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Flow Meter Calibration Laboratory: Certified Facilities for Instrument Validation
Quick Answer: Silver Instruments operates an ISO/IEC 17025 accredited flow calibration laboratory in Nanjing. Every Coriolis, electromagnetic, ultrasonic, vortex, oval gear, and thermal mass flow meter ships with a traceable calibration certificate generated in house. This removes third-party delays and gives you direct proof of accuracy the moment the meter reaches your site.
Why We Run Our Own Calibration Lab
Many flow meter brands send instruments to external labs. We do not. Our Nanjing facility houses multiple test rigs that run two shifts each day, giving us total control over turnaround time and data integrity. Here is the thing: an outsourced calibration often arrives with a generic three-point certificate on cold water only. Most engineers skip this part, but that generic data means very little for hot diesel or viscous resin. We have seen this on customer sites many times. A Coriolis meter checked only on water drifted by 1.5 percent on hot crude oil. Our in-house approach lets us match calibration media closer to your actual process fluid.
Inside Our Nanjing Calibration Hall
The lab covers 400 square meters and holds three primary calibration rigs. The gravimetric rig handles Coriolis mass flow meters from DN2 to DN200, using a Sartorius industrial scale with 0.05 percent mass uncertainty. We validate at flow rates up to 40 000 kg/h for water and 25 000 kg/h for oil, at 5 °C to 120 °C and line pressures up to 40 bar. The volumetric rig covers electromagnetic and vortex meters from DN15 to DN600, comparing meter output against a calibrated magnetic reference meter with 0.1 percent linearity. For thermal mass flow meters and small gas vortex meters, a compressed air rig delivers up to 300 Nm3/h with nitrogen-traceable reference sensors. Oval gear and positive displacement meters go through a dedicated oil loop. Last year a paint manufacturer in Indonesia sent us ten oval gear meters for recalibration. We found a drift of 2.3 percent after one year on high-viscosity resin at 1200 cP. Because the lab runs 24/5, we also support quick recalibration batches for water treatment plants in Saudi Arabia and food factories in Thailand.
Calibration Certificate That Works for Your Audit
Every meter we ship includes a PDF and hard copy calibration certificate signed by our lab supervisor. The document lists as-found and as-left data sets, five flow points from 10 percent to 100 percent of ran
Traceability Chain: From Our Lab to Your Site
Traceability is not just a label. Our master flow meters and reference weights return to the National Institute of Metrology in Beijing every 12 months. For selective rigs we also cross-check against PTB calibrations for European and Middle Eastern clients. A magnetic flow meter calibrated for a desalination plant in Oman is traceable all the way to SI units through NIM or PTB. In practice, your instrument engineer can pull up the full chain without guesswork.
Five Questions Engineers Ask Before Ordering
1. What is your fastest turnaround for a batch of 12 magnetic flow meters?
Standard calibration takes 3 business days after final assembly. Express service ships within 24 hours.
2. Can you calibrate with my actual process fluid?
If the fluid is safe and you can supply 200 liters, yes. We have calibrated with glycol mixes and light fuel oil. Default media are water, diesel, or compressed air.
3. Do you recalibrate meters from other brands?
Yes. We provide recalibration for most industrial flow meter brands. Ship your instrument to Nanjing and we return it with a new certificate.
4. What details do you need to quote a calibration run?
Send us fluid type, pipe size DN, flow range in kg/h or m3/h, operating temperature, pressure, and required accuracy class. We reply with a fixed price the same business day.
5. Will your calibration certificate satisfy Australian MID or ATEX requirements?
A calibration certificate is not an ATEX or MID approval document. But our lab works alongside the ATEX and IECEx certified production line. We supply the calibration evidence needed for your overall compliance package in Australia or the EU.
To request a calibration quotation or schedule a factory visit, contact Silver Instruments at [email protected] or call +86-135-1213-1526. You can also reach us on WhatsApp at 86-135-12131526 or WeChat at +86 13512131526. Please include your fluid, pipe size DN, flow range, temperature, and pressure. That gives us everything needed to return a precise price and lead time without back-and-forth emails.
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