pressure switch - Qingdao Wisdom International Trading Co. Ltd

H20PS（M） series pressure switch is a miniature pressure switch. It controls the circuit open or close on pressure of the controlled medium increase or decrease. It is widely used in refrigeration system, oil pump, air pump and the other industry equipment which require to adjust the medium pressure to protect sytem.

WORKING PRINCIPAL

The working principle of H20PS series pressure switch is : when the pressure of the controlled medium rises to a predetermined value, the metal flip disk will flip and drive a set of electrical contacts by means of a transfer pin. When the pressure of the controlled medium drops below another predetermined value, the snap disk will flip to the original state, to make the contact terminal close (or open). In the way the switch function is realized.

There is a slight difference between the working principle of H20PS(M) series pressure switch and H20PS series pressure switch; when the pressure of the controlled medium decreases, the switch can not reset automatically. And just only as the push button is pressed, the circuit will reset to the original state.

TECHNICAL PARAMETER

Type	H20PS	H20PSM
Type of Reset	Automatic	Manual
Switch Action Option and Connect Option	A=Lead wire，Normally open(NO) B=Lead wire, Normally closed(NC) c=Quick connect terminal, NO D=Quick connect terminal, NC E=Lead wire, single-pole, double-throw F=Quick connect terminal, single-pole, double-throw	A=NO B=NC
Pressure Range	0.02MPa~5.5MPa	0.02MPa~5.5MPa
Ambient Temperature Range	-35℃~+65℃	-35℃~+65℃
Electrical Ratings	AC120/240V,375V AC/DC36V,3A AC120V,5.8FLA,34.8LRA AC240V,2.9FLA,15LRA	AC120/240V,375V AC/DC36V,3A AC120V,5.8FLA,34.8LRA AC240V,2.9FLA,15LRA
Life at Rated Current	100000 cycles	6000 cycles
Dielectric	Terminal to terminal:AC600V,10S Terminal to case:AC1500V,1min	Terminal to terminal:AC600V,10S Terminal to case:AC1500V,1min