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SPECIFICATIONS
Adjustment ranges 3 psig to 30 psig through 450 psig to 4,600 psig
Measuring element NBR diaphragm < 225 psig; Steel piston with NBR seal > 225 psig
Media Diaphragm type, compressed air or not corrosive liquids
Piston type, self lubricating fl uids such as hydraulic oil or grease
Process connection 1/4″ NPT standard, others available on request
Connection material Zinc-plated steel, optional stainless steel or brass
Case Zinc-plated steel
Switching function SPDT, micro switch with silver-plated contacts,
gold-plated contacts available on request
Maximum working pressure Diaphragm type: 870 psi; Piston type: 5,000 psi
Hysteresis Adjustable, 10-30% depending on switch point
Repeatability ±2% of full scale adjustment range
Contact rating Up to 28 Vdc
Up to 125 Vac
Up to 250 Vac
2A
4A
4A
Switch frequency Max. 100 cycles/min
Durability >1,000,000 cycles
Temperature ranges Storage
Media
Ambient
-4 °F to 176 °F (-20 °C to 80 °C)
-4 °F to 176 °F (-20 °C to 80 °C)
-4 °F to 176 °F (-20 °C to 80 °C)
Electrical connection Hirschmann (DIN EN 175301-803)
Environmental protection NEMA 4:IP65
Weight Approximately 0.2 lb.
Special Note: RoHS compliant
FEATURES
■ Measuring ranges from 3 psig to
30 psig through 450 psig to 4,600 psig
■Field adjustable switching point
■Diaphragm or piston type sensing
element
■Micro-switch technology
■Hirschmann electrical connection
APPLICATIONS
■ Hydraulic systems
■Industrial machinery and machine tools
■Stamping and forming presses
■Pumps and compressors
• Ranges available from 3 psig to 30 psig through 450 psig to 4,600 psig
• Rugged zinc-plated steel housing and process connection
• Proven diaphragm or piston type sensing technology provides excellent reliability, repeatability,
and affordability
• Micro switch contacts are silver plated for extended service life and exceptional dependability
• Switching functions are fi eld adjustable while under pressure
• SPDT single changeover contact confi guration
• Hirschmann electrical connection
• RoHS compliant
300 SERIES
Pressure
Mechanical Compact SPDT Switch with Adjustable Hysteresis