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LTH Type Trolley Prover

Product description

LTH type trolley prover is a small movable flow standard device which uses the gas rotary flowmeter as the master meters. It could be used to do indoor or field calibration for the Roots flowmeter, industrial diaphragm flowmeter as well as turbine flowmeter, etc. This product adopts the dual timing technology and PID technology with stable flow, showing features like: a high level automation, quick efficiency, easy operation etc. It is suitable for delivery and periodic calibrations of the displacement and velocity-type flowmeters.



  • Two Roots meters as the master meters

  • Temperature and pressure transducers

  • Hose and quick coupler

  • Blower

  • Controller that regulates blower flow and collects filed data

  • Computer system that could calculate and display testing data

  • Buffer tank

  • Junction box and accessory box


  • It could be used for both indoor and field calibrations

  • Instruments that could be calibrated include: Roots flowmeter, turbine flowmeter, industrial diaphragm meter. When calibrating the velocity-type flowmeter, a flow straightener and a buffer tank shall be mounted


Performance index

  • Flow range: 0.5 m³/h ~ 400 m³ /h 。

  • System uncertainty: better than 0.5%

  • System repeatability: 0.1 %

  • Ambient temperature: 0℃ ~+40℃

  • Humidity ≤ 95 %

  • Working power: 220V d.c

  • Testing medium: Air

  • Dimension of the prover: 1100x550x600mm