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Mechanical Pressure Gauges

Mechanical Pressure Gauges

Davis Instruments has a great selection of mechanical pressure gauges for the petro-chem, pulp and paper, wastewater, and other industrial applications. We stock absolute, gauge, vacuum, and differential gauges to fit any application you demand. Davis Instruments carries a wide variety of commercial gauges for general industrial use, industrial gauges for process line applications, sanitary guages for the food and beverage industry, and differential gauges for the HVACR industry. Whether it's a low-cost mechanical pressure gauge or an advanced digital pressure gauge with output, Davis Instruments has your application covered.

In 1849 the Bourdon tube pressure gauge was patented in France by Eugene Bourdon. It is still one of the most widely used instruments for measuring the pressure of liquids and gases of all kinds, including steam, water, and air up to pressures of 100,000 pounds per square inch. It uses a coiled tube connected to gears to control the dial which gives the pressure readout. If pressure increases, the tube uncoils, pushing the dial around the gauge. Conversely, if the pressure drops, the tube coils more tightly, and the dial is drawn back. This instrument design has been adopted throughout all industries. The American patent rights to Eugene Bourdon's gauge were bought by Edward Ashcroft in 1852. Ashcroft played an important role in the widespread adoption of steam power in this country.

To help you find the right analog pressure gauge for your application, use Davis Instrument's on-line search to help you shop by specification or by brand. Alternatively, contact our Application Specialists for free technical support. Let our experts help you find the right mechanical pressure gauge. Davis Insruments has over 75 years of experience in finding the right products for our customers.

To help you select an analog pressure gauge, the following tips my be helpful:

Pressure

Pressure is defined as the force applied over an area, such as the wall of a container or as part of a manufacturing process. The common English unit for pressure is pounds per square inch, or psi. To convert from psi to other units, see the conversion table below.

Common Pressure Units:

Psig (Gauge Pressure): a measure of pressure in psi that is referenced to ambient pressure.

Psia Absolute Pressure): a measure of pressure in psi that is referenced to zero absolute pressure.

Psid (Pressure Differential): a measure of the difference between two pressures.

This information may also be useful...

How To Pick a Pressure Gauge

If your system or process depends on pressure and vacuum being measured and controlled, it is imperative that the correct device is chosen. Long-term reliability and cost control depend on picking the right device for a specific application. For example, one would not buy a high-cost precision test gauge for an application involving pressure spikes and vibration. Major factors to consider are:

Process: the pressure sensing element will be exposed to the process media, so select a gauge material that is compatible with your process media. If the process media is corrosive or extreme over-pressure exists, a diaphragm may be required.

Pressure Range: normal pressure range dictates the full range of the gauge you need. ANSI B40 recommends that the operating pressure occurs in the middle half (20 to 75%) of the scale.

Environment: in some cases, the ambient environment can be more harmful to a gauge than the process itself. If vibration, caustic environment, or high operating and ambient temperatures exist, a more rugged, sealed gauge will be needed.

Accuracy: accuracy required for your process depends on the sensitivity of errors in your pressure measurement.

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Ashcroft Dual-Scale Low-Pressure Gauge 0 to 30" H2O and 0 to 7.5 kPa

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media not corrosive to beryllium copper, brass, polysulfone, and RTV silicone
  • Wetted materials: beryllium copper, brass, polysulfone, RTV silicone
Mfg Part# 25-1490-A-02L-XTU-30IW/KPA
DO-68930-02
In stock.
$68.25 USD/EACH
$54.60 USD/EACH

Qty:

Ashcroft 1490, Dual-Scale Vacuum Gauge 60" WC and 15 kPa

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media not corrosive to beryllium copper, brass, polysulfone, and RTV silicone
  • Wetted materials: beryllium copper, brass, polysulfone, RTV silicone
Mfg Part# 25-1490-A-02L-XTU-60IWV/KPA
DO-68930-32
In stock.
$76.50 USD/EACH
$61.20 USD/EACH

Qty:

Contractor's Pressure Gauge, 0 to 100 psi, 1/4" NPT(M)

  • Product Type: Process Gauges
  • Media compatibility: Brass and bronze
  • Wetted materials: brass & bronze
Mfg Part# EA14-C
DO-68060-58
In stock.
$34.00 USD/EACH
$28.90 USD/EACH

Qty:

Contractor's Pressure Gauge, 0 to 500 psi, 1/4" NPT(M)

  • Product Type: Process Gauges
  • Media compatibility: Brass and bronze
  • Wetted materials: brass & bronze
Mfg Part# EA14-G
DO-68060-66
Usually ships in 11 days.
$34.00 USD/EACH
$28.90 USD/EACH

Qty:

Ashcroft Dual-Scale Low-Vacuum Gauge 30" H2O to 0 and 0 to 7.5 kPa

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media not corrosive to beryllium copper, brass, polysulfone, and RTV silicone
  • Wetted materials: beryllium copper, brass, polysulfone, RTV silicone
Mfg Part# 25-1490-A-02L-XTU-30IWV
DO-68930-31
In stock.
$78.00 USD/EACH
$62.40 USD/EACH

Qty:

Wika 111.10, 2" Commercial Pressure Gauge, 0 to 15 psi, Lower Mount

  • Product Type: Commercial/Industrial Gauge
  • Wetted materials: copper alloy
  • Range: 0 to 15 psi
Mfg Part# 4252919
DO-68433-05
Available for order
or call 1-888-358-4712 to order
$11.75 USD/EACH

Qty:

Weksler UA, 1.5" Dual-Scale Gauge, 0 to 100 psi/0 to 700 kPa, Back

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media compatible with bronze or brass
  • Wetted materials: bronze tube, brass socket
Mfg Part# UA15C8C
DO-68345-22
Usually ships in 15 days.
$13.00 USD/EACH
$10.40 USD/EACH

Qty:

Ashcroft 1032 3.5" Sanitary Pressure Gauge 60 psig, 1.5" Tri-Clamp

  • Product Type: Sanitary Pressure Gauges
  • Wetted materials: 316L SS
  • Range: 0 to 60 psi
Mfg Part# 35-1032S-L-15L-60#
DO-68802-11
In stock.
$379.30 USD/EACH
$303.44 USD/EACH

Qty:

0 to 15 psi and 0 to 100 kPa Dual-Scale Gauge, Back Connection

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media compatible with 316 stainless steel
  • Wetted materials: 316 SS
Mfg Part# 63-1008-SL-02B-15#/KPA
DO-68007-22
Available for order
or call 1-888-358-4712 to order
$98.75 USD/EACH
$79.00 USD/EACH

Qty:

Low Pressure Gas Test Kit, 1/4 NPT(M) Connections, 35 WC

  • Product Type: Gas Test Kit
  • Qty/ea: 1
  • Manufacturer number: PLT35
Mfg Part# PLT35
DO-68058-74
Usually ships in 9 days.
$109.30 USD/EACH

Qty:

0 to 30 psi and 0 to 200 kPa Dual-Scale Gauge, Back Connection

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media compatible with 316 stainless steel
  • Wetted materials: 316 SS
Mfg Part# 63-1008-SL-02B-30#/KPA
DO-68007-23
Available for order
or call 1-888-358-4712 to order
$98.75 USD/EACH
$79.00 USD/EACH

Qty:

NSF-Certified Pressure Gauge, 0 to 30 PSI, Bottom Mount 1/4" NPT(M); 2" Dial

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media compatible with copper alloy
  • Wetted materials: copper alloy
Mfg Part# 50992563
DO-68049-01
In stock.
$18.75 USD/EACH

Qty:

NSF-Certified Pressure Gauge, 0 to 160 PSI, Bottom Mount 1/4" NPT(M); 4" Dial

  • Product Type: Commercial/Industrial Gauge
  • Media compatibility: any media compatible with copper alloy
  • Wetted materials: copper alloy
Mfg Part#
DO-68049-11
Available for order
or call 1-888-358-4712 to order
$21.25 USD/EACH

Qty:

Low Pressure Gas Test Kit, 1/4 NPT(M) Connections, 100 WC

  • Product Type: Gas Test Kit
  • Qty/ea: 1
  • Manufacturer number: PLT100
Mfg Part# PLT100
DO-68058-76
Usually ships in 9 days.
$109.30 USD/EACH

Qty:

Contractor's Pressure Gauge, 0 to 160 psi, 1/4" NPT(M)

  • Product Type: Process Gauges
  • Media compatibility: Brass and bronze
  • Wetted materials: brass & bronze
Mfg Part# EA14-D
DO-68060-60
Usually ships in 11 days.
$34.00 USD/EACH
$28.90 USD/EACH

Qty:

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