Vernier Caliper
Calibrate digital and analog vernier calipers for dimensional inspection to ISO 17025.
Standards
ISO 3599, ASME B89.1.14, ISO/IEC 17025
Typical Interval
12 months
Uncertainty Range
±0.005 mm
What Is Vernier Caliper?
Vernier calipers are the most widely used dimensional measurement tool in manufacturing and QC. Calibration verifies accuracy of external, internal, depth, and step measurements at multiple points across the measurement range.
Both accuracy and linearity are checked — critical for manufacturing parts to specified dimensional tolerances.
Applicable Standards
Primary standards: ISO 3599, ASME B89.1.14, ISO/IEC 17025
ISO/IEC 17025-accredited laboratories must maintain an unbroken traceability chain from the calibration result back to NIMT (Thailand's national metrology institute) or another internationally recognised NMI.
Typical Measurement Uncertainty
Expanded uncertainty is typically ±0.005 mm, depending on the measurement range, reference equipment used, and environmental conditions. The actual uncertainty will be stated on your calibration certificate.
Recommended Calibration Interval
A calibration interval of 12 months is generally recommended. The appropriate interval for your specific instrument depends on usage frequency, environmental exposure, and any applicable regulatory or customer requirements.
What Your Calibration Certificate Will Include
- Calibration results — instrument indication vs. reference value at each test point
- Error and expanded uncertainty (U) at k=2 (95% confidence level)
- Traceability chain to NIMT or a recognised NMI
- Environmental conditions during calibration (temperature, humidity)
- Calibration date, certificate number, and authorised signature
Find a Vernier Caliper Calibration Lab in Thailand
ThaiLabHub lists ISO 17025-accredited calibration laboratories across Thailand. Search our directory to find labs that offer vernier caliper services, with scope details, location, and contact information.
For Labs: Manage Vernier Caliper Jobs with LabSync
LabSync helps Thai calibration laboratories manage jobs, issue traceable certificates, calculate GUM uncertainty budgets, and generate Thai tax reports (PP30 + WHT) — all in one system.
Frequently Asked Questions
Why is it important to calibrate a Vernier Caliper?+
Dimensional measurements directly affect product conformance. A Vernier Caliper that is out of tolerance can cause reject rates to rise or allow non-conforming parts to pass inspection. Calibration verifies the instrument reads within ±0.005 mm and maintains traceability per ISO 3599, ASME B89.1.14, ISO/IEC 17025.
How often should a Vernier Caliper be calibrated?+
Most Vernier Calipers should be calibrated every 12 months under normal operating conditions. High-use environments, harsh conditions (vibration, temperature extremes), or regulatory requirements (FDA, GMP, ISO 17025) may necessitate more frequent calibration. Always follow the manufacturer's recommended interval as a baseline and consult your lab's quality plan.
What does a Vernier Caliper calibration certificate show?+
A calibration certificate issued under ISO/IEC 17025 includes: the instrument identification (make, model, serial number), the reference standards used (with their own traceability chain), the measurement points tested, before/after correction values, the expanded measurement uncertainty (±0.005 mm), the environmental conditions during calibration, the calibration date and next-due date, and the signature of the authorized calibration engineer. This certificate is the evidence required for audits and accreditation.
Labs offering dimensional calibration
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