The europascal BH2-300B Single Piston Deadweight Tester is a high-performance hydraulic pressure standard designed for precise pressure calibration from 1 to 300 bar. Its single-piston design combines a wide measuring range, straightforward operation and excellent long-term stability, making the BH2-300B an ideal solution for professional calibration laboratories, industrial metrology, quality assurance and research applications.
The measuring range extends from 1 to 300 bar, corresponding to 100 to 30,000 kPa or 15 to 4,000 psi. The complete range is covered by one precision piston-cylinder system. This makes the BH2-300B particularly convenient for laboratories that require a broad hydraulic pressure range without changing between different piston-cylinder assemblies.
The standard accuracy is 0.01 % of reading. For particularly demanding calibration applications, an enhanced accuracy of up to 0.006 % is available on request.
At the heart of the system is a precision piston with a typical cross-sectional area of 7.84875 mm². The piston is manufactured from tungsten carbide, while the cylinder is 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 robust 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 Single Piston Deadweight Tester combines a wide hydraulic measuring range with high accuracy and a robust single-piston design.
Key benefits include:
- High-performance hydraulic deadweight tester
- Single precision piston-cylinder system
- Measuring range from 1 to 300 bar
- Measuring range from 100 to 30,000 kPa
- Measuring range from 15 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
- Typical piston area of 7.84875 mm²
- Tungsten carbide piston
- Treated steel cylinder
- CH2-1250B pressure generator
- H40 oil as pressure medium
- Fluid density approximately 860 kg/m³
- Approx. 22 kg device weight without weights
- Stainless steel calibration masses
- Different pressure units available
- Standard gravity or customer-specific local gravity
- Optional motorized weight rotation
- Optional piston position visualization
- Optional automatic pressure calculation
- Optional environmental compensation
- Optional computer data transfer
- Optional accredited calibration certificate
- Professional calibration and service from europascal
Ideal for Demanding Calibration Applications
The europascal BH2-300B 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
- Industrial process instruments
- Secondary pressure standards
The wide measuring range makes the BH2-300B particularly useful for calibration laboratories working with a broad selection of industrial pressure instruments.
Common ranges such as 10 bar, 25 bar, 40 bar, 60 bar, 100 bar, 160 bar, 250 bar and 300 bar can be covered with one pressure standard.
Pressure Range from 1 to 300 bar
The europascal BH2-300B covers a measuring range from:
1 to 300 bar
This corresponds to:
100 to 30,000 kPa
or:
15 to 4,000 psi
The maximum pressure is therefore:
300 bar / 30 MPa
The complete measuring range is covered by a single piston-cylinder assembly.
This is the fundamental difference between the BH2-300B Single Piston and the BH2-300B DP Dual Piston version.
For laboratories that prefer a straightforward single-piston configuration, the BH2-300B provides an excellent combination of range, accuracy and ease of operation.
Accuracy of 0.01 % of Reading
The europascal BH2-300B Single Piston Deadweight Tester provides a standard accuracy of:
0.01 % of reading
For particularly demanding metrological applications, enhanced accuracy of:
up to 0.006 %
is available on request.
The complete measurement uncertainty of a calibration additionally depends on relevant influence quantities such as:
- Calibration of the masses
- Effective piston area
- Local gravitational acceleration
- Air buoyancy
- Piston-cylinder temperature
- Pressure deformation
- Density of the hydraulic fluid
- Hydrostatic head difference
- Repeatability
- Resolution of the device under test
- Environmental conditions
These quantities should be considered when establishing the measurement uncertainty budget for high-accuracy pressure calibration.
Fundamental Piston Gauge Measurement Principle
The europascal BH2-300B operates according to the fundamental physical measurement principle of a piston gauge.
Pressure is generated by applying a precisely defined force to a characterized 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 the calibrated masses is primarily determined by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified pressure relationship therefore becomes:
p = (m × g) / A
For precision measurements, additional corrections may be applied for air buoyancy, local gravitational acceleration, piston temperature, pressure deformation and hydrostatic head.
Because pressure is derived from physical quantities such as mass, gravity and effective piston area, the deadweight tester provides excellent long-term stability as a reference pressure standard.
Precision Single-Piston Design
The defining characteristic of the europascal BH2-300B is its single-piston configuration.
The complete measuring range from 1 to 300 bar is covered using one precision piston-cylinder system.
The typical piston area is:
7.84875 mm²
The piston is manufactured from:
tungsten carbide
while the cylinder is manufactured from:
treated steel
Tungsten carbide provides excellent hardness, dimensional stability and wear resistance, making it particularly suitable for high-precision piston components.
Using only one piston simplifies everyday operation and avoids the need to change between low-pressure and high-pressure piston-cylinder systems.
Hydraulic Operation with H40 Oil
The europascal BH2-300B is a hydraulic deadweight tester.
The specified pressure medium is:
H40 oil
with a density of approximately:
860 kg/m³
The hydraulic pressure medium transfers the generated pressure to both the precision piston-cylinder assembly and the connected device under test.
The use of oil provides stable pressure generation and makes the system suitable for pressure instruments that are compatible with hydraulic calibration media.
For precision calibration, 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.
The resulting hydrostatic head can then be included in the pressure calculation.
CH2-1250B Pressure Generator
The europascal BH2-300B uses the:
CH2-1250B generator base
The generator allows the operator to generate and precisely regulate hydraulic pressure.
The capstan displaces the hydraulic fluid through the system until the generated pressure balances the force applied to the piston by the calibrated masses.
Fine pressure adjustment allows the piston to be brought into its correct operating position.
The CH2-1250B pressure generator, piston-cylinder system and calibrated mass set together form the complete physical pressure standard.
Stainless Steel Weight Sets
The calibrated masses are an essential part of the BH2-300B measurement system.
The masses are manufactured from:
stainless steel
and feature an ergonomic design for convenient handling.
The principal weight set can be supplied according to the required pressure unit.
Available units include:
bar
kPa
psi
and other available engineering units.
Intermediate weight sets and additional principal weight sets for different pressure units are also available.
This allows the BH2-300B to be configured according to the requirements of the calibration laboratory.
Standard Gravity and Local Gravity
The generated pressure depends directly on gravitational acceleration.
The conventional standard gravitational acceleration is:
g = 9.80665 m/s²
However, actual gravitational acceleration varies according to geographical location.
The BH2-300B can therefore be supplied for either standard gravity or a specified local gravity value.
This is important for high-accuracy calibration because the force generated by the calibrated masses is directly proportional to gravitational acceleration.
Correct consideration of local gravity contributes to reducing measurement uncertainty.
Technical Highlights
Model: europascal BH2-300B
Manufacturer reference: BH2-300B SP
Device type: Single Piston Hydraulic Deadweight Tester
Product family: BH2 High Performance
Configuration: Single piston
Number of pistons: 1
Measuring range: 1 to 300 bar
Measuring range: 100 to 30,000 kPa
Measuring range: 15 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
Typical piston area: 7.84875 mm²
Piston material: Tungsten carbide
Cylinder material: Treated steel
Number of pistons: 1
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 |
|---|---|
| Manufacturer | europascal Aremeca |
| Manufacturer reference | BH2-300B SP |
| Device type | Hydraulic Deadweight Tester |
| Product family | BH2 High Performance |
| Configuration | Single piston |
| Number of pistons | 1 |
| Measuring range | 1–300 bar |
| Measuring range | 100–30,000 kPa |
| Measuring range | 15–4,000 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 |
| Typical piston area | 7.84875 mm² |
| Piston material | Tungsten carbide |
| Cylinder material | Treated steel |
| Weight without mass set | 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 can be equipped with option OP0004.
This option provides:
- Motorized rotation of the masses
- Piston position visualization using indicator lights
- Increased operator convenience
- Improved support during repetitive calibration procedures
Rotation of the piston and mass system helps minimize friction effects and supports stable operation of the piston-cylinder assembly.
The piston position visualization helps the operator determine whether the piston is within the appropriate working position.
With option OP0004 installed, the device weight without the mass set increases from approximately 22 kg to 24 kg.
Optional Automatic Pressure Calculation
For laboratories requiring a higher degree of automation, the BH2-300B can be equipped with option OP0301.
The calculator module provides:
- 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 of calibration data
- Support for calibration certificate generation
This option combines the fundamental physical measurement principle of the piston gauge with modern digital functionality.
It can reduce manual calculations and simplify repetitive calibration workflows.
BH2-300B Single Piston vs. BH2-300B DP Dual Piston
AREMECA offers the 300 bar BH2 pressure standard in two different configurations:
BH2-300B SP – Single Piston
and:
BH2-300B DP – Dual Piston
The europascal BH2-300B described on this page is the single-piston version.
| Feature | BH2-300B SP | BH2-300B DP |
|---|---|---|
| Configuration | Single piston | Dual piston |
| Number of pistons | 1 | 2 |
| Maximum pressure | 300 bar | 300 bar |
| Standard accuracy | 0.01 % of reading | 0.01 % of reading |
| Main advantage | Simple single-piston operation | Optimized dual-piston range |
The single-piston BH2-300B is particularly attractive when straightforward operation with one piston-cylinder system is preferred.
The BH2-300B DP uses two different piston-cylinder systems to optimize operation across its wide pressure range.
The correct configuration can therefore be selected according to the laboratory’s workload and operating requirements.
BH2 High Performance Series
The europascal Aremeca BH2 High Performance series provides a broad selection of hydraulic deadweight testers.
Single-piston models include pressure ranges such as:
BH2-30B: 0.1 to 30 bar
BH2-60B: 0.2 to 60 bar
BH2-150B: 0.5 to 150 bar
BH2-300B SP: 1 to 300 bar
BH2-400B SP: 1 to 400 bar
BH2-600B SP: 2 to 600 bar
BH2-700B SP: 2 to 700 bar
BH2-1200B SP: 2 to 1,200 bar
Additional BH2 models extend the hydraulic pressure range to several thousand bar.
Dual-piston versions are also available for selected pressure ranges.
Further europascal Aremeca products can be found here.
Calibration Certificate and Service
The europascal BH2-300B is supplied with a factory calibration certificate traceable to national standards.
An optional COFRAC or DKD/DAkkS calibration certificate is available.
The standard delivery also includes operating instructions, the product data sheet and hydraulic oil.
Regular calibration of the piston-cylinder system and mass set is essential for maintaining reliable measurement traceability and long-term metrological performance.
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 can also provide support for product selection, system configuration, maintenance and service.
Why Choose the europascal BH2-300B?
The europascal BH2-300B Precise Single Piston Deadweight Tester combines a wide hydraulic measuring range from 1 to 300 bar with straightforward single-piston operation.
Its standard accuracy of 0.01 % of reading makes it suitable for demanding professional pressure calibration. Enhanced accuracy up to 0.006 % is available on request.
The single tungsten carbide piston with a typical area of 7.84875 mm², treated steel cylinder, H40 hydraulic oil and CH2-1250B pressure generator provide a robust foundation for professional pressure metrology.
Optional motorization, piston position visualization and automatic pressure calculation enable the instrument to be adapted to advanced calibration workflows.
Combined with professional advice, calibration and service from europascal, the BH2-300B provides an excellent physical pressure reference for professional calibration laboratories and industrial metrology.
Typical Calibration Applications with the europascal BH2-300B
The europascal BH2-300B 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 up to 300 bar.
Looking for the europascal BH2-300B or a precise single-piston hydraulic pressure calibration solution? Contact europascal for expert advice, product configuration and professional calibration services tailored to your requirements.
