58
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
300 SERIES
Pressure
Mechanical Compact SPDT Switch with Adjustable Hysteresis
59
ORDERING INFORMATION
DIMENSIONS
WIRING DIAGRAMS
ELECTRICAL CONNECTIONS
Outline Dimensions
ORDERING INFORMATION
SERIES 300
SWITCH FUNCTION 1 Single changeover contact, SPDT
PROCESS CONNECTION 2 1/4″ NPT Male
ADJUSTABLE RANGES
(Max. working pressure) 3/30 3 psig to 30 psig (870 psig) 150/1700 150 psig to 1,700 psig (5,000 psig)
7/115 7 psig to 115 psig (870 psig) 150/2300 150 psig to 2,300 psig (5,000 psig)
15/225 15 psig to 225 psig (870 psig) 300/2900 300 psig to 2,900 psig (5,000 psig)
150/425 150 psig to 425 psig (5,000 psig) 300/3600 300 psig to 3,600 psig (5,000 psig)
150/1150 150 psig to 1,150 psig (5,000 psig) 450/4600 450 psig to 4,600 psig (5,000 psig)
ELECTRICAL CONNECTIONS 1 3 6 ″ Cable (connected to option 8) 8 Hirschmann (DIN EN 175301-803 form A)
Please consult your local NOSHOK Distributor or NOSHOK, Inc. for availability and delivery information.
300
SERIES
300 – 1 – 2 – 15/225 – 8
EXAMPLE
Series ........................................................300
Switch function ...Single changeover contact
Process connection ...............1/4
″
NPT Male
Adjustable range .............15 psig to 225 psig
Electrical connection .................Hirschmann
Additional Ordering Information
Switch Set Point(s) (please specify)
1 / BLK
2 / WHT
P
3 / RED
12
3
psi psi
Switch
Function
Hysteresis
Function
Switching Output Schematic
1.06" sq.
(27 mm)
1.10"
(28 mm)
1.13"
(44.5 mm)
0.47"
(12 mm)
1/4" NPT
1.0625" HEX
(27 mm)
1.06"
(27 mm)
1.97"
(50 mm)
