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Allen Measurement Services provides mobile proving services to the oil and gas industry by verifying liquid measurement meters.

Our technicians are trained in the API guidelines for custody-transfer meter proving. We have technicians stationed throughout West, East, and South Texas with the availability to service all parts of Texas, New Mexico, Louisiana, Arkansas, and Oklahoma.


  • High volume

  • High pressure

  • LACT unit meter proving

  • Load rack meter proving

  • Coriolis, turbine, ultrasonic, positive displacement meter proving

  • We can service all parts of Texas, New Mexico, Louisiana, Arkansas and Oklahoma

  • Troubleshoot measurement problems

  • Measurement witnessing for custody transfer meters


  • Our fleet of truck and trailer-mounted portable bi-directional ball prover units range from 35 to 4000 BBL capacity.

  • Our proving equipment is NIST traceable, and is designed and operated per the guidelines of the American Petroleum Institute (API) for custody transfer meter proving.

  • Each proving unit is equipped with Flow-Cal’s PROVEit® technology, which is configured to API standards to provide accurate and immediate results of meter performance to the meter witness on each job site.

  • Our trucks range from ANSI 150 to 600 pressure ratings.

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