.

Specifications