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Traceable Calibration
& Metrology
Calibration services with traceability to national/international standards. CMM inspection (500×500×300 mm, 1.5 μm resolution), optical & contact profilometry, and onsite/in-lab calibration for testing equipment, production gauges, and quality instruments.
Dimensional Calibration
Linear Measurement. Gauges. Slip Gauges. Thread & Plain Gauges.
Calibration of dimensional measuring instruments traceable to National Physical Laboratory (NPL) India and international standards. Controlled environment: 23±2°C, 50±10% RH.
| Instrument | Range | Standards |
|---|---|---|
| Vernier Caliper | 0–300 mm | IS 3651, ISO 13385 |
| Outside Micrometer | 0–300 mm | IS 2967, ISO 3611 |
| Inside Micrometer | 25–300 mm | IS 2967 |
| Depth Micrometer | 0–150 mm | IS 2967 |
| Height Gauge | 0–600 mm | IS 6060 |
| Dial Gauge / Indicator | 0–25 mm | IS 2921, ISO 463 |
| Bore Gauge | 18–150 mm | — |
| Feeler Gauge | 0.02–1.0 mm | IS 1706 |
| Steel Rule | 0–1000 mm | IS 1485 |
| Measuring Tape | 0–30 m | IS 1270 |
| Thread Plug/Ring Gauge | Various | IS 6210 |
| Plain Plug/Ring Gauge | Various | IS 3455 |
| Slip Gauge / Gauge Blocks | Grade 0, 1, 2 | IS 2984, ISO 3650 |
CMM & Surface Profilometry
Coordinate Measurement. Optical & Contact Profilometry.
High-accuracy 3D dimensional inspection and surface texture measurement. Controlled environment (23±1°C) ensures measurement traceability and repeatability for critical component verification.
Coordinate Measuring Machine (CMM)
Bridge-type CMM with motorised touch-trigger probe and PC-DMIS measurement software. Capable of fully automated measurement routines with GD&T reporting to ISO 1101.
Slant Bridge CMM — 500×500×300mm measurement envelope, 1.5 µm resolution
Measurement Envelope
500 mm × 500 mm × 300 mm (X × Y × Z) — accommodates medium-to-large precision components including flanges, valve bodies, turbine blades, and machined housings.
X: 500 mm • Y: 500 mm • Z: 300 mm
Resolution & Accuracy
Probe resolution of 1.5 μm (1.5 micron). Maximum Permissible Error (MPE-E) compliant with ISO 10360-2. Thermal stabilisation to ±0.5°C reduces thermal expansion errors on ferrous components.
Resolution: 1.5 μm • ISO 10360-2
Software & Reporting
PC-DMIS with GD&T evaluation per ISO 1101 / ASME Y14.5. Outputs include colour deviation maps, first-article inspection (FAI) reports (AS9102), and SPC data export.
GD&T • FAI / AS9102 • SPC
| CMM Application | Measurands | Industries |
|---|---|---|
| Dimensional Verification | Length, diameter, radius, angle, flatness, straightness | Automotive, Aerospace, General Engineering |
| GD&T Inspection | Circularity, cylindricity, perpendicularity, true position, runout | Precision machined parts, OEM suppliers |
| First Article Inspection (FAI) | Full dimensional report to drawing, AS9102 ballooning | Aerospace (NADCAP), Automotive PPAP |
| Bore & Thread Geometry | Thread pitch diameter, minor/major diameter, lead angle | Fasteners, valves, pipe fittings |
| Profile & Contour | Free-form surface comparison to CAD/nominal | Turbine blades, impellers, casting patterns |
| Gauge & Fixture Certification | Go/No-Go gauge qualification, fixture certification | Tool rooms, production quality control |
Surface Profilometry — Optical & Contact
Two complementary profilometer platforms covering the full range of surface roughness and texture measurement — from polished optical surfaces (Ra < 0.01 μm) to rough castings and coatings.
White Light Interferometry / Focus Variation
- › Vertical resolution: <1 nm on polished surfaces
- › 3D areal surface texture (Sa, Sq, Sz, Ssk, Sku) per ISO 25178
- › No surface contact — ideal for soft, delicate, or coated surfaces
- › Rapid full-field mapping; no line-scan limitation
- › Colour deviation and step-height measurement on thin films
Best For: Lapped/ground/polished surfaces, coatings, optical components, MEMS
Stylus Profilometer — Diamond Tip Stylus
- › Vertical resolution: 0.8 nm (Z-axis); stylus tip radius 2 μm
- › 2D roughness profiles: Ra, Rz, Rt, Rq, Rsk, Rku per ISO 4287 / ASME B46.1
- › Step height, waviness (Wa, Wz), and primary profile measurement
- › Effective on rough, matte, and non-reflective surfaces
- › Traceable calibration against certified reference specimens
Best For: Machined/turned surfaces, castings, weld toes, bearing races, cylinder bores
| Profilometry Application | Parameters Reported | Standard | Typical Industry |
|---|---|---|---|
| Machined Surface Acceptance | Ra, Rz, Rmax | ISO 4287, ASME B46.1 | Automotive, Aerospace, OEM |
| Bearing & Sealing Surface | Ra, Rsk (skewness), Rku (kurtosis) | ISO 4287 | Compressors, Pumps, Engines |
| Areal 3D Texture (Sa, Sq) | Sa, Sq, Sz, Ssk, Sku, Sdq, Sdr | ISO 25178 | Optical components, MEMS, Precision parts |
| Coating / Film Thickness | Step height, film uniformity | ISO 25178 | Electronics, PVD/CVD coatings |
| Weld Toe Profile | Weld toe angle, undercut depth | ISO 5817 | Structural steel, Pressure vessels |
| Cylinder Bore Honing | Rpk, Rvk, Mr1, Mr2 (Abbott curve) | ISO 13565 | Automotive — engine blocks, liners |
Mechanical Calibration
Hardness Testers. Force Machines. Torque & Weighing Instruments.
Force, hardness, torque, and mass calibration against traceable reference standards. Calibration certificates include as-found and as-left data.
| Instrument | Range | Standards |
|---|---|---|
| Rockwell Hardness Tester | HRA, HRB, HRC | ASTM E18, IS 1586 |
| Brinell Hardness Tester | HBW | ASTM E10, IS 2281 |
| Vickers Hardness Tester | HV 1–HV 100 | ASTM E92, IS 1754 |
| Micro-Hardness Tester | HV 0.01–HV 1 | ASTM E384 |
| Universal Testing Machine (UTM) | 1 kN–1500 kN | ASTM E4, IS 1828 |
| Impact Testing Machine | Charpy/Izod | ASTM E23, IS 3766 |
| Torque Wrench | Various ranges | ISO 6789 |
| Spring Balance / Weighing Scale | Various | IS 9281 |
| Electronic Balance | 0.001 g–30 kg | — |
| Proving Ring | Various | IS 4169 |
| Load Cell | Various | ASTM E74 |
| Force Gauge | Various | — |
Thermal Calibration
Thermocouples. RTDs. Ovens, Furnaces & Environmental Chambers.
Temperature instrument calibration from cryogenic to 1200°C. Verification of laboratory ovens, muffle furnaces, autoclaves, and environmental chambers against traceable reference thermometers.
| Instrument | Range | Standards |
|---|---|---|
| Thermocouple (K, J, T, R, S, N) | −200°C to +1200°C | IEC 60584, IS 12072 |
| RTD / Pt-100 | −100°C to +500°C | IEC 60751 |
| Digital Thermometer | −50°C to +300°C | — |
| Infrared Thermometer | −30°C to +500°C | — |
| Laboratory Oven / Hot Air Oven | Ambient to 300°C | — |
| Muffle Furnace | Up to 1200°C | — |
| Environmental Chamber | −40°C to +180°C | — |
| Water Bath | Ambient to 100°C | — |
| Autoclave | 121°C, 134°C | — |
| Temperature Indicator/Controller | Various | — |
Pressure & Flow Calibration
Pressure Gauges. Transmitters. Vacuum & Dead Weight Testers.
Pressure calibration from vacuum to 700 bar. Deadweight tester as primary reference. Certificates include as-found/as-left readings and expanded measurement uncertainty.
| Instrument | Range | Standards |
|---|---|---|
| Pressure Gauge (Bourdon) | 0–700 bar | IS 3624 |
| Digital Pressure Gauge | Various | — |
| Pressure Transmitter | 0–400 bar | — |
| Vacuum Gauge | 0 to −1 bar | — |
| Dead Weight Tester | Various | IS 8267 |
Electrical Calibration
Multimeters. Clamp Meters. Insulation & Earth Resistance Testers.
| Instrument | Parameters Calibrated |
|---|---|
| Multimeter | Voltage (V), Current (A), Resistance (Ω) |
| Clamp Meter | AC/DC current |
| Insulation Tester (Megger) | Mega-ohm resistance (MΩ) |
| Earth Resistance Tester | Earth/ground resistance |
| Power Analyser | Active power (W), Apparent power (VA), Power factor (PF) |
Calibration Process
Four-Step Traceable Calibration Workflow
Every instrument processed through a documented, ISO/IEC 17025-compliant workflow with full uncertainty estimation and traceable certificate issue.
Receipt & Identification
Instrument logged into the Laboratory Information Management System (LIMS). Unique calibration ID assigned. Condition noted on receipt — any anomalies recorded before work begins.
Calibration
Performed against traceable reference standards in a temperature- and humidity-controlled environment (23±2°C, 50±10% RH). Multiple measurement points recorded. Reference standards bear valid NPL traceability.
Uncertainty Estimation
Measurement uncertainty calculated per ISO/IEC 17025 and JCGM 100:2008 (GUM). All sources of uncertainty — repeatability, reference standard uncertainty, resolution, temperature effects — are combined and reported as expanded uncertainty (k=2, ~95% confidence).
Certificate Issue
Calibration certificate issued with complete traceability chain, as-found and as-left data, expanded measurement uncertainty, calibration date, and next recommended calibration due date.
Controlled environment: Our calibration laboratory is maintained at 23±2°C and 50±10% RH as required by dimensional and mechanical calibration standards. Temperature and humidity are continuously monitored and logged. Calibration is performed only within the specified environmental window.
Onsite Calibration
We Bring the Reference Standards to Your Site
Large or fixed equipment that cannot be transported — UTMs, hardness testers, furnaces, pressure systems — calibrated at your facility. Our engineers carry traceable reference standards and issue calibration certificates on-site.
UTM Calibration at Your Facility
Force verification of Universal Testing Machines per ASTM E4 and IS 1828 using traceable deadweight force standards. Full load range verification, multiple loading directions. Certificate issued per ASTM E4 requirements.
Hardness Tester Calibration
Rockwell, Brinell, and Vickers hardness tester calibration using certified hardness reference blocks (CRMs) traceable to national standards. Verification of test force and indenter geometry. Portable hardness testers also calibrated.
Temperature Instrument Calibration
Calibration of thermocouples, RTDs, and temperature indicators in-situ. Oven, furnace, autoclave, and environmental chamber verification across the full working temperature range using traceable reference thermometers.
Pressure Gauge Calibration
Pressure gauges, transmitters, and pressure controllers calibrated onsite using portable deadweight testers and reference pressure gauges. Coverage from vacuum to high-pressure process lines.
Dimensional Gauge Calibration
Calibration of production floor dimensional instruments — vernier calipers, micrometers, dial gauges, height gauges, bore gauges, and gauging fixtures — using portable slip gauge sets and reference standards.
Annual Calibration Contracts
Scheduled annual calibration programmes for manufacturing plants and quality laboratories. We manage your calibration register, send due-date reminders, and maintain calibration records for audit readiness under IATF 16949, ISO 9001, and GMP requirements.
Industries Served
Calibration for Quality-Critical Sectors
Traceable calibration certificates accepted by audit bodies, third-party inspectors, and regulatory authorities across all major industrial sectors.
Manufacturing & Quality Labs
ISO 9001 and IATF 16949 gauge calibration requirements. Production floor instruments and quality lab equipment.
Automotive (IATF 16949)
MSA studies, gauge R&R support, traceable calibration of dimensional and mechanical instruments per IATF 16949 clause 7.1.5.1.
Pharma (GMP Calibration)
Calibration of autoclaves, temperature-controlled storage units, analytical balances, and process instruments as required under Schedule M and WHO GMP.
Construction & Infrastructure
Calibration of compression testing machines, cube moulds, UTMs, and dimensional instruments used in civil and structural material testing.
Oil & Gas
Pressure gauge calibration, temperature instrument verification, dimensional gauging, and hardness tester calibration for upstream, midstream, and downstream facilities.
Power Plants
Calibration of temperature, pressure, and mechanical instruments used in thermal, hydro, and nuclear power plant quality systems. Audit-ready traceable certificates.
Aerospace
Precision dimensional and mechanical calibration with full traceability documentation required for AS9100 / NADCAP-supporting quality systems.
Food Processing
Calibration of weighing balances, temperature instruments, pressure gauges, and process sensors for HACCP, FSSC 22000, and BRC-compliant quality systems.
Calibration by Instrument Class
Scope of our calibration services
Dimensional
PMI verification (XRF/OES) of piping, vessels, and heat exchangers during planned outages. Hardness surveys, replica metallography, and dimensional checks. Rapid screening to prioritise lab-confirmation samples.
Force & Torque
Load cell calibration, proving rings, torque wrenches, force gauges. Calibration per ISO 376, ASTM E4 for testing machine verification.
Temperature
Thermocouple calibration, furnace uniformity surveys (AMS 2750), temperature controllers, data loggers. Critical for heat treatment and elevated-temp testing compliance.
Pressure
Pressure gauges, transducers, dead-weight testers. Calibration across vacuum to high-pressure ranges per facility requirements.
Uncertainty, Traceability & Certificates
What our calibration certificates include
Calibration & Measurement Capability (CMC)
Best measurement uncertainty stated for each parameter. All calibrations performed within the declared CMC. Uncertainty budgets available on request.
Metrological Traceability
Unbroken chain of comparisons to national/international standards (NPL India, NIST). Reference standards calibrated by higher-order laboratories with documented traceability.
Certificate Format
Standard-specific calibration certificates with: instrument identification, reference standards used, environmental conditions, measurement results, expanded uncertainty (k=2), and due-date recommendations.
Instrument Intake Guidelines
- Ship instruments in protective packaging with calibration request form
- Include previous calibration certificate (if available) for history tracking
- Specify required calibration points if different from standard schedule
- Typical turnaround: 5–7 working days. Express 2–3 days available
5–7 Days
Standard Turnaround
2–3 Days
Express Available
ISO 17025
Reports
Related Services
Capabilities
200+ instruments, 900+ test parameters across all testing disciplines
Onsite Testing & PMI
Portable hardness, PMI, field NDT, and on-location material verification
Metals Testing
Mechanical, chemical, and metallographic testing of ferrous and non-ferrous metals
Contact Us
Request a quote, discuss your requirements, or schedule a lab visit
Need Calibration Certificates for Your Instruments?
Send us your instrument list or call to discuss an onsite calibration visit. We issue traceable calibration certificates with full documentation for audits, IATF, GMP, or customer requirements.