The europascal BH4-2500B Automatic Deadweight Tester is a high-performance hydraulic pressure standard designed for precise and efficient calibration from 40 to 2,500 bar. With an accuracy of 0.02 %, the BH4-2500B combines the proven physical measurement principle of a piston gauge with the advanced automatic functionality of the BH4 series.
The instrument covers a measuring range from 40 to 2,500 bar, corresponding to 4 to 250 MPa and approximately 600 to 36,200 psi according to the manufacturer. This makes the BH4-2500B particularly suitable for professional calibration laboratories that require reliable hydraulic pressure generation well into the high-pressure range.
The BH4-2500B uses a single piston-cylinder system. The reference pressure is physically generated by calibrated masses acting on the precision piston. At the same time, the automatic BH4 platform provides motorization, dynamic piston position visualization, automatic calculation and display of the generated pressure, calibration data recording and computer data transfer.
The result is a powerful high-pressure standard combining physical traceability with convenient automated operation.
europascal provides professional support for pressure calibration equipment, system configuration, maintenance and calibration. The europascal calibration service provides professional calibration solutions for deadweight testers, pressure balances, pressure gauges, pressure sensors, transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The europascal BH4-2500B Automatic Deadweight Tester combines high-pressure capability with automated calibration functions.
Key benefits include:
- Automatic hydraulic deadweight tester
- Measuring range from 40 to 2,500 bar
- Measuring range from 4 to 250 MPa
- Manufacturer range from 600 to 36,200 psi
- Accuracy of 0.02 %
- Single-piston configuration
- One precision piston-cylinder system
- Hydraulic operation with oil
- Physical piston gauge measurement principle
- Stainless steel calibration masses
- Motorized mass rotation
- Dynamic piston position visualization
- Automatic pressure calculation
- Automatic display of generated pressure
- Different pressure units
- Calibration result recording
- Computer data transfer
- Standard or customer-specific gravity
- Designed for professional high-pressure calibration laboratories
Measuring Range from 40 to 2,500 bar
The europascal BH4-2500B covers a hydraulic measuring range from:
40 to 2,500 bar
This corresponds to:
4,000 to 250,000 kPa
or:
4 to 250 MPa
The manufacturer specifies the imperial measuring range as:
600 to 36,200 psi
The maximum pressure is therefore:
2,500 bar / 250 MPa
This wide high-pressure range makes the BH4-2500B suitable for calibration of pressure gauges, sensors, transmitters and other high-pressure measuring instruments used in industrial and laboratory applications.
Accuracy of 0.02 %
The product-specific AREMECA data identifies the accuracy of the BH4-2500B as:
0.02 %
This product-specific value should be used when evaluating the BH4-2500B rather than the general maximum-performance statements used for the complete BH4 product family.
The actual measurement uncertainty of a calibration additionally depends on the pressure balance configuration, calibration certificate and measurement conditions.
Relevant uncertainty contributions can include:
- Calibration of the mass set
- Effective piston area
- Pressure coefficient
- Local gravitational acceleration
- Air buoyancy
- Piston-cylinder temperature
- Pressure deformation
- Hydraulic fluid properties
- Hydrostatic head difference
- Repeatability
- Resolution of the device under test
- Environmental conditions
The complete uncertainty budget should therefore be evaluated for the actual calibration procedure.
Physical Piston Gauge Measurement Principle
The europascal BH4-2500B Automatic Deadweight Tester operates according to the physical piston gauge principle.
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 the calibrated masses is primarily determined by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified pressure relationship is therefore:
p = (m × g) / A
At high pressures, the effective piston area is not necessarily treated as a constant. Pressure deformation, temperature and other correction quantities can become relevant when calculating the reference pressure with low measurement uncertainty.
Single-Piston High-Pressure Design
The europascal BH4-2500B uses:
one precision piston-cylinder system
The complete specified measuring range from 40 to 2,500 bar is generated using this single piston system.
This provides straightforward operation because the operator does not need to switch between separate low-pressure and high-pressure pistons.
The high-pressure piston-cylinder system is optimized for generating pressures up to 250 MPa.
High-Pressure Calibration up to 250 MPa
A maximum pressure of 2,500 bar corresponds to:
250 MPa
This places the BH4-2500B clearly within the high-pressure calibration range.
At these pressures, careful attention must be paid to the complete hydraulic measurement setup.
This includes:
- Pressure-rated tubing
- High-pressure fittings
- Suitable adapters
- Correct pressure medium
- Device-under-test pressure rating
- Safe depressurization procedures
- Clean hydraulic connections
All components connected to the pressure system must be suitable for the maximum applied pressure.
Automatic BH4 Platform
The BH4 series combines the physical measurement principle of a deadweight tester with automatic operator assistance.
The integrated platform provides functions such as:
- Motorized operation
- Dynamic visualization of piston position
- Automatic pressure calculation
- Automatic pressure display
- Different measurement units
- Operator assistance during calibration
- Recording of calibration results
- Computer data transfer
The reference pressure itself continues to be generated physically by the calibrated masses and precision piston-cylinder system.
Automation primarily simplifies operation, calculation, monitoring and documentation.
Motorized Mass Rotation
Free rotation of the piston helps minimize friction between the piston and cylinder.
The BH4 platform provides:
motorized rotation of the mass system
This reduces the need for continuous manual rotation and improves operator convenience during repetitive calibration sequences.
Motorized operation is particularly useful in high-pressure calibration procedures where stable operating conditions and consistent handling are important.
Dynamic Piston Position Visualization
Correct piston position is essential for reliable deadweight tester operation.
The BH4 system provides:
dynamic visualization of the piston position
The operator can monitor the piston during calibration and determine whether it is operating within its appropriate working position.
This simplifies the process of balancing the pressure generated by the pressure balance against the connected device under test.
Automatic Pressure Calculation and Display
The integrated calculator determines the generated reference pressure using the relevant pressure balance parameters.
These can include:
- Applied calibration masses
- Effective piston area
- Gravitational acceleration
- Environmental parameters
- Relevant correction quantities
The resulting reference pressure is displayed automatically.
This reduces manual calculation effort and supports consistent calibration procedures.
Different Pressure Units with the Same Weight Set
The BH4 platform allows different pressure units to be used with the same physical calibration mass set.
Depending on configuration, pressure can be displayed in units such as:
- bar
- kPa
- MPa
- psi
- kg/cm²
This provides flexibility when calibrating devices from different manufacturers or for customers using different engineering units.
Calibration Result Recording
The europascal BH4-2500B supports digital recording of calibration results.
This can simplify:
- Calibration documentation
- Measurement traceability
- Quality assurance
- Calibration history
- Evaluation of devices under test
- Digital laboratory workflows
Electronic recording also reduces the risk of transcription errors associated with manually transferring measurement values.
Computer Data Transfer
Calibration data can be transferred to a computer for further processing.
This allows the BH4-2500B to be integrated into modern digital calibration workflows.
For laboratories processing large numbers of calibration points, digital data transfer can significantly reduce manual documentation effort.
Hydraulic Operation with Oil
The europascal BH4-2500B is a hydraulic pressure balance operating with oil.
Hydraulic operation is particularly suitable for generating very high pressures because hydraulic liquids have low compressibility compared with gases.
At pressures up to 2,500 bar, cleanliness of the hydraulic circuit is especially important.
Contamination can influence precision components and should therefore be minimized during installation, maintenance and connection of devices under test.
Calibration Masses
The BH4 series uses precision calibration masses to generate the force acting on the piston.
The calibrated mass values form an essential part of the pressure reference.
Together with the effective piston area and gravitational acceleration, the masses determine the generated reference pressure.
AREMECA specifies stainless steel masses for the automatic BH4 series.
Standard or Local Gravity
The force generated by calibration masses depends directly on gravitational acceleration.
The conventional standard value is:
g = 9.80665 m/s²
Actual gravitational acceleration varies geographically.
For precision calibration, the appropriate local gravity value should therefore be considered.
The instrument can be configured according to standard gravity or a specified customer gravity value.
Technical Highlights
Model: europascal BH4-2500B
Device type: Automatic Hydraulic Deadweight Tester
Product family: BH4 Automatic
Configuration: Single piston
Number of pistons: 1
Measuring range: 40 to 2,500 bar
Measuring range: 4,000 to 250,000 kPa
Measuring range: 4 to 250 MPa
Manufacturer imperial range: 600 to 36,200 psi
Maximum pressure: 2,500 bar / 250 MPa
Accuracy: 0.02 %
Measurement principle: Piston gauge / deadweight tester
Pressure medium: Oil
Calibration masses: Stainless steel
Motorized operation: Integrated
Piston position visualization: Dynamic
Automatic pressure calculation: Integrated
Automatic pressure display: Integrated
Result recording: Integrated
Computer data transfer: Integrated
Standard gravity: 9.80665 m/s²
Technical Data
| Feature | europascal BH4-2500B |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH4-2500B |
| Device type | Automatic Hydraulic Deadweight Tester |
| Product family | BH4 Automatic |
| Configuration | Single piston |
| Number of pistons | 1 |
| Measuring range | 40–2,500 bar |
| Measuring range | 4–250 MPa |
| Measuring range | 4,000–250,000 kPa |
| Manufacturer imperial range | 600–36,200 psi |
| Maximum pressure | 2,500 bar / 250 MPa |
| Accuracy | 0.02 % |
| Measurement principle | Piston gauge |
| Pressure medium | Oil |
| Calibration masses | Stainless steel |
| Motorized operation | Integrated |
| Piston position visualization | Dynamic |
| Automatic pressure calculation | Integrated |
| Automatic pressure display | Integrated |
| Result recording | Integrated |
| Computer data transfer | Integrated |
| Standard gravity | 9.80665 m/s² |
BH4-2500B vs. BH2-2500B
AREMECA offers both automatic BH4 and high-performance BH2 platforms for this pressure range.
| Feature | BH4-2500B | BH2-2500B |
|---|---|---|
| Pressure range | 40–2,500 bar | 40–2,500 bar |
| Number of pistons | 1 | 1 |
| Standard accuracy | 0.02 % | 0.02 % |
| Basic concept | Automatic | High-performance manual platform |
| Motorization | Integrated BH4 function | Available as option |
| Dynamic piston visualization | Integrated BH4 function | Available with automation option |
| Automatic pressure calculation | Integrated BH4 function | Available with calculator option |
| Digital workflow | Integrated | Optional |
The BH4-2500B is therefore particularly suitable when the benefits of automation are required for regular or intensive calibration work.
Position within the BH4 High-Pressure Series
The BH4 automatic series covers several high-pressure ranges.
| Model | Pressure Range | Accuracy |
|---|---|---|
| BH4-2000B | 40–2,000 bar | 0.02 % |
| BH4-2500B | 40–2,500 bar | 0.02 % |
| BH4-3000B | 40–3,000 bar | 0.02 % |
| BH4-4000B | 40–4,000 bar | 0.02 % |
| BH4-5000B | 40–5,000 bar | 0.02 % |
| BH4-6000B | 200–6,000 bar | 0.05 % |
| BH4-7000B | 200–7,000 bar | 0.05 % |
The BH4-2500B therefore provides an excellent solution for applications requiring automatic pressure calibration up to 250 MPa without moving into the still higher 3,000 to 7,000 bar ranges.
Typical Calibration Applications
The europascal BH4-2500B Automatic Deadweight Tester is suitable for testing, adjustment and calibration of high-pressure measuring instruments including:
- High-pressure gauges
- Digital pressure gauges
- Pressure sensors
- Pressure transducers
- Pressure transmitters
- High-pressure indicators
- Reference pressure instruments
- Industrial hydraulic measuring systems
- High-pressure calibration equipment
Typical users include professional calibration laboratories, pressure instrument manufacturers, industrial quality assurance departments, research laboratories and calibration service organizations.
Calibration and Traceability
Regular calibration is important for maintaining the metrological performance of a high-pressure deadweight tester.
Important parameters include:
- Piston-cylinder assembly
- Effective piston area
- Pressure coefficient
- Calibration mass set
- Temperature behavior
- Gravity value
- Repeatability
- Relevant correction quantities
The europascal calibration service provides professional calibration solutions for deadweight testers, pressure balances, high-pressure gauges, sensors, transmitters and other pressure measuring equipment.
europascal can also provide support with maintenance, system configuration and selection of suitable high-pressure calibration equipment.
Why Choose the europascal BH4-2500B?
The europascal BH4-2500B Precise Automatic Deadweight Tester combines a wide hydraulic pressure range from 40 to 2,500 bar with 0.02 % accuracy and the advanced automatic functionality of the BH4 platform.
Its single-piston configuration provides continuous high-pressure operation up to 250 MPa, while calibrated masses and the precision piston-cylinder system provide the physical basis for reliable reference pressure generation.
Motorized operation, dynamic piston position visualization, automatic pressure calculation and display, calibration result recording and computer data transfer reduce operator workload and simplify repetitive calibration procedures.
For professional laboratories requiring precise automatic hydraulic calibration up to 2,500 bar, the BH4-2500B provides an excellent combination of high-pressure capability, metrological performance and automation.
Looking for the europascal BH4-2500B or an automatic hydraulic pressure calibration solution up to 2,500 bar? Contact europascal for expert advice, system configuration and professional calibration services tailored to your requirements.
