An Environmental Tester can be used Indoors or Outdoors to measure a Variety of Parameters such as Humidity, Temperature, Wind Speed or Velocity, Wind Direction, Air Quality, Sound Level, Electromagnetic Waves, Ionizing Radiation and more. From Climate Monitoring to Occupational Health and Safety (OHS) Applications, an Environmental Tester is a useful tool for gathering data about our surroundings. Depending on the model, an Environmental Tester can function as a Data Logger for long-term data acquisition by collecting and storing measurement data over a given time period. Wind Energy Trainer | Humidity & Temperature Meter | Air Flow Anemometer | Digital Sound Level Meter | Laser Distance Meter | Electrosmog Meter and many more.