Flow Meter Calibration/ Process Flow Calibration Capability:

  • (0 – 400 Gallons/min)
  • Liquid applications including ultra-pure water, alcohol, wastewater and many others
  • Pipe Diameter: 0.5” (13mm) to 240” (6000mm)
  • Process temperature capability -40 °C to 200 °C
  • Consumed Energy Calculation upon request
  • Uncertainty 0.4% to 0.6% depending on total flow rate

We Provide ISO 17025 Accredited Flow Meter Calibration Services for:

  • Ultra-Pure Water in Pharmaceutical and Semiconductor applications
  • Waste Water treatment
  • Potable city and well water
  • Many others…

We’ll Calibrate Your Flow Meter When and Where You Need it!

  • We can calibrate your flow meter in process at your site – minimizing downtime and reducing disruption to daily operations.
  • The Master Meter technique works with most common pipe materials.
  • We provide ISO-17025 accredited NIST flow meter Calibration, not just Verification!

post image

Left: Differential Ultrasonic Transceiver in Use. Right: Fuji PortaFlow C F SC 2

A transit time flow meter uses two ultrasonic transceivers, a fixed distance apart, to inject sound waves into the fluid. Sound waves hitch a ride on the medium they are transmitted in, so the sound travelling in the direction of fluid flow will be faster than the speed of sound in the same fluid with no flow. Similarly, the sound transmitted against the flow will travel at a slower speed compared to its speed in the static fluid.

The master meter measures the time of flight of ultrasonic pulses travelling with the flow and those travelling against it. Simple math shows fluid velocity is proportional to the time taken for the sound to travel between the sensors.

post image


V = Fluid velocity
K = Calibration constant
tus = upstream transit time
tds = downstream transit time
L = Time of Flight distance between sensors
θ = Incident angle of ultrasonic waves

Note the calibration constant K takes various linear properties into account, including variation in the pipe’s internal structure, such as roughening or corrosion that can affect turbidity of the fluid. Check out why it’s important to regularly Calibrate your fluid meter and not just run factory set verification routines.

On-Site Calibration Services

At PCS, we provide specialized on-site flow meter calibration services to customers whose facilities are located in Tennessee, Virginia, Alabama, Georgia or Kentucky. If your company is near one of the following locations, we can perform calibration services on-site:

  • Knoxville, TN
  • Johnson City, TN
  • Nashville, TN
  • Cookeville, TN
  • Bristol, TN
  • Murfreesboro, TN
  • Kingsport, TN
  • Atlanta, GA
  • Chattanooga, TN
  • Abingdon, VA
  • Huntsville, AL
  • Decatur, AL
  • Louisville, KY
  • Lexington, KY

Please contact us today to schedule an appointment!

Accreditation and Documentation

All calibrations are traceable to the SI through NIST, (National Institute of Standard and Technology) and include “long form” calibration certificates with as-found/as-left data. ISO 17025 accredited calibration is available upon request. We also offer a web based calibration interface, “e-certificates” that gives you access to electronic copies of your calibration certificates which can be viewed and printed at your convenience. Standard turnaround time is 48 hours.

The team at PCS is willing to work hard, when it matters most, to ensure our state crime laboratory system continues to meet stringent ISO accreditation requirements.

Chad Johnson

Quality Assurance Manager, Forensic Services Division, Tennessee Bureau of Investigation

We have been using PCS to calibrate our equipment since 2012. Turnaround time has always been around 24 hrs!!

Jamie Neal

Weidmann Diagnostics

Our CAP auditors, who always inspect us thoroughly, were very impressed with the pipette calibrations performed by PCS.

John Ritter

East Tennessee Children’s Hospital

Being partnered with PCS is an absolute pleasure. Turnaround times are always fast and on schedule!

Michael Grones

Shively Brothes-General Motors Powertrain

PCS handles a large portion of our outside calibrations. They always provide a quick turnaround for anything we send them

Ed Carbo

Aisin Automotive Casting

Precision Calibration has provided excellent service for all of our calibration needs and always provide an extremely fast turnaround!

Sara Lambert

Dynamic Aviation

Thanks for the support when issues pop up at our plant. Having calibrated items available at a moments notice prevents a show stopper for customers!

Darrell Dietz

Jost QA Manager

Ready to Send in Your Order?

1615 East Andrew Johnson Hwy Morristown, TN 37814

Office Hours