The instrument can measure double pressure (gauge pressure) at the same time, as as dual temperature measurement (need test clip,not include), with automatic multi-unit pressure conversion, automatic conversion of temperature Celsius / Fahrenheit, to facilitate different needs. Built-in 89 kinds of refrigerant pressure-evaporation temperature database, also calculate the subcooling superheat, to facilitate direct reading of operating process data. Also it tests percentage of vacuum measurement; pressure leak measurement, leak time speed record. It is deserved to have this multi-functional, accurate and simply operated digital manifold let you do the job right. /EN61010-1 safety standards for design and production. 1) The pressure measured by the digtal manifold pressure tester is gauge pressure. 2) Pressure testing ranges from -101Kpa to 6Mpa (-0.1bar to 60bar). 3) The limit pressure is 10 Mpa (100 bar). 4) The maximum operating pressure of standard hose is 600 ( approximate 4.13 Mpa, 41.3 bar ). The limit pressure is 3000 approximate 20.68 Mpa, 206.8 bar ). 5) confirm the rated pressure value of the tested equipment testing. Do not use it if it exceeds the range of the instrument. Also for DY517A, if the packed hoses does not match the pressure requirement, you can use suitable replacements for testing. Model Number: DY517 color:As shown Material:PC Package Contents: 1 x Refrigerant Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.