Quality Assurance, Traceability & Buyer Protection
Every calibration instrument supplied by Dual Brothers is accompanied by authentic ISO/IEC 17025 accredited calibration certificates traceable to BIPM, NIST, and National Metrology Institutes under the international ILAC Mutual Recognition Arrangement (MRA).
ISO/IEC 17025 Accreditation
All calibration master instruments are calibrated in ISO/IEC 17025:2017 accredited laboratories with published Calibration and Measurement Capabilities (CMC) and certified uncertainty budgets.
ILAC MRA Mutual Recognition
Our calibration certificates are legally recognized across 100+ signatory nations (including NIST USA, UKAS UK, DAkkS Germany, NATA Australia, SAC Singapore, and SASO Saudi Arabia).
100% Pre-Dispatch Quality Check
Every unit undergoes an intensive 24-hour thermal and pressure burn-in cycle at our Chennai testing facility to verify control stability, sensor repeatability, and display resolution before shipment.
Insured Doorstep Air Express
Global air freight via DHL Express and FedEx Priority with 100% commercial cargo transit insurance, custom high-impact flight cases, and full customs clearance paperwork.
📐 The Unbroken Chain of Metrological Traceability
How measurements made with Dual Brothers calibrators trace directly back to fundamental International System of Units (SI) definitions:
Primary International SI Definitions (BIPM, Sèvres, France)
Fundamental realization of the Kelvin (Boltzmann constant k = 1.380649×10⁻²³ J/K), the Pascal (kg/(m·s²)), and the Second (Cs-133 hyperfine transition frequency). Standard ITS-90 fixed points realized in Primary Standard Laboratories.
National Metrology Institutes (NPL India / NIST USA / PTB Germany)
Realization of Triple Point of Water (TPW 0.0100°C), Gallium Melting Point (29.7646°C), and Primary Dead Weight Piston Gauges with uncertainties < 0.0001°C and < 0.001% of reading.
ISO/IEC 17025 Accredited Reference Laboratory
Calibration of Dual Brothers master SPRTs, quartz pressure transducers, and optical frequency synthesizers with direct calibration certificates and reported expanded uncertainty (k=2).
Dual Brothers Calibrators (DB Therion, DB Barion, DB Hygron, DB Pyrovia, DB Rotron)
Calibrated against ISO 17025 master standards. Each instrument is delivered with a factory calibration certificate stating exact as-found / as-left data and calculated measurement uncertainty.
Your Factory Floor & Laboratory Process Sensors (UUT)
Your industrial RTD probes, transmitters, dial pressure gauges, and tachometers calibrated using Dual Brothers calibrators achieve full ISO 9001, FDA, GMP, and regulatory compliance audit pass.
📋 Sample ISO/IEC 17025 Calibration Certificate Specifications
Every calibration certificate issued with Dual Brothers instruments includes these verified metrological parameters:
| Certificate Section | Standard Information Provided | Compliance Purpose |
|---|---|---|
| Certificate Number & QR Code | DB-CAL-2026-XXXX | Instant online verification & anti-counterfeiting tracking |
| Customer Details | Client Name, Facility Location, Purchase Order Reference | Asset traceability for ISO 9001 / IATF 16949 audits |
| Instrument Identification | Model (e.g. DB Therion 650), Serial No., Firmware Version | Exact physical serial tracking per EURAMET cg-13 |
| Environmental Conditions | Ambient Temp: 23.0°C ± 1.5°C | RH: 48% ± 5% | Pressure: 1013 hPa | Ensures stability criteria per JCGM 100 GUM requirements |
| Master Standards Used | Master SPRT S/N, Certificate No., Validity Date, NPL Traceability | Proves unbroken SI chain to National Physical Laboratory |
| Calibration Results Table | Nominal Point, Master Value, Instrument Reading, Error, Uncertainty (U) | As-found / As-left quantitative accuracy verification |
| Expanded Uncertainty | U = ± 0.035°C (Coverage factor k=2, 95.45% Confidence) | Mandatory requirement for pharmaceutical & aerospace audit |
| Authorized Signatures | Approved Metrology Signatory & Quality Manager Stamps | Full legal certification under ILAC MRA agreements |
🛡️ The Dual Brothers 5-Point Global Buyer Protection Guarantee
Designed to give overseas engineering managers 100% confidence when procuring instruments from Chennai, India.
1. Genuine OEM Guarantee
100% brand new, authentic instruments with factory serial verification.
2. Traceable Calibration
Full ISO 17025 accredited certificate included with every shipment.
3. Zero-Damage Air Transit
Custom foam-fitted flight cases and 100% insured DHL / FedEx express freight.
4. Customs & Duty Support
Correct HS codes (9031/9025) and Certificate of Origin for smooth clearance.
5. 1-Year Warranty & Support
Comprehensive 12-month replacement warranty and lifetime re-calibration support.