Fluke Pressurements Deadweight Testers
P3200 Water Deadweight Tester

– Pressure ranges to 10,000 psi (700 bar)
– 0.015% of reading accuracy standard (0.008% optional)
– Single or dual piston formats
– Built-in hand pumps standard
– Mounted spirit level with adjustable feet
– Units can be trimmed to local gravity FOC


The P3200 Models are available in single or dual piston formats for increased operating ranges. Units can be supplied in psi, bar, kgf/cm², and MPa. These robust instruments are highly accurate, quick and easy to use. Units feature a built-in priming pump for large volume applications, piston flotation indicators and a high quality screw press for fine pressure control.

Optional PressCal software is available for pressure calculations and certificate generation.

The P3200 Series is the culmination of over 50 years of experience in the production and design of high performance pressure standards. With features designed to improve accuracy and performance, increase reliability and simplify operation these deadweight testers can be used to calibrate virtually any pressure sensing device, including transducers, transmitters, gauges or pressure switches.
Each instrument is supplied with a detachable lid which makes it neat, compact and easily portable. The weight masses are stored in a high-quality case with a self locking mechanism to protect them during transit.
All units are provided with a traceable certificate of accuracy, weight mass details, 1/8 inch, 1/4 inch, 3/8 inch and 1/2 inch NPT or BSP female adaptors, operating fluid (where applicable) and spare seals.
The piston/cylinder assemblies are manufactured to the very highest standards with certified accuracies traceable to international standards laboratories such as the National Institute of Standards and Technology (NIST).

Operating principle
Deadweight testers are the high performance pressure standard for pressure measurement. Utilizing the well proven piston-gauge system consisting of a vertically mounted, precision lapped piston and cylinder assembly, accurately calibrated weight masses (Force) are loaded on the piston (Area), which rises freely within its cylinder. These weights balance the upward force created by the pressure within the system. The pressure is measured when placed on a correctly spinning and floating piston. The total pressure measured is the summation of the weights plus the piston weight carrier assembly.

Instrument base
There are three basic variations in the hydraulic offering; single low pressure, single high pressure and dual piston models. Pressure is generated and controlled by means of a high quality screw press located on the front of the tester. A built-in hand pump is included as standard for all hydraulic models to prime the system and accommodate large volume requirements.

Piston/cylinder assemblies
The piston/cylinder assembly is the heart of each deadweight tester. They are manufactured from materials that provide stability, durability, and low thermal coefficients and distortion. Our experience and knowledge of piston/cylinder production and calibration ensure the precision and performance required for today’s demanding calibration requirements.

Weight masses
Standard weight masses are series 3 nonmagnetic austenitic stainless steel. Each mass is marked with the serial number of the instrument and the nominal pressure value relative to the high or low-pressure piston, when applicable. Optional fractional weights are stainless steel and/or solution heat treated aluminum.

Gravity correction
Gravity varies significantly with geographical location and this variation has a direct effect on the force of the weights and the accuracy of the deadweight tester. Each instrument can be calibrated to local gravity at no extra cost. If unspecified, instruments will be calibrated to Standard Gravity at 980.665 cm/s2.





Pressure Ranges
Distilled water operatedRanges to 10,000 psi (700 bar)


Accuracy±0.015% of reading (±0.008% optional)

*Accuracy based on % of reading from 10% to 100% of the piston range when used in accordance with the corrections found on the calibration certificate. Below 10% ± (accuracy class) x 10% of the piston range.


Materials of Construction
Standard weight materialSeries 3 non-magnetic austenitic stainless steel
Weight density7.8 g/cm³
Optional fractional weightsSolution heat treated aluminum
Weight density2.7 g/cm³
Piston materialTungsten carbide with nickel binder
Density- 15.0 g/cm³
Cylinder materialHardened martensitic steel
Tungsten carbide (water above 500 psi, 35 bar)
Thermal coefficients of expansionOil piston/cylinder 16.5 ppm/°C
Water (above 500 psi, 35 bar) 11 ppm/°C


Test port adaptors1/8, 1/4, 3/8 and 1/2
Instrument weight36 lbs (16 kg)
Instrument size(W x D x H) 17.5 in x 12 in x 8.5 in (440 mm x 300 mm x 215 mm)
Mass set weight (typical)80 lbs (36 kg)
Reservoir volume150 cc
Screw press displacement5.5 cc
Pump displacement4.7 cc per stroke
O-ring seal materialsBuna N as standard, Viton and EPDM available


Weight Increments
Minimum Standard Weight IncrementsUp to 500 psi (35 bar): 1 psi (0.1 bar)
500 to 5000 psi (35 to 350 bar): 10 psi (1 bar)
5000 to 20,000 psi (350 to 1400 bar): 20 psi (2 bar)
Model P3112: 1 psi (0.1 bar)
Optional Fractional WeightsUp to 500 psi (35 bar): 0.1 psi (0.01 bar)
500 to 5000 psi (35 to 350 bar): 1 psi (0.1 bar)
5000 to 20,000 psi (350 to 1400 bar): 2 psi (0.2 bar)


Operating Fluids
Operating FluidsDistilled or deionized water


PressCal SoftwareWindows-based software program that allows users to easily apply all necessary corrections to enhance the deadweight tester performance. Calibration details are then stored and/or used to automatically create a calibration certificate. PressCal is provided as standard with all 0.008% instruments
FluidsInstruments can be supplied for use with Skydrol or brake fluids. Due to the aggressive nature of these fluids the standard nitrile seals and the acrylic reservoir tube will be replaced by either Viton or EPDM seals (as applicable) and an aluminum reservoir tube. For these or any other specialty fluid applications, please consult the factory.