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  • Switch adjustment ranges from vacuum through 4,600 psig depending on model
  • Standard Zinc-plated Steel with NBR diaphragm (< 225 psig); Steel piston with NBR seal (> 225 psig) wetted parts
  • SPDT snap-action switch
  • RoHS compliant
400-Series-Switch_lg.jpg
Unit of Measure
Items 400-Series-Switch_lg.jpg
400L-3-2-3/30-8
1 Single Pole Double Throw (SPDT), 1/4 National Pipe Thread (NPT) Male, 3 to 30 psig Adjustment, DIN EN 175301-803 Form A Electrical Connection Mechanical Pressure Switch
400-Series-Switch_lg.jpg
400L-3-2-7/120-8
1 Single Pole Double Throw (SPDT), 1/4 National Pipe Thread (NPT) Male, 7 to 120 psig Adjustment, DIN EN 175301-803 Form A Electrical Connection Mechanical Pressure Switch
400-Series-Switch_lg.jpg
400L-3-2-15/230-8
1 Single Pole Double Throw (SPDT), 1/4 National Pipe Thread (NPT) Male, 15 to 230 psig Adjustment, DIN EN 175301-803 Form A Electrical Connection Mechanical Pressure Switch
400-Series-Switch_lg.jpg
400L-3-45-3/30-8
1 Single Pole Double Throw (SPDT), 7/16-20 Society of Automotive Engineers (SAE) J514 FIG 34B, 3 to 30 psig Adjustment, DIN EN 175301-803 Form A Electrical Connection Mechanical Pressure Switch
400-Series-Switch_lg.jpg
400L-3-45-7/120-8
1 Single Pole Double Throw (SPDT), 7/16-20 Society of Automotive Engineers (SAE) J514 FIG 34B, 7 to 120 psig Adjustment, DIN EN 175301-803 Form A Electrical Connection Mechanical Pressure Switch
Description N/A
  • Switch adjustment ranges from vacuum through 4,600 psig depending on model
  • Standard Zinc-plated Steel with NBR diaphragm (< 225 psig); Steel piston with NBR seal (> 225 psig) wetted parts
  • SPDT snap-action switch
  • RoHS compliant
Type N/A Mechanical Switch
Series N/A 400
Switching Function N/A Single Pole Double Throw (SPDT) Snap-Action Micro Switch
Switch Adjustable Range N/A 3 to 30 psig N/A 7 to 120 psig N/A 15 to 230 psig N/A 3 to 30 psig N/A 7 to 120 psig
Electrical Connection N/A DIN EN 175301-803 Form A
Process Connection N/A National Pipe Thread (NPT) Male N/A National Pipe Thread (NPT) Male N/A National Pipe Thread (NPT) Male N/A Society of Automotive Engineers (SAE) Male, Non-Adjustable N/A Society of Automotive Engineers (SAE) Male, Non-Adjustable
Weight N/A 0.66 lb
Housing Material N/A Zinc Die-Cast
Environmental Rating N/A IP65 - DIN EN 175301-803 Form A
Switching Number N/A 1
Non-Repeatability N/A ±2% of Full Scale of Adjustment Range
Contact Material N/A Solid Silver, Self-Cleaning
Frequency [Max] N/A 200 cpm
Switch Point N/A Field Adjustable and/or Factory Set
Hysteresis N/A Piston Type, 2% to 8% of Adjustment Range Full Scale
Service Life N/A < 1,000,000 Load Cycles
Media Temperature Range N/A -20 to 80 ºC-4 to 176 ºF
Ambient Temperature Range N/A -20 to 80 ºC-4 to 176 ºF
Proof Pressure1 N/A 300 to 5,000 psig
Measuring Element N/A Nitrile Rubber (NBR) diaphragm ≤ 230 psig
Stainless steel piston with Nitrile Rubber (NBR) seal ≥ 500 psig
1/4" NPT and 7/16-20 SAE zinc-plated steel connections standard, others available on request
Shock According to International Electrotechnical Commission (IEC) 60068-2-27 N/A 30 g
Vibration According to International Electrotechnical Commission (IEC) 60068-2-6 N/A 10 g
Warranty N/A 1 yr
Electromagnetic Rating N/A European Conformity (CE) Compliant to European Standard (EN) 73/23/EWG Radio Frequency Interference (RFI), Electromagnetic Interference (EMI) and Electrostatic Discharge (ESD) Protection
Application N/A
  • Hydraulics & pneumatics
  • Mobile hydraulics
  • Power generation
  • Pumps & compressors
  • Tank monitoring
  • Water management
Prop 65 Warnings N/A
WARNING: This product can expose you to chemicals including Lead and Nickel, which are 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
Limitations Which Apply Are N/A These units must be operated within the catalogued environmental and application parameters. Determination of failure will be made by NOSHOK, Inc.'s equipment and personnel or a certified test facility specializing in this type of evaluation. Gauge failures determined to be caused by over-range, incompatibility with environment or product media and abuse will not be considered under this warranty. NOSHOK, Inc. will, at its discretion, repair or replace the working parts of the damaged gauge without cost to the customer.

In keeping with and for purposes of product and/or manufacturing process improvements, NOSHOK, Inc. reserves the right to make design changes without prior notice.
Distribution Manifolds N/A NOSHOK's Distribution Manifolds connect multiple instruments to one diaphragm seal, eliminating multiple connections that lead to possible leak paths.
Mechanical Switches Options & Accessories N/A Factory Adjusted Switch Point (Specify)
Pressure Snubbers - Piston Type N/A
  • Resist clogging and are self-cleaning
  • Five different sized pistons included with each snubber to ensure the correct amount of snubbing for virtually 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"
Pressure Snubbers - Sintered Type N/A
  • 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
Steam Syphons N/A
  • 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 at 850 ºF
Swivel Adapters N/A
  • Temperature ratings: 15,000 psi at 200 ºF and 3,000 psi at 1,000 ºF
  • Used with gauges and gauge valves to adjust the line of sight
  • Rotates 360º 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.
Contact Rating N/A 6A @ 12/24 Vdc 6A @ 125/250 Vac
Process Connection Size N/A 1/4 in N/A 1/4 in N/A 1/4 in N/A 7/16-20 N/A 7/16-20
  • 1 Depending on Adjustment Range