Tjärnö Marin Biological [Akademiska Hus]

Via an intranet-based report program laboratory scientists and students can get instantaneous and historical readings from the AP installed weather station at Tjärnö for example temperature, humidity, wind speed, air pressure, rainfall and other important readings.

AP provides efficient systems and instruments to identify and evaluate weather data.

The picture shows an aerodynamic rain gauge, WRG 100, which is designed to reduce the resistance and turbulence and is designed to have a small surface area against the wind and can be placed in exposed locations.

The rain is measured by the well-tested "Tipping bucket" method.

The rain is collected in the hopper and sent to one of the two reservoirs located on each side of a short balancing arm.

The balancing arm tilts over when the first reservoir is full, empties the reservoir and places the second reservoir under the hopper.

This is repeated again and again until the rain stops falling and each discharge represents a specific volume of rainwater.

At each discharge the mobile arm forces a magnet to pass over a reed relay with the result that a contact closes for a few milliseconds.

The pulses created by rainfall can be calculated during a preset time interval and carefully establishes the amount of the rainfall.

Rikshospitalet, Oslo installs weather station from AP

The DUC is connected to the wind speed and direction along with moisture and temperature regulation.

The DUC controls, over the network, awnings, shutters and blinds fully automatically.

At sunshine, for example, the awnings are rolled out and at dusk they rolled up.

The Weather Station WSD is a combination of wind speed and wind direction sensors and is made of a shiny anodized aluminum alloy.

The wind speed component consists of a light weight cone made of ABS for rapid response, mounted on a double counterbalanced shaft made of stainless steel.

It uses a Bremag 10 magnet which operates a moist mercury reed relay, which gives a smooth pulse from the rotor at each revolution.

The wind component consists of the dynamically balanced weather vane, which operates a triple counterbalanced shaft and a micro pivoted 357 degree potentiometer with a dead zone at 3 degrees north.

With the above construction, most modern data logs/DUC:s or PLC can be connected to the sensors with or without interfaces.