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300 Series Brass Case Liquid Filled Pressure Gauges

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  • High quality, heavy-duty liquid filled gauge
  • Vacuum and compound ranges through 0 psi to 15,000 psi
  • 2-1/2" and 4" gauge sizes
  • Die cast Brass case with natural Brass finish
  • Copper alloy or 316 Stainless Seel and Brass wetted parts
  • Ideal for applications including automotive, construction, hydraulics & pneumatics, mining, stamping & forming presses and transportation

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SIZES 25 2-1/2" 40 4"        
CASE TYPES 300 Brass, bottom connection 310 Brass, back connection        
PRESSURE RANGES 30vac -30 inHg to 0 psi 30/300 -30 inHg to 0 to 300 psi 300 0 psi to 300 psi 3000 0 psi to 3,000 psi
30/15 -30 inHg to 0 to 15 psi 15 0 psi to 15 psi 400 0 psi to 400 psi 5000 0 psi to 5,000 psi
30/30 -30 inHg to 0 to 30 psi 30 0 psi to 30 psi 600 0 psi to 600 psi 6000 0 psi to 6,000 psi
30/60 -30 inHg to 0 to 60 psi 60 0 psi to 60 psi 800 0 psi to 800 psi 7500 0 psi to 7,500 psi
30/100 -30 inHg to 0 to 100 psi 100 0 psi to 100 psi 1000 0 psi to 1,000 psi 10000 0 psi to 10,000 psi
30/160 -30 inHg to 0 to 160 psi 160 0 psi to 160 psi 1500 0 psi to 1,500 psi 15000 0 psi to 15,000 psi
30/200 -30 inHg to 0 to 200 psi 200 0 psi to 200 psi 2000 0 psi to 2,000 psi    
SCALE OPTIONS psi psi single scale psi/kPa psi/kPa dual scale psi/kg/cm2 psi/kg/cm2 dual scale psi/bar psi/bar dual scale
CONNECTION SIZES 1/4 1/4″ NPT 1/2 1/2" NPT SST SAE J1926-3:7/16-20 adjustable
OPTIONS CFF Chrome Front Flange RF Rear Flange GLO Glass Lens Overlay ST Stainless Steel Tagging
CFFN Chrome Front Flange w/o holes CCR Chrome Cover Ring SGO Safety Glass Overlay BT3 Brass Threaded Orifice 0.3 mm
BFF Brass Front Flange CBU Chrome Bezel & U-Clamp AR Adapter Ring BT4 Brass Threaded Orifice 0.4 mm
BLFF Black Front Flange MIP Maximum Indicating Pointer LM Laser Marking BT8 Brass Threaded Orifice 0.8 mm
SSRF 304SS Rear Flange LL Polycarbonate Lens        

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

If you are viewing on a smaller screen or with screen zoom, please use the horizontal scroll bar at the bottom of this table to see all information.

  SERIES SPECIFICATIONS
Pressure ranges 300 Series (all) Vacuum and compound ranges through 0 psi to 15,000 psi
Accuracy 25-300, 25-310 ±1.6% full scale
40-300, 40-310 ±1% full scale
Temperature ranges* 300 Series (all) Media -4 °F to 140 °F (-20 °C to 60 °C)
Ambient 0 °F to 160 °F (-18 °C to 71 °C)
Optional temperature ratings available from -40 °F to 212 °F (-40 °C to 100 °C)
Measuring element 25-300, 25-310
(≤ 600 psi)
Copper alloy “C” tube
25-300, 25-310
(800 psi to 6,000 psi)
Copper alloy coiled safety tube
25-300, 25-310
(7,500 psi to 15,000 psi)
316 stainless steel coiled safety tube
40-300, 40-310
(≤ 1,000 psi)
Copper alloy “C” tube
40-300, 40-310
(15,000 psi)
316 stainless steel coiled safety tube
Connection 25-300, 25-310 1/4" NPT die-cast brass with the case. 7/16" – 20 SAE adjustable type straight thread with FKM O-ring is also available as a stock option on many ranges (-4 SAE).
40-300, 40-310 1/4" NPT die-cast brass with the case. 1/2" NPT is available on certain 40-300 ranges as a stock option, and on all other 40-300 and 40-310’s as a non-stock option.
Case 300 Series (all) Die cast brass (natural brass finish) with safety relief plug
Cover ring 300 Series (all) Polished brass
Lens 300 Series (all) Acrylic with o-ring seal
Pointer 300 Series (all) Balanced aluminum, black finish
Dial 300 Series (all) Aluminum, white background with black scale.
UV resistant.
Movement 300 Series (all) Brass and nickel-silver with highly polished bearing surfaces
Fill liquid 300 Series (all) Glycerin

  * For every 18 °F (10 °C) shift in temperature from which the gauge is calibrated, the user can experience up to ±0.4% additional error.

Working Pressure Limitations

Dynamic Pressure
The working pressure should be limited to 60% of the dial range.

Static Pressure
The working pressure, where no sharp fluctuations occur, should be limited to 90% of the dial range.

Options & Accessories

AVAILABLE

  • Maximum Indicating Pointer (MIP)
  • Glass Lens Overlay (GLO)
  • Safety Glass Overlay (SGO)
  • Chrome Front Flange (CFF)
  • Chrome Front Flange w/o Holes (CFFN)
  • Brass Front Flange (BFF)
  • Rear Flange (RF)
  • Chrome Cover Ring (CCR)
  • Increased Accuracy from 1.5% to 1.0% (IA)
  • SAE J1926-3:7/16-20 Adjustable Connection (SST)*
  • 10-32-UNF-2B (10-32)
  • Orifice - Brass Threaded 0.3mm (BT3)
  • Orifice - Brass Threaded 0.4mm (BT4)
  • Orifice - Brass Threaded 0.8mm (BT8) - Standard
  • Rubber Case Protectors (RCP)
  • Laser Marking (LM)
  • Stainless Steel Tagging (ST)

GAUGE FILL OPTIONS

  • Silicone (SL)
  • Halocarbon (HL)
  • -40 Degree Service (GY40)
  • Mineral Oil (MO)

CERTIFICATES

  • Certified Calibration (CC)
  • Cleaning for Oxygen Service (O2), Up to 1,000 psi
  • Cleaning for Oxygen Service (O2), 1,500 psi and up

* Includes FKM O-ring. Consult factory for availability.

NOTE:  Consult factory for any Minimum Quantities that may apply when ordering these accessories.

Prop 65

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

  • Chrome Adaptor Ring (25-13-1-CHROME-AR)
  • Rubber Case Protector (25-123459-0-RCP)
  • Certificate of Cleaning (COCL)
  • Certificate of Conformance (COC)

AVAILABLE

  • Maximum Indicating Pointer (MIP)
  • Glass Lens Overlay (GLO)
  • Safety Glass Overlay (SGO)
  • Chrome Front Flange (CFF)
  • Chrome Front Flange w/o Holes (CFFN)
  • Brass Front Flange (BFF)
  • Rear Flange (RF)
  • Chrome Cover Ring (CCR)
  • Chrome Bezel w/U-Clamp (CBU)
  • Adaptor Ring (AR)
  • Increased Accuracy from 1.5% to 1.0% (IA)
  • SAE J1926-3:7/16-20 Adjustable Connection (SST)*
  • 10-32-UNF-2B (10-32)
  • Orifice - Brass Threaded 0.3mm (BT3)
  • Orifice - Brass Threaded 0.4mm (BT4)
  • Orifice - Brass Threaded 0.8mm (BT8) - Standard
  • Rubber Case Protectors (RCP)
  • Laser Marking (LM)
  • Stainless Steel Tagging (ST)

GAUGE FILL OPTIONS

  • Silicone (SL)
  • Halocarbon (HL)
  • -40 Degree Service (GY40)
  • Mineral Oil (MO)

CERTIFICATES

  • Certified Calibration (CC)
  • Cleaning for Oxygen Service (O2), Up to 1,000 psi
  • Cleaning for Oxygen Service (O2), 1,500 psi and up

* Includes FKM O-ring. Consult factory for availability.

NOTE:  Consult factory for any Minimum Quantities that may apply when ordering these accessories.

Prop 65

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

  • Chrome Adaptor Ring (25-13-1-CHROME-AR)
  • Rubber Case Protector (25-123459-1-RCP)
  • Certificate of Cleaning (COCL)
  • Certificate of Conformance (COC)

AVAILABLE

  • Polycarbonate Lens (LL)
  • Safety Glass (SG)
  • Chrome Front Flange (CFF)
  • Chrome Front Flange w/o Holes (CFFN)
  • Brass Front Flange (BFF)
  • Black Front Flange (BLFF)
  • 304SS Rear Flange (SSRF)
  • Chrome Cover Ring (CCR)
  • Increased Accuracy from 1.0% to 0.5% (IA)
  • SAE J1926-3:7/16-20 Adjustable Connection (SST)*
  • 10-32-UNF-2B (10-32)
  • Orifice - Brass Threaded 0.3mm (BT3)
  • Orifice - Brass Threaded 0.4mm (BT4)
  • Orifice - Brass Threaded 0.8mm (BT8) - Standard
  • Rubber Case Protectors (RCP)
  • Laser Marking (LM)
  • Stainless Steel Tagging (ST)

GAUGE FILL OPTIONS

  • Silicone (SL)
  • Halocarbon (HL)
  • -40 Degree Service (GY40)
  • Mineral Oil (MO)

CERTIFICATES

  • Certified Calibration (CC)
  • Cleaning for Oxygen Service (O2), Up to 1,000 psi
  • Cleaning for Oxygen Service (O2), 1,500 psi and up

* Includes FKM O-ring. Consult factory for availability.

NOTE:  Consult factory for any Minimum Quantities that may apply when ordering these accessories.

Prop 65

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

  • Rubber Case Protector (40-123459-BLACK-RCP)
  • Certificate of Cleaning (COCL)
  • Certificate of Conformance (COC)

AVAILABLE

  • Polycarbonate Lens (LL)
  • Safety Glass (SG)
  • Chrome Front Flange (CFF)
  • Chrome Front Flange w/o Holes (CFFN)
  • Brass Front Flange (BFF)
  • Black Front Flange (BLFF)
  • 304SS Rear Flange (SSRF)
  • Chrome Bezel w/U-Clamp (CBU)
  • Increased Accuracy from 1.0% to 0.5% (IA)
  • SAE J1926-3:7/16-20 Adjustable Connection (SST)*
  • 10-32-UNF-2B (10-32)
  • Orifice - Brass Threaded 0.3mm (BT3)
  • Orifice - Brass Threaded 0.4mm (BT4)
  • Orifice - Brass Threaded 0.8mm (BT8) - Standard
  • Rubber Case Protectors (RCP)
  • Laser Marking (LM)
  • Stainless Steel Tagging (ST)

GAUGE FILL OPTIONS

  • Silicone (SL)
  • Halocarbon (HL)
  • -40 Degree Service (GY40)
  • Mineral Oil (MO)

CERTIFICATES

  • Certified Calibration (CC)
  • Cleaning for Oxygen Service (O2), Up to 1,000 psi
  • Cleaning for Oxygen Service (O2), 1,500 psi and up

* Includes FKM O-ring. Consult factory for availability.

NOTE:  Consult factory for any Minimum Quantities that may apply when ordering these accessories.

Prop 65

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

  • Rubber Case Protector (40-123459-BLACK-RCP)
  • Certificate of Cleaning (COCL)
  • Certificate of Conformance (COC)

NOSHOK offers multiple assembly options to meet your specific system requirements. Consult factory to discuss your customized solution.

NOSHOK offers a wide variety of standard & elevated pressure, and reduced pressure replaceable and non-replaceable diaphragm seals, designed to isolate and/or protect the pressure measuring instrument from corrosive, viscous, contaminated or very high temperature process media.

View NOSHOK's Diaphragm Seal offering

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

View NOSHOK Distribution Manifolds

  • Dual scale metric dials in psi/bar, psi/kPa and psi/kg/cm2 
  • Other scales are available for specific sizes and ranges, such as single scale bar and kPa, refrigerant scales and altitude scales
  • Customized special dials such as non-standard metric scale, tons of ram, lbs. of force, etc. are available in small quantities (as few as one piece) on some NOSHOK gauges

Please consult the factory for availability.

  • 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

  • Refrigeration gauges with dials reading in pressure and temperature are available in NOSHOK 300, 400 and 500 Series Pressure Gauges for R-12 and R-22
  • 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

  • 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

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