LC20 Digital Pressure Gauge

Brand: Ralston Instruments

An affordable pressure gauge with high-end features, the new Field Gauge LC20 line of digital pressure gauges was designed with the user in mind. 

They are compact, tough, and reliable with customization options to help you simplify your work and get the job done quickly and accurately.
  • Accurate & Durable
    • ±0.1% full scale accuracy (ASME B40.100 Grade 4A/ISO Class 0.1)
    • Increased visibility - large, easy-to-read display with intuitive controls and bright backlight
    • Exceptional durability - withstands abuse and cracking and is waterproof to 1 meter (IP67)
  • Fast, Customizable Operation
    • Added customization - easily switch from among 15 standard engineering units with the option to add your own and remove unneeded units
    • Quick, reliable Zero function using a single button
    • Convenient High / Low function that allows the user to see the highest and lowest pressure reached
    • Menu system allows access to additional controls
  • Easy to Use, in Multiple Pressure Ranges
    • USB connection to connect to calibration management software for live viewing of pressure, customization of engineering units, and calibration
    • Available in 11 pressure ranges from 5 psi / 35 kPa to 10,000 psi / 70 MPa, a compound vacuum/pressure gauge from negative to positive 15 psi, and a digital vacuum gauge measuring up to 30 inHg / 760 mbar
    • Made in the USA


Maximum Pressure

  • 5 to 10,000 psi (34 mbar to 700 bar, 30 kPa to 70 MPa)

Pressure Measurement Uncertainty

  • ± 0.1 % of Full Scale (ASME B40.100 Grade 4A/ISO Class 0.1)

Measurement Type

  • Gauge Vacuum
  • Gauge Pressure, Gauge Vacuum
  • Gauge Pressure

Operating Temperature

  • -4° to 122° F (-20° to 50° C)

Material of Construction

  • ABS / Polycarbonate Blend, Powder-Coated Aluminum

Calibration Certificate

  • NIST traceable (Included)

Certifications & Approvals

  • Electromagnetic Compatibility Directive 2014/30/EU
  • Low Voltage Directive 2014/35/EU
  • Pressure Equipment Directive 2014/68/EU
  • CSA

Ingress Protection

  • IP67

Process Connection

  • 1/4” Male NPT

Process Connection Location

  • Bottom Mount

Wetted Material

  • 316 Stainless Steel

Media Compatibility

  • Skydrol, Windshield washer fluid, Transmission fluid, Light motor oil, Ralston Calibration Oil
  • Air, Inert Gas, Natural Gas, Petroleum-based Oil, Water, Alcohol, Antifreeze, Ethylene Glycol, Hydraulic Oil, Mineral Oil
  • Air, Inert Gas, Natural Gas, Petroleum-based Oil, Water


  • AA Alkaline (IEC LR6), 1,000 Hours

LCD Display

  • 2.4 in (61 mm) Segmented LCD Display

Wrench Size

  • 7/8 in (23 mm)


  • L 1.75 in (45 mm), W 3.4 in (87 mm), H 4.1 in (11 cm)


  • 12.6 oz. (355 g)

  • Pressure Calibration Testing of Process Gauges
  • Hydrostatic Pressure Leak Testing
  • Pressure Monitoring and Data Logging

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