Pressure Gauge Dial: Diameter 40mm to 250mm

Component Specifications

Definition

The pressure gauge dial is a precision-engineered circular component that serves as the visual interface for pressure measurement instruments. It consists of a calibrated scale with numerical markings (typically in psi, bar, kPa, or MPa), graduations for precise reading, and mounting provisions for the pointer mechanism. The dial converts the mechanical movement of the Bourdon tube, diaphragm, or capsule into readable pressure values through angular displacement of the pointer relative to the fixed scale.

Working Principle

The dial operates on the principle of angular displacement translation. As the pressure-sensing element (Bourdon tube, diaphragm, or capsule) deforms under pressure, it causes rotational movement through a gear mechanism. This rotation is transferred to the pointer, which moves across the calibrated scale on the dial. The dial's graduations are precisely spaced according to the gauge's measurement range and accuracy class, allowing users to read pressure values by observing the pointer position relative to the scale markings.

Materials

Aluminum alloy (typically 6061 or 5052), stainless steel (304 or 316), polycarbonate, or acrylic with UV-resistant coatings. Scale markings are applied through screen printing, etching, or laser marking with high-contrast, durable inks.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	40mm to 250mm
Scale Type	Single scale, dual scale (psi/bar), or color-coded zones
Scale Range	0-100 psi to 0-10,000 psi (or equivalent metric ranges)
Mounting Type	Center hole, clamp ring, or adhesive
Accuracy Class	0.5%, 1.0%, 1.6%, 2.5%
Graduation Interval	Varies by range (e.g., 1 psi, 5 psi, 10 psi)
Environmental Rating	IP54, IP65, or NEMA 4X

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 5171, DIN 16005, ASME B40.100

Parent Products

This component is used in the following industrial products

Pressure Gauge and Relief Valve

A combined monitoring and safety device that measures fluid pressure and prevents overpressure conditions in the mud mixing and pumping system.

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Engineering Analysis

Risks & Mitigation

Misreading due to parallax error
Scale fading from UV exposure
Pointer sticking or binding
Inaccurate calibration
Material degradation in corrosive environments

FMEA Triads

Trigger: Improper material selection for environment
Failure: Scale markings fade or dial corrodes
Mitigation: Use UV-resistant coatings and corrosion-resistant materials (stainless steel, proper plastics)

Trigger: Poor manufacturing tolerances
Failure: Inaccurate pressure readings
Mitigation: Implement strict quality control, calibration verification, and compliance with ISO 5171

Trigger: Mechanical stress during installation
Failure: Dial warping or pointer misalignment
Mitigation: Follow proper installation procedures, use appropriate mounting hardware, avoid overtightening

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5% to ±2.5% of full scale depending on accuracy class

Test Method

Calibration against deadweight tester or reference standard, verification of scale linearity and graduation accuracy, environmental testing per ISO 5171

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Pressure Gauge Dial

Manufacturer profiles associated with Pressure Gauge Dial.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What are the main types of pressure gauge dials?

Main types include single-scale dials (one unit system), dual-scale dials (two unit systems like psi/bar), color-coded dials (with safe/unsafe zones), and digital-analog hybrid dials with LCD displays.

How do I select the right dial for my pressure gauge?

Consider measurement range, accuracy class, environmental conditions (temperature, humidity, chemicals), readability requirements, and compliance with industry standards like ASME B40.100 or DIN 16005.

Can pressure gauge dials be customized?

Yes, dials can be customized for specific ranges, units, colors, logos, and special markings. Customization must maintain calibration accuracy and comply with relevant standards.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Pressure Gauge Dial