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  • Primary standard for pressure ranges up to 16,000 psi (1000 bar) hydraulic
  • Reference instrument for the test, adjustment and calibration of pressure measuring instruments in factories and calibration laboratories
  • Self-contained, complete system suitable for on-site measurements and calibrations
  • Uncertainty: to 0.025 % of reading
  • High long-term stability with a recommended recalibration cycle of 5 years
  • Masses manufactured from stainless steel and aluminum
  • Local gravity adjustment possible at no additional charge
  • Compact dimensions

The DH-Budenberg CPB3800 deadweight tester features an accuracy of 0.025% and compact size making it ideally suited to on-site, field calibration as well as service and maintenance of pressure transmitters and mechanical gauges. With integrated (hydraulic) pressure generation and a purely mechanical measuring principle, there is no electrical power required for operation.

The pressure is set via an integrated, finely adjustable, precision spindle pump. As soon as the measuring system reaches equilibrium, there is a balance of forces between pressure and the force generated by the mass applied over the area of the piston. The quality of the piston / cylinder system ensures that this pressure remains stable over several minutes so that the device under test can be calibrated or adjusted.

In addition, the DH-Budenberg CPB3800 sets itself apart through its clearly arranged control elements. The built-in spindle pump is very easy to operate even at very high pressures, and features a threaded spindle which moves within the pump body. The spindle pump handle does not move in or out of the body of the pump as the handle is turned, therefore there are no cantilever forces or changes in the overall size of the base as the pressure is changed.

Deadweight testers are the most accurate instruments for the calibration of electronic or mechanical pressure instruments. The CPB3800 uses precisely machined, high-quality materials, resulting in high accuracy and an excellent long-term stability of five years.

DH-Budenberg Class F1 Trim Masses
Class F1 incremental weights for high-precision calibrations
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DH-Budenberg Class M1 Trim Masses
Class M1 incremental weights for general laboratory, industrial, commercial, technical and educational use
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DH-Budenberg Adapter Sets
Test connection adapters for DH-Budenberg CPB3800 deadweight tester and CPP1200-X comparison pump
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DH-Budenberg 90° Angle Connection
90° angle connection for test items with back mounting connection
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DH-Budenberg CPB3800 Separators
Liquid-to-liquid separator protects the CPB3800 deadweight tester from contamination
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DH-Budenberg Deadweight Tester Oil
Operating fluid for CPB series deadweight testers
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DH-Budenberg Weight Carry Cases
2 carry cases for CPB3800 weight set
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DH-Budenberg Carry Case
Carry case for CPB3800 and CPP1200-X instrument base
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Mensor CPU6000 Pressure Calibrator
Choose from the CPU6000-W weather station, CPU6000-S pressure balance sensor box and CPU6000-M digital multimeter


This product can be used in the following applications:

Application Notes

Here's how some of our customers used this product.

Re-calibrating Pressure Gauges up to 15,000 psi

The Background: A customer in the Oil and Gas field has a large number of hydraulic, analog and digital gauges that need efficient and accurate calibration in the field.

The Problem: Though the sheer number of gauges and tough field conditions present a large challenge, the most pressing problem is the extremely high pressure ranges—up to 15,000 psi—of some of the gauges which is well beyond the capabilities of some pressure calibrators.

The Solution: Using the CBP3800 the customer can recalibrate all their gauges whether digital, analog or hydraulic; up to a full range of 16,000 PSI with an accuracy of 0.025% of reading. Another advantage of the CPB3800 is that the unit is fully self-contained and has a high long-term stability without the need to be recalibrated annually as it has no electronics that can drift.