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Flow Meter Calibration System

Nagman’s Flow meter calibration systems are your best turn-key solution for calibrating all kinds of flow meters and at different sizes. We design highly specialised and customised systems to suit our customer needs and demands. Our systems also follow ISO-4185 standards for calibration

At Nagman, we understand that every customer is unique and has different needs. That’s why we strive to provide the best system that meets your individual requirements without compromising on design or functionality. No matter how difficult the constraints, we’ll work with you to create a solution that works for you!

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Gas meter calibration

Electromagnetic Flow meters

Vortex Flow Meters

Ultrasonic Flow Meters

Positive Displacement Flow Meter

Positive Displacement Flow Meters

Liquid flow calibration system

Mass Flow Meters

Tailor made for customer’s exact requirements

Wide range of meter sizes calibratable from DN-3 till DN-400 (and above)

Highly sophisticated designs to enhance operations and increase customer’s throughput

Available as either Comparison, Volumetric or Gravimetric method of calibration

Follows to ISO-4185 standard

Available with multiple levels of autonomy including Manual, Semi-Automatic or Fully Automatic methods of operation

Meter Sizes From DN-3 till DN-400  (based on customer requirement)
Flow Rates From 1 LPM till 25000 LPM  (based on customer requirement)
Lines 1,2 or 3 (based on customer requirement)
Calibration Campaign Time To suit, from 30s
Calibration Methods Gravimetric – Also known as the GOLD standard employs 1 or more Stainless Steel tanks mounted on precise weighing scales
Volumetric – employs 2 or more pre-calibrated Stainless Steel volumetric tanks
Comparison – employs pre-calibrated Electromagnetic or Coriolis Mass Flow meters as master meters
Calibration Accuracy From 0.5 % up to 0.05 %
Calibration Media Water (Correction factor applicable for other liquids)
No. Of Units under Test As per customer Requirements
Display / Control Console Flow Rate, Total Flow, Start/Stop Timer
Method Of Operation Manual, Semi, Fully Automatic (As per customer requirements)
Automation PLC / SCADA / HMI


Control Panel

Reducers / Expander



Weighing Scales

Storage Tanks and more

CALFLOW Software

Mounting Clamps


A flow meter calibration system is a set of tools and equipment used to test, verify, adjust, and calibrate the accuracy of flow meters, ensuring they provide precise measurements of fluid flow rates.
Flow meter calibration systems can be designed to calibrate various types of flow meters, including Coriolis mass, Electromagnetic, Ultrasonic, Turbine, Vortex, and Positive Displacement meters, among others.
Yes, various national and international standards exist for flow meter calibration, such as ISO 4185. Compliance with these standards is often required for certain industries.
In the Gravimetric method, water (or fluid) is collected in collection tanks that are placed over high precision weighing scales. These scales have a high accuracy and resolution and hence we can accurately measure the total weight/mass of the fluid collected. From this and with the help of an online/offline density meter, we can get the density of the fluid and thus calculate the actual volume of the fluid that is collected with high accuracy.

In the Comparison or Master meter method, the readings between the Reference (test) flow meter and a pre-calibrated meter known as the Master meter, typically Electromagnetic or Coriolis Mass flow meters are compared, and the error deduced by calculating the difference in reading in the test meter from the master meter and calibrate the test meter to match the master meter readings.
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