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Process Gauge Pressure Products
Process gauges are more accurate with Dial sizes in the 4" to 6" range.  AS&I offers exceptional quality in this area of pressure gauges.
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Accredited Calibration for Pressure Gauges

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Receive your Pressure Gauge fully calibrated to ISO 17025 Standards from our A2LA accredited lab.

Alabama Scale & Instrument, Inc. is an accredited calibration lab to ISO/IEC 17025 and ANSI/NCSL Z540-1. Accreditation by A2LA ensures that AS&I not only has a registered quality system, but more important, proves competence to perform the work.

Calibration certificate includes Before & After Data as well as meets all requirements of ISO/IEC 17025 & ANSI/NCSL Z540-1 for content and calibration procedure.

Prices are for equipment purchased from AS&I only.

Model 4501 Bottom Connected or Model 4502 Back Connected Process Gauge

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Standard features include Overload and Underload Stops, Knif Blade Pointer For Precision Readings, Hermetically Sealed / Weather Proof, and they are Liquid Fillable with NO Kit Required!
  • Dial size: 4 1/2" Diameter
  • Connection Size - 1/4" or 1/2" NPT 
  • Case: Phenolic-Solid Front / Blow Out Back
  • Lens: Plastic with Gasket
  • Pointer: Knife Edge, Micro-Adjustable
  • Bourdon Tube & Socket: AISI 316 Stainless Steel
  • Movement: 304ss Heavy Duty Bushed
  • Accuracy: 0.5% Full Scale (ANSI Grade 2A)
Click here for specifications

Model 4501-SC Stainless Steel Bottom Connected Process Gauge

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Standard features include Overload and Underload Stops, Knif Blade Pointer For Precision Readings, Hermetically Sealed / Weather Proof, and they are Liquid Fillable with NO Kit Required!
  • Dial size: 4 1/2" Diameter
  • Connection Size - 1/4" or 1/2" NPT 
  • Case: Stainless Steel Solid Front / Blow Out Back
  • Lens: Plastic with Gasket
  • Pointer: Knife Edge, Micro-Adjustable
  • Bourdon Tube & Socket: AISI 316 Stainless Steel
  • Movement: 304ss Heavy Duty Bushed
  • Accuracy: 0.5% Full Scale (ANSI Grade 2A)
Click here for specifications

Model 4504 & 6504 Back Connected Panel Mounting Process Gauge

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Standard features include Solid Front with Pressure Relief Opening to ASME B40.1, Solid Wall between Pointer & Pressure Sensing Element for Safety, Front Open Lens for Easy Access.
  • Dial size: 4 1/2" or 6" Diameter
  • Connection Size - 1/4" or 1/2" NPT 
  • Case & Ring: Aluminum with Black Enamel
  • Lens: 4 1/2" = Polycarbonate,  6" = Glass
  • Pointer: Anodized Aluminum with Black Finish
  • Bourdon Tube & Socket: Stainless Steel, Brass or Monel K-500
  • Movement: Stainless Steel, Brass or Monel K-500
  • Accuracy: 0.5% Full Scale (ANSI Grade 2A)
Click here for specifications