Detailed Explanation for Technology Data of pressure switch

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The working principle of the pressure switch: when the measured pressure exceeds the rated value, the free end of the elastic element will produce displacement, push the switch element directly or after comparison, change the on-off state of the switch element, and achieve the purpose of controlling the measured pressure.

Pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out alarm or control signal. The elastic elements used in the pressure switch are single coil spring tube, diaphragm, bellows, etc.

The switch elements include magnetic switch, mercury switch, micro switch, etc.

There are two types of pressure switch: normally open type and normally closed type.

The pressure switch can be adjusted in two position and three position ways.

Accuracy: value indicating the accuracy of the equipment, including linearity, tolerance, hysteresis, repeatability, etc. At present, the highest accuracy of the pressure switch of “A.YITE TECH” can reach ± 0.5% F.S. the model is GE-208.

GE-208 Adjustable Pressure Switch

GE-208 adjustable pressure switch is a mechanical controller, the work...

Maximum pressure (max.p): the maximum value of the pressure range.

Full scale (F.S): the difference between the maximum value and the minimum value of the pressure range.

Disconnection difference (dead zone): refers to the difference between the set action value and reset value of the switch. For example, when the set and value are 1MPa and the actual reset value is 0.9mpa, the disconnection difference is 0.1MPa.

Operating temperature: refers to the temperature range within which the internal mechanism, sensitive elements, etc. of the instrument will not continuously deform when working. Generally, the recommended operating temperature range of the pressure switch is - 5 ~ 400C. If the medium temperature is too high, it can be considered to add an accessory siphon (in the form of a filling) to achieve the purpose of cooling.

SPDT: consists of a normally open, a normally closed contact and a common terminal.
DPDT (double pole double throw): it is composed of a symmetrical left and right common terminals and two groups of normally open and normally closed terminals.

Fixed setpoint Differential Pressure Switches

GE-512 Differential Pressure Switch with fixed pressure setpoint, as a...

Upper limit one contact (normally open): when the pressure rises to the set value, the contact acts and the circuit is open.

Lower limit one contact (normally closed): when the pressure drops to the set value, the contact acts and the circuit is open.

Upper and lower limit two contact HL: it is a combination of upper limit type and lower limit type. It can be divided into two types: independent action of two contacts (double setting, double circuit) and simultaneous action of two contacts (single setting, double circuit).

Upper limit 2 Contact: two upper limit forms are combined, which are divided into two types: independent action of two contacts (double setting, double circuit) and simultaneous action of two contacts (single setting, double circuit).

Lower limit 2 Contact: two lower limit forms are combined, including two contact independent action (double setting, double circuit) and two contact simultaneous action (single setting, double circuit).

Max voltage: the maximum pressure that the pressure switch can bear to maintain its normal performance. But when the pressure switch is used in the over-voltage situation, the sensitive element will produce continuous deformation, at this time, the pressure setting value will change, and the pressure switch will not play its normal performance or even damage.

IP (degree of protection): it is a standard drafted by International Electrotechnical Association (IEC) on dust-proof and moisture-proof characteristics of lamps.