The europascal BH2-300B DP Dual Piston Deadweight Tester is a high-performance hydraulic pressure standard designed for precise pressure calibration over a broad measuring range from 1 to 300 bar. Its dual-piston design combines a low-pressure piston and a high-pressure piston within one calibration system, providing excellent flexibility for professional calibration laboratories, industrial metrology, quality assurance, research and development.
The measuring range extends from 1 to 300 bar, corresponding to 100 to 30,000 kPa or approximately 10 to 4,000 psi. With an accuracy of 0.01 % of reading, optionally available with enhanced accuracy of up to 0.006 % on request, the BH2-300B DP provides a reliable physical pressure reference for demanding calibration applications.
The abbreviation DP stands for Dual Piston. Unlike a single-piston deadweight tester, the BH2-300B DP uses two precision piston-cylinder systems optimized for different parts of the measuring range. The low-pressure piston has a typical piston area of 78.4472 mm², while the high-pressure piston has a typical piston area of 15.6852 mm².
This dual-piston configuration enables the instrument to start at only 1 bar while extending the hydraulic measuring range up to 300 bar.
The low-pressure piston is manufactured from treated steel, while the high-pressure piston is manufactured from tungsten carbide. The cylinders are manufactured from treated steel.
The system uses H40 oil with a density of approximately 860 kg/m³ as the hydraulic pressure medium. Pressure generation is provided by the CH2-1250B generator base.
europascal supports professional users with product selection, configuration, maintenance and calibration. The europascal calibration service provides professional calibration solutions for deadweight testers, piston gauges, pressure gauges, pressure sensors, pressure transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The europascal BH2-300B DP Dual Piston Deadweight Tester combines a wide hydraulic measuring range with high accuracy and the flexibility of two precision piston-cylinder systems.
Key benefits include:
- High-performance hydraulic deadweight tester
- Dual-piston configuration
- Two precision piston-cylinder systems
- Measuring range from 1 to 300 bar
- Measuring range from 100 to 30,000 kPa
- Measuring range from approximately 10 to 4,000 psi
- Maximum pressure of 300 bar / 30 MPa
- Accuracy of 0.01 % of reading
- Enhanced accuracy up to 0.006 % on request
- Low-pressure piston area of 78.4472 mm²
- High-pressure piston area of 15.6852 mm²
- Treated steel low-pressure piston
- Tungsten carbide high-pressure piston
- Treated steel cylinders
- CH2-1250B pressure generator
- H40 oil as pressure medium
- Fluid density approximately 860 kg/m³
- Approx. 22 kg instrument weight without weights
- Stainless steel calibration masses
- Different pressure units available
- Standard or customer-specific local gravity
- Optional motorized weight rotation
- Optional piston position visualization
- Optional automatic pressure calculation
- Optional computer data transfer
- Optional accredited calibration certificate
- Professional calibration and service from europascal
The combination of two piston-cylinder systems provides a particularly broad useful measuring range while maintaining excellent metrological performance.
Dual Piston Design for a Wide Measuring Range
A key feature of the europascal BH2-300B DP is its dual-piston configuration.
The instrument incorporates:
Low-pressure piston (LP): 78.4472 mm²
and:
High-pressure piston (HP): 15.6852 mm²
The larger effective area of the low-pressure piston enables lower pressures to be generated with practical mass loads.
For higher pressures, the smaller high-pressure piston provides the required pressure using manageable calibrated masses.
This principle allows one pressure balance system to cover a significantly broader measuring range than would otherwise be practical with a single piston-cylinder system.
The dual-piston configuration is particularly useful for calibration laboratories that need to calibrate both lower-pressure and higher-pressure instruments while minimizing the number of separate reference standards required.
Pressure Range from 1 to 300 bar
The europascal BH2-300B DP covers a total measuring range from:
1 to 300 bar
This corresponds to:
100 to 30,000 kPa
or approximately:
10 to 4,000 psi
The maximum pressure is therefore:
300 bar / 30 MPa
This provides an overall measuring range ratio of:
1:300
The wide range makes the BH2-300B DP suitable for numerous common industrial pressure ranges, including instruments with nominal ranges such as 10 bar, 25 bar, 40 bar, 60 bar, 100 bar, 160 bar, 250 bar and 300 bar.
Accuracy of 0.01 % of Reading
The europascal BH2-300B DP Dual Piston Deadweight Tester provides a standard accuracy of:
0.01 % of reading
For applications with particularly demanding metrological requirements, an enhanced accuracy of:
up to 0.006 %
is available on request.
The complete measurement uncertainty of an actual calibration depends on additional influence quantities.
These can include:
- Calibration of the mass set
- Effective piston areas
- Local gravitational acceleration
- Air buoyancy
- Piston-cylinder temperature
- Pressure deformation
- Density of the hydraulic fluid
- Hydrostatic head correction
- Repeatability
- Resolution of the device under test
- Environmental conditions
These quantities should be considered when establishing a measurement uncertainty budget for high-accuracy pressure calibration.
Fundamental Piston Gauge Measurement Principle
The europascal BH2-300B DP operates according to the fundamental physical measurement principle of a piston gauge.
Pressure is derived from a defined force acting on a characterized effective piston area.
The fundamental relationship is:
p = F / A
where:
p = generated pressure
F = force acting on the piston
A = effective piston area
The force generated by calibrated masses is primarily determined by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified relationship therefore becomes:
p = (m × g) / A
Because the BH2-300B DP incorporates two different piston areas, the same fundamental equation applies to both piston-cylinder systems.
The appropriate calibrated effective area is used depending on which piston is operating.
For high-accuracy pressure calibration, additional corrections can be applied for temperature, pressure deformation, air buoyancy, gravity and hydrostatic head.
Low-Pressure Piston
The low-pressure piston of the BH2-300B DP has a typical piston area of:
78.4472 mm²
The low-pressure piston is manufactured from:
treated steel
Its comparatively large piston area allows lower hydraulic pressures to be generated using practical mass loads.
This is an important advantage of the dual-piston concept because a single high-pressure piston with a much smaller area would require very small masses to generate equivalent low pressures.
The low-pressure piston therefore extends the useful measuring range of the system toward lower pressure values.
High-Pressure Piston
The high-pressure piston has a typical piston area of:
15.6852 mm²
The high-pressure piston is manufactured from:
tungsten carbide
Tungsten carbide provides excellent hardness, wear resistance and dimensional stability and is therefore particularly suitable for precision piston components.
The smaller effective area enables the BH2-300B DP to generate pressures up to:
300 bar / 30 MPa
without requiring an impractically large mass stack.
The combination of the low-pressure and high-pressure pistons is the central advantage of the DP configuration.
Hydraulic Operation with H40 Oil
The europascal BH2-300B DP is a hydraulic deadweight tester.
The specified standard pressure medium for this model is:
H40 oil
with a fluid density of approximately:
860 kg/m³
This is an important model-specific difference compared with several lower-pressure BH2 instruments that use H15 oil.
The hydraulic fluid transfers pressure from the generator to the selected piston-cylinder assembly and the connected device under test.
For high-accuracy measurements, the density of the pressure medium should be considered when a vertical height difference exists between the reference level of the deadweight tester and the reference level of the device under test.
CH2-1250B Pressure Generator
The europascal BH2-300B DP uses the:
CH2-1250B generator base
The hydraulic pressure generator enables the operator to generate and finely regulate the required pressure.
The capstan displaces hydraulic fluid through the system until the pressure generated by the hydraulic circuit balances the force applied to the selected piston-cylinder assembly.
Fine pressure control allows the piston to be positioned correctly for accurate measurements.
The CH2-1250B generator, dual piston-cylinder system and calibrated weight set together form the complete physical pressure reference.
Stainless Steel Weight Sets
The calibrated masses form another essential part of the BH2-300B DP measurement system.
The BH2 series uses:
stainless steel weights
The masses have an ergonomic shape designed to facilitate loading onto the weight carrier.
The main weight set can be supplied according to the required engineering unit.
Available units include:
bar
kPa
psi
and other available pressure units.
Intermediate weight sets and additional principal weight sets can also be selected depending on the calibration application.
Standard Gravity and Local Gravity
The pressure generated by a deadweight tester depends directly on gravitational acceleration.
The conventional standard gravitational acceleration is:
g = 9.80665 m/s²
However, the actual value varies according to geographical location.
The BH2-300B DP can therefore be configured for either standard gravity or a customer-specified local gravity value.
For high-accuracy calibration, this is an important consideration because a deviation in gravitational acceleration directly changes the force produced by the calibrated masses.
Technical Highlights
Model: europascal BH2-300B DP
Device type: Dual Piston Hydraulic Deadweight Tester
Product family: BH2 High Performance
Configuration: Dual piston
Number of pistons: 2
Measuring range: 1 to 300 bar
Measuring range: 100 to 30,000 kPa
Measuring range: Approx. 10 to 4,000 psi
Maximum pressure: 300 bar / 30 MPa
Accuracy: 0.01 % of reading
Enhanced accuracy: Up to 0.006 % on request
Measurement principle: Piston gauge
Pressure medium: H40 oil
Fluid density: Approx. 860 kg/m³
Generator base: CH2-1250B
Low-pressure piston area: 78.4472 mm²
High-pressure piston area: 15.6852 mm²
Low-pressure piston material: Treated steel
High-pressure piston material: Tungsten carbide
Cylinder material: Treated steel
Number of pistons: 2
Device weight without weights: Approx. 22 kg
Standard gravity: 9.80665 m/s²
Operating temperature: 18 to 28 °C
Technical Data
| Feature | europascal BH2-300B DP |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH2-300B DP |
| Device type | Hydraulic Deadweight Tester |
| Product family | BH2 High Performance |
| Configuration | Dual piston |
| Number of pistons | 2 |
| Measuring range | 1–300 bar |
| Measuring range | 100–30,000 kPa |
| Measuring range | Approx. 10–4,000 psi |
| Maximum pressure | 300 bar / 30 MPa |
| Accuracy | 0.01 % of reading |
| Enhanced accuracy | Up to 0.006 % on request |
| Measurement principle | Piston gauge |
| Pressure medium | H40 oil |
| Fluid density | Approx. 860 kg/m³ |
| Generator base | CH2-1250B |
| LP piston area | 78.4472 mm² |
| HP piston area | 15.6852 mm² |
| LP piston material | Treated steel |
| HP piston material | Tungsten carbide |
| Cylinder material | Treated steel |
| Device weight without masses | Approx. 22 kg |
| Operating temperature | 18–28 °C |
| Standard gravity | 9.80665 m/s² |
| Local gravity | Customer-specific value available |
| Motorization | Optional |
| Piston position visualization | Optional |
| Automatic pressure calculation | Optional |
| Data transfer | Optional |
Optional Motorization and Piston Position Visualization
The europascal BH2-300B DP can be equipped with option OP0004.
This option provides motorized rotation of the masses together with visualization of the piston position using indicator lights.
Correct rotation and piston position are important for stable piston gauge operation.
Motorization reduces manual intervention during repetitive calibration procedures, while piston position indicators assist the operator in establishing the appropriate measurement condition.
With option OP0004 installed, the instrument weight without the mass set increases from approximately 22 kg to 24 kg.
Optional Automatic Pressure Calculation
For laboratories requiring more advanced automation, the BH2-300B DP can be equipped with option OP0301.
The calculator module provides:
- Motorized mass rotation
- Dynamic visualization of piston position
- Automatic display of generated pressure
- Consideration of temperature
- Consideration of atmospheric pressure
- Consideration of humidity
- Computer data transfer
- Improved traceability
- Support for calibration certificate generation
This combines the fundamental physical pressure generation of a dual-piston deadweight tester with modern digital calibration functions.
The result is improved operator convenience and reduced manual calculation during routine calibration.
BH2-300B DP Compared with BH2-300B SP
The BH2-300B is available in single-piston and dual-piston configurations.
The abbreviation:
SP = Single Piston
while:
DP = Dual Piston
Both concepts can cover pressure ranges up to 300 bar, but the dual-piston system provides two optimized piston-cylinder assemblies.
The BH2-300B DP is therefore particularly attractive when excellent usability over a broad pressure range is required.
The larger low-pressure piston supports precise operation toward the lower end of the range, while the smaller high-pressure piston is optimized for higher pressures.
This combination provides greater flexibility than a conventional single-piston configuration.
BH2 Dual Piston Series
The europascal Aremeca BH2 High Performance family includes several dual-piston models.
These include:
BH2-300B DP: 1 to 300 bar
BH2-400B DP: 1 to 400 bar
BH2-600B DP: 1 to 600 bar
BH2-700B DP: 1 to 700 bar
BH2-1200B DP: 1 to 1,200 bar
This product family allows laboratories to select a dual-piston pressure standard according to the maximum hydraulic pressure required.
The BH2-300B DP is the lowest maximum-pressure model in this dual-piston group and is therefore particularly suitable when broad low-to-medium hydraulic pressure coverage is required without extending into very high pressure ranges.
Further europascal Aremeca products can be found here.
Calibration Certificate and Service
The europascal BH2-300B DP is supplied with a factory calibration certificate traceable to national standards.
An optional COFRAC or DKD/DAkkS calibration certificate is available.
Regular calibration of the piston-cylinder assemblies and mass set is important for maintaining the traceability and metrological performance of the pressure standard.
The europascal calibration service provides professional calibration solutions for deadweight testers, piston gauges, pressure gauges, pressure sensors, pressure transmitters and other pressure measuring equipment.
europascal also provides support for system configuration, maintenance, service and the selection of appropriate pressure calibration equipment.
Why Choose the europascal BH2-300B DP?
The europascal BH2-300B DP Precise Dual Piston Deadweight Tester combines a broad hydraulic measuring range from 1 to 300 bar with an accuracy of 0.01 % of reading.
For particularly demanding applications, enhanced accuracy up to 0.006 % is available on request.
Its dual-piston configuration is a major advantage. A low-pressure piston with a typical area of 78.4472 mm² and a high-pressure piston with a typical area of 15.6852 mm² provide optimized operation across the wide pressure range.
The treated steel low-pressure piston, tungsten carbide high-pressure piston, treated steel cylinders, H40 hydraulic oil and CH2-1250B generator base provide a robust foundation for professional pressure calibration.
Optional motorization, piston position visualization and automatic pressure calculation enable the BH2-300B DP to be adapted to advanced calibration workflows.
Combined with professional advice, calibration and service from europascal, the BH2-300B DP provides an excellent physical pressure reference for professional calibration laboratories and industrial metrology.
Typical Calibration Applications with the europascal BH2-300B DP
The europascal BH2-300B DP is particularly suitable for calibrating precision pressure gauges, digital pressure gauges, reference pressure instruments, pressure sensors, pressure transmitters, pressure transducers, pressure switches and hydraulic process instruments.
Typical application areas include professional calibration laboratories, pressure instrument manufacturers, industrial quality assurance, mechanical engineering, plant engineering, research and development and other applications requiring reliable hydraulic reference pressures across a particularly broad range.
Looking for the europascal BH2-300B DP or a precise dual-piston hydraulic pressure calibration solution? Contact europascal for expert advice, product configuration and professional calibration services tailored to your requirements.
