Captive Displacement Meter Prover


The Future of Captive Displacement Prover Technology

Meter Engineers’ new, patented MagnaProve® is the most dependable, user-friendly, and economical small volume piston prover on the market. Accuracy is not a want or a need. It’s an expectation. For the petroleum industry, a small metering error can create an enormous dent in profits. With the new MagnaProve, accuracy and dependability contribute to a healthy bottom line. This meter prover is designed for precision and durability while remaining flexible and versatile for a wide range of metering sites and applications.

Features at a Glance

Exclusive Unique Drive System with A High-Strength Electromagnet

Why the magnet? It was the lure of building a better product. The world needed a prover with superior flow rate turndown, faster cycle times, and improved system durability. From these aspirations, we developed the MagnaProve, the only meter prover to utilize the power of the magnet. This proprietary electromagnet design with a linear actuator gathers its performance by releasing the piston from the magnet, which removes drag from proving runs. This drastically boosts efficiency and proving cycle times. In fact, the linear actuator provides prover readings in as little as 5-second intervals, depending on the flow rate. Equally important, the magnetic field does not transfer through the stainless-steel internal parts. This ensures no extra debris is picked up that would affect the accuracy of proving readings. Additionally, the stainless-steel casing prevents electromagnetic field interference to the system, allowing the magnet and piston to perform their duties unencumbered. All things considered, who wouldn’t be attracted to a prover that delivers this level of system certainty?


  • Exclusive linear actuator with an electromagnet
  • Efficiency contributes to a healthy bottom line
  • Improved system durability means less downtime
  • Drag is significantly reduced for faster cycle times
  • World-class factory support
  • Options include: trailers, arms, portability, seal check, leak detection, and much more
  • All models are capable of portable and stationary options.

Which Model Do I Need?

MP1050 Model Image
Model Specifications
  • Description
    Class 150*
    Class 300*
    Class 600*
    Class 900*
    Height A 89cm / 35in 79cm / 31in 79cm / 31in 79cm / 31in
    Width B 124cm / 49in 124cm / 49in 124cm / 49in 124cm / 49in
    Length C 495cm / 195in 495cm / 195in 495cm / 195in 495cm / 195in
    Width Center of Gravity D 43cm / 17in 43cm / 17in 43cm / 17in 43cm / 17in
    Length Center of Gravity E 251cm / 99in 257cm / 101in 257cm / 101in 259cm / 102in
    Height Center of Gravity F 53cm / 21in 53cm / 21in 53cm / 21in 53cm / 21in
    Inlet & Outlet Height G 43cm / 17in 43cm / 17in 43cm / 17in 43cm / 17in
    Inlet & Outlet Adjustable Angle a Adjustable to client specs. Adjustable to client specs. Adjustable to client specs. Adjustable to client specs.

    *ANSI B16.5 Flange Rating

    1. Dimensions “A”, “B”, “C” are for overall dimensions (+/- 1″).

    2. Dimensions “D”, “E”, “F” are for overall dimensions (+/- 6″).

    3. All dimensions are subject to change without notice.

Service Clearance Dimensions

    Inlet/Outlet Front Side
    36in / 91cm
    Guide Rod
    144in / 366cm
    Barrel Back Side
    24in / 61cm
    Cabinet End
    96in / 244cm
    Electrical Box
    36in / 91cm

    ANSI B16.5
    Flange Rating
    Weight (+/- 5%)
    Weight w/ Water (+/- 5%)
    Class 150 1250lbs / 570kg 1400lbs / 635kg
    Class 300 1650lbs / 750kg 1800lbs / 816kg
    Class 600 2100lbs / 955kg 2250lbs / 1020kg
    Class 900 2600lbs / 1180kg 2750lbs / 1250kg
Max Working Pressure

    ANSI B16.5 Flange Rating
    Max Working Pressure (PSI)
    Class 150 285
    Class 300 740
    Class 600 1480
    Class 900 2220

    1. Max working pressure is rated for a temperature range of -20°F(-30°C) to 250°F(120°C).

    2. All pressure-containing welds have been NDT tested per ASME/ANSI 31.3.

Flow Range

    Max Flow Rate
    735 GPM / 1,050 BPH / 167 M³H
    Displaced Volume
    5Gal / 19L
    I/O Size
Electrical Connections

    120VAC single phase
    120VAC / 240VAC single phase
    240VAC single phase
    480VAC single phase
Compare Models
Model NumberSize (O.D.)Displaced Volume (GAL)Max Flow Rate (BPH)CORIOLIS & ULTRASONIC RECOMMENDED MAX FLOW RATE (BPH)I/O Size


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Product Support

From our floor to in-the-field, Meter Engineers products are manufactured and supported with rigorous detail. We proudly stand behind our products as a world-class support team; ready to assist customers when and how they need it. We are here for you.

Sales Inquiries

Do you need a metering solution for a specific application or flow rate on a job site? Or perhaps, you are looking for a custom prover product that delivers accuracy and dependability, but needs to adhere to some unique requirements? Contact our sales team, today!

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