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300 Series Mechanical Compact SPDT with Adjustable Hysteresis

  • Switch adjustment ranges from vacuum through 4,600 psig depending on model
  • Standard Zinc-nickel with Buna-N diaphragm wetted parts
  • SPST or SPDT snap-action switch with solid Silver contacts
  • CE compliant to suppress RFI, EMI and ESD
  • RoHS compliant

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SERIES 300V 300 Vacuum Series 300H 300 High Pressure Series  
300L 300 Low Pressure Series      
SWITCH FUNCTION 1 SPST, Normally open 3 SPDT  
2 SPST, Normally closed      
PROCESS CONNECTION 1 1/8″ NPT male 33 G 1/8B  
2 1/4" NPT male 45 7/16-20 SAE Male, Non-Adjustable  
10 G 1/4B      
300V VACUUM PRESSURE SWITCH ADJUSTMENT RANGES (Max. working pressure) 5/28-vac -5 inHg to -28 inHg (350 psig)      
300L LOW PRESSURE SWITCH ADJUSTMENT RANGES (Max. working pressure) 3/7 3 psig to 7 psig (870 psig) 7/120 7 psig to 120 psig (870 psig)  
3/15 3 psig to 15 psig (870 psig) 15/200 15 psig to 200 psig (870 psig)  
3/30 3 psig to 30 psig (870 psig) 15/230 15 psig to 230 psig (870 psig)  
7/70 7 psig to 70 psig (870 psig) 30/290 30 psig to 290 psig (870 psig)  
300H HIGH PRESSURE SWITCH ADJUSTMENT RANGES (Max. working pressure) 100/220 100 psig to 220 psig (5,000 psig) 145/2320 145 psig to 2,320 psig (5,000 psig)  
145/435 145 psig to 435 psig (5,000 psig) 300/2900 300 psig to 2,900 psig (5,000 psig)  
145/1160 145 psig to 1,160 psig (5,000 psig) 300/3600 300 psig to 3,600 psig (5,000 psig)  
145/1750 145 psig to 1,750 psig (5,000 psig) 450/4600 450 psig to 4,600 psig (5,000 psig)  
ELECTRICAL CONNECTIONS† 1 36" Cable attached to option 8 100 Deutsch 2-Pin Male (DT04-2P)*, **  
8 Hirschmann (DIN EN 175301-803 Form A) 101 Deutsch 3-Pin Male (DT04-3P)*  
25 M12 x 1 4-Pin 103 Deutsch 2-Pin Female Socket (DT06-2S)*, **
36 3’ Integral Cable 104 Deutsch 3-Pin Female Socket (DT06-3S)*  
66 Deutsch Integral 2-Pin (DT04-2P) ** 110 Weatherpack Tower, 3-Pin Female*
96 Weatherpack Tower, 2-Pin Female*, ** 111 Weatherpack Tower, 3-Pin Male*  
97 Weatherpack Tower, 2-Pin Male*, ** 112 Weatherpack Shroud, 3-Pin Female*  
98 Weatherpack Shroud, 2-Pin Female*, ** 113 Weatherpack Shroud, 3-Pin Male*  
99 Weatherpack Shroud, 2-Pin Male*, **      
OPTIONS *** EP EPDM Diaphragm (-10/250 °F) VT FKM Diaphragm (0/250 °F)  
HNBR Low Temp Nitrile (-40/110 °F) SS 316 SS Wetted Materials  

Please consult your local NOSHOK Distributor or NOSHOK, Inc. for availability and delivery information.

* Options attached to 18” cable
** For SPST only*** Not all options are available for all ranges, consult factory
†   Other electrical connections available, consult the factory

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SPECIFICATIONS
Switching parameters    
    Function
    Contact rating
  
    Repeatability
    Hysteresis
    Contact material
    Frequency

SPST or SPDT
6A @ 125/250 Vac
6A @ 12/24 Vdc
2% of full set point range at 70 °F
Adjustable, view charts
Solid Silver, self-cleaning
Max. 100 cycles/min
Switch type Snap action with adjustable hysteresis
Pressure ranges -5 inHg to -28 inHg (350 psig) through 450 psig to 4,600 psig (5,000 psig)
Service life >1,000,000 load cycles
Temperature ranges Media -4 °F to 176 °F (-20 °C to 80 °C)
Ambient -4 °F to 176 °F (-20 °C to 80 °C)
Storage -4 °F to 176 °F (-20 °C to 80 °C)
Proof pressure 870 psig or 5,000 psig depending on adjustment range
Measuring element Buna-N
Housing material Zinc-nickel plated Steel
Environmental rating IP65
Weight Approximately 0.2 lb

Options & Accessories

NOSHOK's Distribution Manifolds connect multiple instruments to one diaphragm seal, eliminating multiple connections that lead to possible leak paths.

View NOSHOK Distribution Manifolds

  • Factory Adjusted Switch Point (Specify)
  • Resist clogging and are self-cleaning
  • Five different sized pistons included with each snubber to ensure the correct amount of snubbing for virutally every application
  • Available in Brass and 316 Stainless Steel in 1/4" NPT, 1/2" NPT or SAE J1926-3: 7/16-20
  • Weight approximately 0.2 lb. for 1/4" & 7/16", and approximately 0.4 lb. for 1/2"​​​​​​

Specifications

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov


WARNING: This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

  • Cost effective solution to protect expensive instrumentation
  • Increases gauge readability by smoothing out pressure surges, pulsations and spikes
  • 5 basic elements available for each snubber to accommodate specific application needs
  • Snubbing action achieved by utilizing a corrosion resistant 316 Stainless Steel sintered porous element
  • Exotic materials or intermediate disc grades available
  • Provides long service life with no moving parts to wear out
  • Weight approximately 0.2 lb. for 1/4" & 7/16", and approximately 0.4 lb. for 1/2

Specifications

Dimensions

Replacement Disc Options

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov


WARNING: This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

  • Temperature ratings: 15,000 psi @ 200 °F and 3,000 psi @ 1,000 °F
  • Used with gauges and gauge valves to adjust the line of sight
  • Rotates 360° to allow the connected instrument to be positioned in the desired direction
  • The pressure connection is achieved with a tapered cone style compression fitting simply by tightening the swivel hex nut
  • All 316 Stainless Steel construction
  • Standard with 1/2" NPT male process – 1/2" NPT female instrument connections
  • Also available with 1/4" NPT connections, same specifications apply
  • Weight approximately 0.8 lb.

Swivel Adaptor Dimensions


WARNING: This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

  • Protect the instrument from the damaging effects of high temperature steam
  • Recommended for use in all steam applications
  • Available in 1/4" and 1/2" NPT sizes in welded steel, welded 316 Stainless Steel or seamless 316 Stainless Steel with ratings to 3,800 psi @ 850 ºF

Specifications

Dimensions

Steam Syphons Temperature 1/4" NPT vs. Pressure charts

Steam Syphons Temperature 1/2" NPT vs. Pressure charts

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov


WARNING: This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov