DeltaOHM, an Italian company, has been dedicated to the production and research and development of precision electronic instruments for over 30 years. Its product measurement range includes temperature, humidity, carbon dioxide, pressure, wind speed, solar radiation, illuminance, rainfall, noise, air quality IAQ, water quality analysis, and more. The product types are divided into handheld and sensor/transmitter. DeltaOHM only produces high-precision and high stability instruments and does not produce rough products. We now have an Italian national SIT laboratory calibration center and a meteorological laboratory. At present, the meteorological laboratory in Delft, Italy has been recognized by the public for the following testing items: temperature, acoustics, radiation intensity, pressure, humidity, wind speed, etc. Del Te's goal in Italy is to maintain high industry standards. To this end, the company has established a national level SIT Centre n.124 calibration center, which is equipped with national level laboratory equipment.