Pointer & Dial: Dial Diameter 40mm to 250mm

Component Specifications

Definition

The pointer and dial assembly is a critical visual interface component of a pressure gauge, consisting of a calibrated dial face with pressure markings and a movable pointer that rotates proportionally to pressure changes. This assembly translates mechanical movement from the gauge's sensing element into readable pressure values through angular displacement of the pointer against the graduated dial scale.

Working Principle

The pointer is mechanically linked to the gauge's movement mechanism (typically a Bourdon tube, diaphragm, or capsule). Pressure changes cause deflection in the sensing element, which is transmitted through gears or linkages to rotate the pointer. The pointer's angular position corresponds to specific pressure values marked on the stationary dial, allowing operators to read pressure through visual alignment.

Materials

Dial: Aluminum alloy, stainless steel, or polycarbonate with printed/etched markings. Pointer: Aluminum, brass, or stainless steel with counterweight. Pivot: Stainless steel or jewel bearing. Markings: Enamel, laser etching, or screen printing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Scale Range	-1 to 1000 bar (customizable)
Dial Diameter	40mm to 250mm
Accuracy Class	1.0, 1.6, 2.5 (per EN 837)
Pointer Length	Dial radius minus 2-5mm clearance
Rotation Angle	270-300 degrees full scale
Scale Division	Linear or logarithmic spacing
Environmental Rating	IP54 to IP67

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, EN 837, ASME B40.1, DIN 16005

Parent Products

This component is used in the following industrial products

Pressure Gauge

A measuring instrument that monitors and displays the pressure within the Continuous Starch Hydrocyclone Separator system.

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Engineering Analysis

Risks & Mitigation

Misreading due to parallax error
Scale fading from UV exposure
Pointer vibration causing reading difficulty
Magnetic interference affecting accuracy
Mechanical overpressure damaging movement

FMEA Triads

Trigger: Pivot bearing wear or contamination
Failure: Pointer sticks, jumps, or shows hysteresis
Mitigation: Use jewel bearings or sealed pivot assemblies; implement regular maintenance cleaning

Trigger: Dial marking degradation
Failure: Unreadable scale markings
Mitigation: Use chemical-resistant coatings; implement UV-protected materials; establish replacement schedules

Trigger: Mechanical overrange
Failure: Pointer bent or movement damaged
Mitigation: Install overpressure protectors; use stop pins; select gauges with 130% overrange capacity

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Pointer alignment tolerance: ±0.5° at zero and full scale; scale marking accuracy: ±1% of span

Test Method

Visual inspection per ISO 5171; calibration against deadweight tester; environmental testing per IEC 60068-2-6 (vibration) and IEC 60068-2-30 (damp heat)

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.

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Manufacturers of Pointer & Dial

Manufacturer profiles associated with Pointer & 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 causes pointer sticking or sluggish movement?

Pointer sticking typically results from friction in pivot bearings, contamination by process media, mechanical damage to gears, or magnetic interference in certain environments.

How often should pointer and dial be calibrated?

Calibration intervals depend on application criticality: typically 6-12 months for general industrial use, 3-6 months for critical processes, following ISO 9001 or industry-specific standards.

Can dial scales be customized for different units?

Yes, dials can be manufactured with dual scales (psi/bar, kPa/MPa), logarithmic scales, or application-specific markings for temperature, flow, or vacuum equivalents.

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.

Pointer & Dial