The temperature and pressure on one table red triangle have what effect?

Temperature and pressure of a surface, as the name implies, is a watch can measure temperature also can measure the pressure, meet a lot of need to measure the temperature and pressure at the same time the demand of the industrial equipment, a table, is also very high cost performance. Sometimes we will see the temperature and pressure on a surface of a table with a red triangle, then the red triangle has what effect? This is a common temperature and pressure of a surface, its model is WHT - 7, we can clearly see in it the table there is a red triangle. To say you must have to talk about the function of the red triangle in the structure of the table. Its cover is a rotatable design, when we rotate the cover, table cover will rotate at the same time. So that the function of the red triangle mark. , for example, for the first time, we can measure the temperature, the position of the red triangle rotate to the corresponding temperature measurement is for a second time will know the difference between the two measurements. Of course if you don't want this tag function, can also don't need tags. So we can choose according to actual condition when the choose and buy.