Dead Weight Tester

A dead weight tester (DWT) is a calibration standard method that uses a piston cylinder on which a load is placed to make an equilibrium with an applied pressure underneath the piston.

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Detailed Description for Dead Weight Tester



·         The piston rod and cylinder uses tungsten carbide material with high strength, high hardness and low coefficient of thermal expansion; increasing the wear resistance of piston, reducing linear expansion and deformation coefficient of the piston rod and cylinder. 

·         Pistons’ working position is numeric displaying; eye-catching and more accurate 


·         Consistent with nominal range and measuring range 


Applications of the dead weight tester

  • Primary standard for calibrating the pressure scale in a hydraulic range up to 1,400 bar (20,000 psi)
  • Reference instrument for factory and calibration laboratories for the testing, adjustment and calibration of pressure measuring instruments
  • Complete, stand-alone system, also suitable for on-site use

Special Features of the dead weight tester

  • Total measurement uncertainty to 0.006 % of reading
  • Extremely flexible instrument with a wide range of single and dual-range piston-cylinder systems
  • Dual-range piston-cylinder systems with fully automated changing between ranges
  • Factory calibration includes traceability to national standards, as standard, with UKAS calibration possible as an option
  • Fast and safe replacement of the piston-cylinder system via patented ConTect quick-release system as an option

Description of the dead weight tester

Proven primary standard
Dead-weight testers are the most accurate instruments available on the market for the calibration of electronic or mechanical pressure measuring instruments. The direct measurement of the pressure (p = F/A), as well as the use of high-quality materials enable a very small measurement uncertainty, in conjunction with an excellent long-term stability.
It has therefore been used for years in factory and calibration laboratories in industry, national institutes and research laboratories.

Stand-alone operation
Due to its integrated pressure generation and the pure mechanical measuring principle, the model CPB5800 dead-weight tester is ideal for on-site use for maintenance and service.


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