Pressure switch related terms

Pressure switch related terms

1.Precision: A value indicating the accuracy of a device, including linearity, tolerance, hysteresis, repeatability, etc.

2.Max Pressure : The maximum value of the pressure range.

3.Full scale: The difference between the maximum and the minimum of the pressure range.

4.Dead Zone: The difference between the setted action value and the reset value of the switch, for example, when the setted value is 1 MPA and the actual reset value  is 0.9 MPA, the difference of the switch is 0.1 MPA.

5.Operating temperature: refers to the temperature range which won’t  Cause continuous deformation of internal mechanism , sensitive elements when working.  if the medium temperature is too high, you can consider the addition of Siphon irrigation to reduce the temperature.

6.S. P. D. T (single pole double throw): make up of  a normally open, a normally closed contact and a common terminal

7.D. P. D. T (double-pole double throw): make up of a symmetric left, right common terminal, two groups of normally open, normally closed terminal composition

8.Higher limit-- contact is nomally open: When the pressure rises to a set value, contact action, circuit conduction.

9.Lower limit -- contact is normally closed: when the pressure drops to a set value, contact action, circuit conduction.

10.Higher and lower: combination of  upper and lower limit  ,Two contacts could act  independently (double settings, double-circuit )or Simultaneously( single-set, double-circuit ).

11.Two higher Limit contacts: combination of  2 higher limit contacts  ,Two contacts could act  independently (double settings, double-circuit )or Simultaneously( single-set, double-circuit ).

12.Two Lower Limit contacts: combination of  2 lower limit contacts  ,Two contacts could act  independently (double settings, double-circuit )or Simultaneously( single-set, double-circuit ).

13.Voltage withstand: the maximum pressure that a pressure switch can bear to maintain its normal performance. However, when the pressure switch is used in over-voltage situation, the sensing element will produce continuous deformation, then the pressure setting value will change, the pressure switch will not play its normal performance or even damage.

14.IP Protection Level: is drafted by the International Electrotechnical Commission, on the dust and moisture resistance of lamps and lanterns standard.