The NOSHOK 300 Series Mechanical Pressure Switch is constructed with a rugged zinc plated steel housing and process connection, and provides adjustable hysteresis (10-30 percent of switch point). Utilizing a proven diaphragm or piston type sensing technology, it provides excellent reliability, repeatability, and affordability for use in many applications. The micro switch contacts are silver plated for extended service life and exceptional dependability. Switching functions are field adjustable, while under pressure, and it features an SPDT single changeover contact configuration. RoHS compliant. Applicable for hydraulic systems, industrial machinery and machine tools, stamping and forming presses, pumps and compressors. NBR diaphragm is less than 225 psig; Steel piston with NBR seal is greater than 225 psig. Diaphragm type, compressed air or not corrosive liquids Piston type, self lubricating fluids such as hydraulic oil or grease. Zinc plated steel connection material. SPDT, micro switch with silver plated contacts switching function. Diaphragm Type: 870 psi; Piston Type: 5000 psi maximum working pressure. +/-2 percent of full scale adjustment range. Up to 28VDC 2A, up to 125VAC 4A, up to 250VAC 4 A Contact Rating. Maximum 100 cycles per minute switch frequency. Greater than 1000000 cycles. -4 to 176 degree F storage, media and Ambient temperature. Hirschmann (DIN EN 175301-803) electrical connection. NEMA 4:IP65 environmental protection.
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