The europascal BH2-30B Hydraulic Deadweight Tester is a high-performance single-piston pressure standard designed for precise hydraulic pressure calibration from 0.1 to 30 bar. With an accuracy of 0.01 % of reading, optionally available with an accuracy of up to 0.006 % on request, the BH2-30B provides an excellent physical pressure reference for professional calibration laboratories, industrial metrology, quality assurance, research and development.
The measuring range corresponds to 10 to 3,000 kPa or 2 to 400 psi. A particularly important advantage of the BH2-30B is its very low starting pressure of only 0.1 bar combined with a maximum pressure of 30 bar. This results in a measuring range ratio of 1:300 using only one piston-cylinder system.
The BH2-30B operates according to the proven physical principle of a piston gauge. Calibrated masses generate a defined force on a precisely characterized piston-cylinder assembly. This force is balanced by the hydraulic pressure generated in the system, providing a stable and accurately defined reference pressure for comparison with the device under test.
The system uses H15 oil as the pressure medium and incorporates a precision piston-cylinder assembly manufactured from treated steel. The typical piston area is 78.4825 mm², and the pressure generator is based on the CH2-125B 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, transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The europascal BH2-30B Hydraulic Deadweight Tester combines a particularly low starting pressure with high accuracy and a robust single-piston design.
Key benefits include:
- High-performance hydraulic deadweight tester
- Single piston-cylinder system
- Measuring range from 0.1 to 30 bar
- Measuring range from 10 to 3,000 kPa
- Measuring range from 2 to 400 psi
- Maximum pressure of 30 bar / 3 MPa
- Measuring range ratio of 1:300
- Accuracy of 0.01 % of reading
- Accuracy up to 0.006 % available on request
- Typical piston area of 78.4825 mm²
- Treated steel piston
- Treated steel cylinder
- CH2-125B generator base
- H15 oil as pressure medium
- Oil density approximately 845 kg/m³
- Approx. 22 kg device weight without weights
- Non-magnetic stainless steel masses
- Different pressure units available
- Standard or local gravity configuration
- Optional motorization and piston position visualization
- Optional automatic pressure calculation
- Optional data transfer
- Optional accredited calibration certificate
- Professional calibration and service from europascal
The BH2-30B is especially suitable for laboratories requiring a physical reference standard for relatively low hydraulic pressures.
Ideal for Demanding Calibration Applications
The europascal BH2-30B is designed to test, adjust and calibrate mechanical and electronic pressure measuring instruments by comparison.
Typical devices under test include:
- Precision pressure gauges
- Digital pressure gauges
- Reference pressure indicators
- Pressure sensors
- Pressure transmitters
- Pressure transducers
- Pressure switches
- Hydraulic pressure gauges
- Process pressure instruments
- Secondary pressure standards
The low starting pressure of 0.1 bar is particularly advantageous for instruments with relatively small hydraulic measuring ranges.
Typical DUT ranges can include:
- 0 to 1 bar
- 0 to 2.5 bar
- 0 to 6 bar
- 0 to 10 bar
- 0 to 16 bar
- 0 to 25 bar
- 0 to 30 bar
This makes the BH2-30B an interesting solution for laboratories that require a hydraulic reference standard at pressures where many conventional hydraulic deadweight testers begin at significantly higher values.
Pressure Range from 0.1 to 30 bar
The europascal BH2-30B covers a measuring range from:
0.1 to 30 bar
This corresponds to:
10 to 3,000 kPa
or:
2 to 400 psi
The maximum pressure is:
30 bar / 3 MPa
The combination of a 0.1 bar minimum pressure and a 30 bar maximum pressure provides an impressive measuring range ratio of:
1:300
This complete pressure range is covered with a single piston-cylinder system.
No change between two different pistons is required within the specified measuring range.
Accuracy of 0.01 % of Reading
The europascal BH2-30B Hydraulic Deadweight Tester provides a standard accuracy of:
0.01 % of reading
For particularly demanding applications, an enhanced accuracy of:
up to 0.006 %
is available on request.
This performance makes the BH2-30B suitable not only for industrial pressure testing but also for demanding calibration laboratory applications.
The complete measurement uncertainty of an actual calibration depends on additional influence quantities such as:
- Calibration of the piston-cylinder system
- Calibration of the mass set
- Effective piston area
- Local gravitational acceleration
- Temperature
- Density of the pressure medium
- Air buoyancy
- Environmental conditions
- Hydrostatic head correction
- Repeatability
- Resolution of the device under test
These quantities should be considered when establishing the measurement uncertainty budget for high-quality pressure calibration.
Fundamental Piston Gauge Measurement Principle
The europascal BH2-30B operates according to the fundamental physical principle of a piston gauge.
The basic relationship is:
p = F / A
where:
p = generated pressure
F = force acting on the piston
A = effective piston area
The gravitational force generated by the calibrated masses is primarily described by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified pressure equation therefore becomes:
p = (m × g) / A
The pressure is generated hydraulically and balanced against the force acting on the piston-cylinder assembly.
When equilibrium is reached and the piston is operating in the correct position, the resulting pressure provides a highly stable physical reference for comparison with the connected device under test.
Precision Single-Piston Design
The europascal BH2-30B uses one piston-cylinder system across the complete measuring range from 0.1 to 30 bar.
The typical piston area is:
78.4825 mm²
The piston is manufactured from:
treated steel
and the cylinder is also manufactured from:
treated steel
The precision piston-cylinder assembly represents the metrological heart of the deadweight tester.
Using a single piston across the complete range simplifies operation because the user does not have to switch between different piston-cylinder assemblies during calibration.
The manufacturer specifies a repeatability of 3 × 10⁻⁵ and a sensitivity of 1 × 10⁻⁵ for this high-performance deadweight tester concept.
Hydraulic Operation with H15 Oil
The europascal BH2-30B is a hydraulic deadweight tester.
The specified pressure medium is:
H15 oil
with a fluid density of approximately:
845 kg/m³
The hydraulic operating principle provides stable pressure generation and is particularly suitable for pressure instruments compatible with oil.
The capstan generates pressure by displacing the hydraulic fluid. This pressure acts on the piston-cylinder assembly and is balanced by the applied calibrated masses.
The BH2-30B therefore combines mechanical pressure generation with a fundamental physical reference principle.
CH2-125B Generator Base
The BH2-30B uses the:
CH2-125B generator base
The generator provides the hydraulic pressure required to bring the piston and applied masses into the appropriate operating position.
The capstan allows the operator to increase or decrease the hydraulic pressure precisely.
This provides fine control when approaching the equilibrium condition required for an accurate pressure measurement.
Stainless Steel Weight Sets
The mass set is a fundamental component of the deadweight tester.
The BH2 series uses non-magnetic stainless steel masses.
The ergonomic shape of the masses facilitates loading onto the weight carrier.
Depending on the selected configuration, the masses can be marked according to the required pressure unit.
Typical units include:
bar
mbar
kPa
psi
and other available engineering units.
The total mass of the weight set depends on the selected model and configuration.
Standard Gravity and Local Gravity
The force generated by the calibrated masses depends directly on gravitational acceleration.
The conventional standard value is:
g = 9.80665 m/s²
However, actual gravitational acceleration varies depending on geographical location.
The europascal BH2-30B can therefore be configured for either standard gravity or a specified local gravity value.
This is important in high-accuracy pressure metrology because a change in gravitational acceleration directly changes the force generated by the calibrated masses.
Correct consideration of local gravity can therefore improve the accuracy of the generated reference pressure.
Technical Highlights
Model: europascal BH2-30B
Device type: Hydraulic Deadweight Tester
Product family: BH2 High Performance
Configuration: Single piston
Number of pistons: 1
Measuring range: 0.1 to 30 bar
Measuring range: 10 to 3,000 kPa
Measuring range: 2 to 400 psi
Maximum pressure: 30 bar / 3 MPa
Accuracy: 0.01 % of reading
Enhanced accuracy: Up to 0.006 % on request
Measurement principle: Piston gauge
Pressure generation: Hydraulic
Pressure medium: H15 oil
Fluid density: Approx. 845 kg/m³
Generator base: CH2-125B
Typical piston area: 78.4825 mm²
Piston material: Treated steel
Cylinder material: Treated steel
Repeatability: 3 × 10⁻⁵
Sensitivity: 1 × 10⁻⁵
Device weight without masses: Approx. 22 kg
Operating temperature: 18 to 28 °C
Standard gravity: 9.80665 m/s²
Technical Data
| Feature | europascal BH2-30B |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH2-30B |
| Device type | Hydraulic Deadweight Tester |
| Product family | BH2 High Performance |
| Configuration | Single piston |
| Number of pistons | 1 |
| Measuring range | 0.1–30 bar |
| Measuring range | 10–3,000 kPa |
| Measuring range | 2–400 psi |
| Maximum pressure | 30 bar / 3 MPa |
| Accuracy | 0.01 % of reading |
| Enhanced accuracy | Up to 0.006 % on request |
| Measurement principle | Piston gauge |
| Pressure medium | H15 oil |
| Fluid density | Approx. 845 kg/m³ |
| Generator base | CH2-125B |
| Typical piston area | 78.4825 mm² |
| Piston material | Treated steel |
| Cylinder material | Treated steel |
| Repeatability | 3 × 10⁻⁵ |
| Sensitivity | 1 × 10⁻⁵ |
| Weight without mass set | Approx. 22 kg |
| Operating temperature | 18–28 °C |
| Standard gravity | 9.80665 m/s² |
| Local gravity | Configurable |
| Motorization | Optional |
| Piston position visualization | Optional |
| Automatic pressure calculation | Optional |
| Data transfer | Optional |
Optional Motorization and Piston Position Visualization
The europascal BH2-30B can be equipped with option OP0004.
With this option, the weight system is motorized and the piston position can be visualized.
Rotation supports free piston movement and helps reduce disturbing friction effects between the piston and cylinder.
Piston position visualization also helps the operator determine whether the piston is within the appropriate working position.
This can significantly improve operating convenience during repetitive calibration procedures.
With OP0004 installed, the weight of the deadweight tester without the mass set increases from approximately 22 kg to approximately 24 kg.
Optional Automatic Pressure Calculation
For laboratories requiring additional automation, the BH2-30B can be equipped with option OP0301.
This configuration adds advanced functionality for automatically determining and displaying the generated reference pressure.
Depending on the configuration, relevant physical quantities can be incorporated into the pressure calculation.
The system can support parameters such as:
- Temperature
- Atmospheric pressure
- Humidity
- Gravitational acceleration
- Applied masses
- Piston-cylinder characteristics
Dynamic piston position visualization provides additional assistance during operation.
Data transfer also facilitates integration of the BH2-30B into digitally supported calibration workflows.
BH2-30B Compared with BH2-60B and BH2-150B
The BH2 series provides several hydraulic single-piston models for different pressure ranges.
| Model | Configuration | Pistons | Measuring Range |
|---|---|---|---|
| BH2-30B | Single piston | 1 | 0.1–30 bar |
| BH2-60B | Single piston | 1 | 0.2–60 bar |
| BH2-150B | Single piston | 1 | 0.5–150 bar |
The BH2-30B provides the lowest starting pressure of these three models.
It is therefore particularly suitable for laboratories that need to generate relatively low hydraulic reference pressures.
If pressures above 30 bar are required, the BH2-60B or BH2-150B provides a larger measurement range.
BH2 High Performance Series
The europascal Aremeca BH2 family covers a very broad range of hydraulic pressure calibration applications.
In addition to the BH2-30B, the product family includes higher-pressure single-piston and dual-piston models.
This allows laboratories to select a deadweight tester according to the required pressure range, accuracy and piston configuration.
The modular concept also allows additional functions to be added when increased automation or operator assistance is required.
Further europascal Aremeca products can be found here.
Calibration Certificate and Service
The europascal BH2-30B is designed as a physical reference standard for professional pressure metrology.
An optional COFRAC or DKD/DAkkS accredited calibration certificate is available from the manufacturer.
Regular calibration of the piston-cylinder system and mass set is essential for maintaining traceability and reliable metrological performance.
The europascal calibration service provides professional calibration solutions for deadweight testers, piston gauges, reference pressure instruments, pressure gauges, sensors and transmitters.
europascal can also support customers with product selection, configuration of the mass set and pressure units, maintenance, service and repair.
Why Choose the europascal BH2-30B?
The europascal BH2-30B Precise Hydraulic Deadweight Tester combines a particularly low starting pressure of 0.1 bar with a maximum pressure of 30 bar and an accuracy of 0.01 % of reading.
For particularly demanding applications, accuracy up to 0.006 % is available on request.
The single-piston configuration covers the complete 1:300 measuring range without requiring a piston change.
A typical piston area of 78.4825 mm², treated steel piston and cylinder, calibrated stainless steel masses and the CH2-125B pressure generator provide a robust foundation for professional pressure calibration.
Optional motorization, piston position visualization and automatic pressure calculation allow the system to be adapted to more efficient calibration workflows.
Combined with professional advice, calibration and service from europascal, the BH2-30B provides an excellent physical pressure reference for low to medium hydraulic pressures.
Typical Calibration Applications with the europascal BH2-30B
The europascal BH2-30B is particularly suitable for calibrating precision pressure gauges, digital pressure gauges, reference pressure instruments, pressure sensors, pressure transmitters, pressure transducers, pressure switches, hydraulic pressure gauges and industrial process instruments.
Typical application areas include professional calibration laboratories, pressure instrument manufacturers, mechanical engineering, plant engineering, research and development and industrial quality assurance.
Looking for the europascal BH2-30B or a precise hydraulic pressure calibration solution? Contact europascal for expert advice, configuration options and professional calibration services tailored to your requirements.
