This version of the LDW-HK Deadweight Tester has 0.05% Uncertainty of Measured Value and Ranges are in bar.

Proven primary pressure standard
Deadweight Tester / Pressure Balances are the most accurate instrument 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 of 5 years (recommended in accordance with German Calibration Service DKD/DAkkS).
The deadweight tester / pressure balance has therefore been used for years in factory and calibration laboratories in national institutes, research laboratories and in industry.

Stand-alone operation
Due to its integrated pressure generation and the pure mechanical measuring principle, the model LR-Cal LDW-HK is ideal for on-site use for maintenance and service.

Basic principle
Pressure is defined as the quotient of force and area. The core component of the model LR-Cal LDW-HK is therefore a very pecisely manufatured piston-cylinder-system, which is loaded with masses in order to generate the individual test points.
The masses applied are proportional to the target pressure and this is achieved through optimally graduated weights. As standard, these masses are manufactured to the standard gravity (9.80665 m/s²), though the can be manufactured to a specific location (gravity) and also UKAS (DAkkS)-calibrated.

Easy operation
The integrated dual-area spindle pump enables rapid filling of the test system and smooth pressure generation up to 1,200 bar. At the same time, the precise adjustable spindle pump also serves for fine pressure adjustment. A control schematic for pressure generation on the instrument base facilitates quick and easy operation.

As soon as the measuring system reaches equilibrium, there is a balance of forces between the pressure and the mass load applied. The excellent quality of the system ensures that this pressure remains stable over several minutes, so that the pressure value for comparative measurements can be read without any problems, or also so that more complex adjustments can be carried out on the item under test.

Compact instrument design
The LR-Cal LDW-HK is also particularly notable for its compact dimensions, which are not altered during operation, since the spindle runs within the pump body.
With its compact dimensions, the exceptionally robust ABS plastic housing and the low weight associated with these, the LR-Cal LDW-HK is also particularly suited to on-site applications.


This item comes with a one year warranty from the manufacturer. Please allow 3-4 weeks lead time for this new product to arrive. 

LR-Cal LDW-HK Hydraulic Deadweight Tester Pressure Calibrator Balance 0.05% Acc

    1. The weights included in the standard scope of delivery are ideally suited for everyday use. If you would like to generate intermediate values, however, we recommend using a set of trim-masses. Set of trim-masses, class F1
      (1 x 50 g, 2 x 20 g, 1 x 10 g, 1 x 5 g, 2 x 2 g, 1 x 1 g,
      1 x 500 mg, 2 x 200 mg, 1 x 100 mg, 1 x 50 mg,
      2 x 20 mg, 1 x 10 mg, 1 x 5 mg, 2 x 2 mg, 1 x 1 mg

    2. Set of trim-masses, class M1
      (1 x 50 g, 2 x 20 g, 1 x 10 g, 1 x 5 g, 2 x 2 g, 1 x 1 g,
      1 x 500 mg, 2 x 200 mg, 1 x 100 mg, 1 x 50 mg,
      2 x 20 mg, 1 x 10 mg, 1 x 5 mg, 2 x 2 mg, 1 x 1 mg

    3. As a standard, the deadweight tester / pressure balance is equipped with a quick connector for connecting the test item. For this purpose, various threaded adapters, which can be easily exchanged, are available. Additionally the sets of adapters include spare O-rings as well as a spanner, 32 flats and 14 flats, for exchanging the adapters.

      Set of adapters: 1/4" BSP, 3/8" BSP, 1/2" NPT, M20 x 1.5

    4. Set of NPT adapters: 1/8" NPT, 1/4" NPT, 3/8" NPT, 1/2" NPT

    5. Angle connection 90°, for test specimens with back mounting connection

    6. Separator (without diaphragm), max. 1,000 bar

    7. Separator (to separate 2 liquid media by diaphragm), max. 700 bar

    8. Separator (to separate 2 liquid media by diaphragm), max. 1,200 bar

    9. Motorised piston drive unit for 700 bar, 1,200 bar and 1,400 bar measuring ranges (115...230 VAC, 50/60 Hz)

    10. Special test-item adapter with quick connect, for the matching to the quick-release system, operation as a comparison test pump possible

    11. Adapter for mounting piston-cylinder system into a quck-release mechanism

    12. Special operating fluid: hydraulic fluid based on mineral oil

    13. O-ring set consisting of 5 pcs. 8 x 2 and 5 pcs. 4 x 2.2 (for piston connector and test item connector)

For Sales, Calibration, or Repair Services Call 1 (888) 868 - 4546

Contact Us 

750 Oakdale Rd Unit 52

Toronto, Ontario

M3N 2Z4 Canada

Local: (905) 406-0100 

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