Accurate weather forecasting requires accurate measurements. Rotronic humidity probes have a reputation for providing accurate and reliable longterm humidity data, esepcially in more demanding high humidity/low temperature locations.

Application: Weather stations 
Probe choice is application dependent. Some field applications (irrigation, spray watering) require low spec. probes at low cost. Conversely Met. Office applications need high spec., stable probes. 
  
Products 
Meteorological
Portable

Application: IAQ (Indoor Air Quality) 
Of increasing interest but for lower specification devices 
  
Products 
Transmitters 
Dataloggers 
Portable 
Meteorological