Testo 550 is an easy-to-use device, which users can use to measure and read off large figures. All measurements will be displayed quickly and easily, which is why the device has gained great popularity with various users. In addition to this, the pressure sensors are temperature-compensated and able to measure both low and high pressure precisely and quickly.The device can be used to calculate temperatures, while users can see the results of the measurement with a single glance. Next, there are two temperature inputs, which guarantee displaying superheating and subcooling at the same time as calculations. Users can also switch between measurement tasks simply by pressing a button. So buy now and enjoy a robust and extremely convenient item, with 33 refrigerants stored in it.