Accredited Positive Displacement Flowmeter Calibration Services

Where We Specialize in Precision Positive Displacement Flow Meter Calibration

NIST‑traceable calibration for rotary piston, oval gear, nutating disk, and helical gear PD meters

ISO/IEC 17025‑accredited liquid flow calibration for complete measurement integrity

Tailored calibrations aligned to your meter type, viscosity ranges, and application demands

Digital, fully traceable as‑found/as‑left reporting for audit‑ready compliance

ISO/IEC 17025 Accredited

True SI traceability through NIST

Specialized mechanical‑flow metrology expertise

Up to 400 GPM traceable flow standards

4,000+ flow devices calibrated annually

Precision Positive Displacement Flow Capabilities You Can Trust

Transcat delivers precision, reliability, and long‑term performance for your positive displacement (PD) flowmeters through comprehensive, NIST‑traceable calibration services. Our technicians specialize in the mechanical dynamics of PD technologies—including rotary piston, oval gear, nutating disk, and helical gear designs. We ensure accurate performance across fuels, lubricants, viscous chemicals, polymers, water blends, and specialty fluids.

We offer both onsite and in‑lab calibration within our ISO‑accredited facilities, providing consistent, verified measurement accuracy across a broad range of manufacturers, viscosities, and flow conditions.

Trusted Calibration for All Leading Brands

Comprehensive Support for All Major PD Meter Manufacturers

Transcat supports a wide portfolio of positive displacement flowmeter brands, allowing you to consolidate service providers and streamline your calibration program. Supported brands include AW Gear, Max Machinery, Oval, Kobold, and more.

Don’t see your brand of flow meter listed here? Skip the search. Request a quote and we'll take it from there – verifying the brand, type and capability we can offer.

Why Do Positive Displacement Flow Meters Need Calibration?

Positive displacement meters are known for repeatability and their ability to handle high‑viscosity fluids—but they are mechanical devices. Over time, wear, fluid conditions, and system environments can introduce drift or degrade performance.

Common contributing factors include:

Wear of gears, pistons, rotors, or disks affecting volumetric accuracy

Increased friction from contaminants or particulates

Seal degradation resulting in bypass or reduced volume capture

Viscosity changes that alter rotational behavior

Mechanical fatigue or aging internal assemblies

Pressure or temperature shifts introducing measurement offsets

Uncorrected drift can lead to under‑ or over‑reporting usage, batching errors, financial loss in custody transfer, and process‑quality deviations. Routine calibration ensures your PD meter’s mechanical throughput consistently aligns with true flow volume.