Description:
Sensors
All sensors are integrated into a single, small unit, requiring minimal installation effort. With only one moving part, the design is low-maintenance and ideal for long-term installations in remote locations.
Pyranometer
Solar radiation is measured by a pyranometer integrated into the lip of the rain gauge funnel at the top of the ClimaVue 50 G2. This miniature pyranometer uses a silicon cell sensor to measure total incident solar radiation (direct and diffuse). Silicon cell sensors respond very quickly to changing radiation conditions and exhibit acceptable sensitivity across the entire solar spectrum, making them well-suited for use in the ClimaVue 50 G2.
A carefully engineered cosine correction head ensures accurate readings regardless of the sun's angle, while the carefully selected optical filter material offers a balanced cost-performance ratio, ensuring that the silicon cell provides high accuracy for the ClimaVue 50 G2 regardless of temperature and sensor age.
Anemometer
The ClimaVue 50 G2 measures wind speed in the space below the rain gauge. Ultrasonic signals emitted by transducers positioned at right angles to each other are reflected by a curved plate and return to the opposite sensor. The wind affects the speed of sound, and the wind speed is calculated by measuring the differences in the travel time of the sound waves.
The wind sensor of the ClimaVue 50 G2 has been significantly improved. The redesigned transducer geometry doubles the measurable wind speed. The water-repellent coating of the transducers and the improved reflector plate design prevent moisture buildup, increase reliability in various weather conditions, and contribute to the sensor's robustness. Thanks to these improvements, the ClimaVue 50 G2 can measure wind speeds up to twice the range of its predecessor, making it a highly efficient and durable tool for meteorological observations.
temperature sensor
The temperature measurement of the ClimaVue 50 G2 takes place in the middle of the anemometer area, where a small stainless steel needle with a tiny temperature sensor (thermistor) protrudes from the center of the four transducers in the middle of the anemometer.
Unlike most air temperature sensors, the ClimaVue 50 G2 is not covered with louvers to protect it from sunlight. Instead, it is located outdoors and exposed to direct sunlight on the housing. However, the ClimaVue 50 G2 accurately corrects the measured air temperature because the solar irradiance and wind speed are known. These two factors are the primary variables that determine the error between the measured and actual air temperature. Using an energy balance equation, the actual temperature is then calculated with an accuracy of ±0.6 °C.
Further information can be found in the technical document. “ClimaVUE™50 – Correction of air temperature measurements with a radiation-exposed sensor”.
Relative humidity sensor
The relative humidity sensor of the ClimaVue 50 G2 is located behind the round Teflon screen near the transducers. The Teflon screen protects the sensor from liquids and dust, while allowing water vapor to reach the sensor unimpeded. The ClimaVue 50 G2 measures relative humidity and temperature and calculates vapor pressure.
rain gauge
The ClimaVue 50 G2 features a newly developed rainfall sensor with dual-sensor technology, which significantly improves the reliability and range of the sensor.
Drop counter
Directly below the collecting funnel are gold-plated pins that precisely count every drop falling through the funnel, thus providing an impressive resolution of 0.017 mm for dew and rain.
Chicken wagon
In addition to the drop counting, a tipping bucket was added below the drop counter, which extends the precipitation range to up to 1,500 mm/h during heavy rainfall and provides redundant measurements to improve reliability.
A notice: This unheated sensor is not suitable for measuring solid precipitation or in environments with frost.
tilt sensor
The ClimaVue 50 G2 is also equipped with a tilt sensor. The tilt sensor data primarily serves to ensure that the ClimaVue 50 G2 is level at all times. Regularly check the X and Y tilt data to ensure the ClimaVue 50 G2 is level. If it is tilted, return to its location and realign it. A tilt of three degrees can lead to errors in rain and solar radiation measurements. Although the readings from this sensor can be used to level the device during installation, it is much easier to use the small spirit level on the underside of the anemometer plate.
Montage
The ClimaVue 50 G2 comes with a V-screw for mounting on a pipe with a nominal diameter of 31.8 to 50.8 mm (1.25 to 2.0 inches). This allows the sensor to be mounted directly on a tripod mast or CM300 series bracket, or with the 17387-Mounting tube set It can be mounted on a crossbar. An integrated accelerometer, leveling base, and spirit level ensure easy installation and guarantee that the sensor is always correctly positioned and delivers valid measurements.
