Refrigeration test equipment tests and monitors equipment to ensure it is in good working order. Correct operating pressure and refrigerant temperature are important factors in ensuring that equipment is free of leaks and cooling correctly. Pressure measuring tools, such as vacuum and micron gauges, test the pressure in refrigerant lines to detect leaks and ensure the refrigeration system is clean and at the correct pressure before replacing or adding refrigerant. Temperature meters, such as superheat and subheat meters, measure refrigerant temperature as it travels through the system, ensuring that temperatures are correct and at a safe level before adding new refrigerant.