LC30 Digital Pressure Gauge

Brand: Ralston Instruments

An affordable panel mounted pressure gauge with high-end features, the new Field Gauge LC30 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.
  • Added customization
    • Easily switch from among 15 standard engineering units with the option to add your own and remove unneeded units 
  • Mounting flange
    • Allows for installation in a control panel without taking up too much room 
  • Back mounted pressure sensors
    • Make for easy panel mount installation
  • USB connection
    • Connect to calibration management software for live viewing of pressure, customization of engineering units, and calibration
  • AC mains powered with battery backup
    • Country adapters for North America, Europe, UK, Australia and China
  • ±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)
  • Quick, reliable Zero function
    • Using a single button
  • Convenient High / Low function
    • View highest and lowest pressure reached
  • Menu system
    • Allows access to additional controls
  • Made in the USA
    • Novelty, Ohio


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 50° F (-20° to 10° 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

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

Primary Power

  • AC Mains Power


  • 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. (255 g)

Process Connection

  • 1/4” Male NPT

Process Connection Location

  • Back Mount

Ingress Protection

  • IP67


  • Panel Mounted


  • 120/240 Vac with Battery Backup

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