The europascal EP-G25k Low Pressure Deadweight Tester is a high precision pneumatic pressure calibrator designed for the accurate generation and calibration of very low pressures. With a gauge pressure generation range from 0.02 to 25 kPa, equivalent to 0.2 to 250 mbar, and a differential pressure range from 0.005 to 25 kPa, the EP-G25k provides an excellent solution for demanding low pressure metrology applications.
Very low pressure calibration requires exceptional sensitivity and stability. Even small pressure deviations can have a significant influence on measurement results. The europascal EP-G25k is specifically designed to address these requirements and provides accuracy of up to ±0.015 % of reading, depending on pressure range and configuration.
The system operates pneumatically and can be supplied with compressed air or nitrogen. Its measurement concept makes it suitable for calibration laboratories, industrial metrology departments, research facilities and organizations requiring reliable reference pressures in the millibar and low kilopascal range.
At europascal, professional expertise in pressure metrology is combined with comprehensive calibration services to provide complete solutions for low pressure measurement and calibration.
Features and Benefits of the europascal EP-G25k
The europascal EP-G25k combines high accuracy with a pressure range specifically optimized for very low pneumatic pressures.
Important features and benefits include:
- High precision low pressure generation
- Gauge pressure range from 0.02 to 25 kPa
- Gauge pressure range from 0.2 to 250 mbar
- Differential pressure range from 0.005 to 25 kPa
- Accuracy up to ±0.015 % of reading
- Fixed uncertainty specification at very low pressures
- Stabilization of measured values in less than 10 seconds
- Pneumatic operation
- Operation with compressed air or nitrogen
- External pressure supply from 3 to 4 bar
- Internal pressure setting of 1.5 bar ±75 mbar
- Suitable for clean and dry compressed air
- Compact laboratory design
- Separate storage case for pistons, accessories and weights
- Additional weight sets in alternative pressure units available on request
This combination makes the EP-G25k particularly useful for calibration applications where conventional pressure balances or pressure controllers may not provide sufficient performance at very low pressures.
Precise Very Low Pressure Generation
The europascal EP-G25k Low Pressure Deadweight Tester is designed for accurate pressure generation close to atmospheric pressure.
The pressure generation ranges specified in the datasheet are:
Gauge pressure:
0.02 to 25 kPa
Gauge pressure:
0.2 to 250 mbar
Differential pressure:
0.005 to 25 kPa
This broad low pressure capability allows the EP-G25k to cover numerous calibration tasks involving pressure sensors and instruments designed for small pressure differences.
The system also specifies a static pressure of 3 mbar (0.3 kPa). EP-G25k-D Very Low Pressure Dea…
Accuracy up to ±0.015 % of Reading
One of the most important characteristics of the europascal EP-G25k is its excellent measurement performance.
The specified accuracy depends on the generated pressure.
For the highest performance configuration, the datasheet specifies the following limits:
| Pressure Generation Range | Accuracy |
|---|---|
| 0.005 ≤ Pn < 0.4 kPa | ±0.10 Pa |
| 0.4 ≤ Pn < 2 kPa | ±0.025 % |
| 2 ≤ Pn ≤ 25 kPa | ±0.015 % |
An alternative accuracy specification is also provided:
| Pressure Generation Range | Alternative Accuracy |
|---|---|
| 0.005 ≤ Pn < 0.4 kPa | ±0.12 Pa |
| 0.4 ≤ Pn < 2 kPa | ±0.03 % |
| 2 ≤ Pn ≤ 25 kPa | ±0.02 % |
For generated pressures below 0.4 kPa, the manufacturer specifies a fixed error rather than a percentage of reading. EP-G25k-D Very Low Pressure Dea…
This distinction is particularly important in very low pressure metrology because a percentage specification becomes increasingly small as the generated pressure approaches zero.
Fast Pressure Stabilization
Stable pressure conditions are essential for reliable calibration.
The europascal EP-G25k provides stabilization of measured values in less than 10 seconds under the specified operating conditions. EP-G25k-D Very Low Pressure Dea…
Fast stabilization can reduce waiting times between individual calibration points and therefore improve laboratory productivity.
This is especially useful when performing calibrations involving multiple increasing and decreasing pressure points.
Gauge and Differential Pressure Calibration
The europascal EP-G25k supports both gauge and differential pressure applications.
Gauge Pressure Calibration
For gauge pressure measurements, the system covers pressures from 0.02 to 25 kPa, corresponding to 0.2 to 250 mbar.
This makes the EP-G25k suitable for many low pressure gauges, transmitters and sensors.
Differential Pressure Calibration
For differential pressure applications, the specified range begins at only 0.005 kPa, equivalent to 5 Pa, and extends to 25 kPa.
This extremely low starting point is particularly valuable when calibrating sensitive differential pressure measurement equipment.
Differential pressure measurement is widely used in applications where relatively small pressure differences must be detected accurately.
Applications for Low Pressure Calibration
The europascal EP-G25k can be used for numerous laboratory and industrial calibration tasks.
Differential Pressure Transmitters
Differential pressure transmitters require accurate reference pressures to verify zero point, span, linearity and hysteresis.
The low starting pressure of the EP-G25k makes it suitable for sensitive differential pressure devices.
Low Pressure Gauges
Analog and digital pressure gauges operating in the millibar or low kilopascal range can be compared with the pressure generated by the EP-G25k.
Pressure Sensors
Low pressure sensors can be evaluated at multiple pressure points to determine their measurement deviation and repeatability.
HVAC Measurement Equipment
Low differential pressures are commonly encountered in ventilation and air handling systems.
Suitable pressure instruments used in these applications can be calibrated using precise low pressure references.
Filter and Flow Applications
Differential pressure is frequently used to determine pressure drop across filters, flow elements and other components.
The EP-G25k can provide reference pressures for calibration of the corresponding measurement equipment.
Calibration Laboratories
Professional calibration laboratories can use the europascal EP-G25k for demanding low pressure calibration tasks requiring low measurement uncertainty and excellent pressure resolution.
Pneumatic Operation with Air or Nitrogen
The europascal EP-G25k Low Pressure Deadweight Tester is powered by compressed air or nitrogen.
The required external pressure supply is:
3 to 4 bar
The internal pressure is set to:
1.5 bar ±75 mbar
When compressed air is used, the datasheet specifies clean and dry air with:
Purity class 1-2-1 according to ISO 8573-1
These requirements help ensure stable operation and protect the sensitive pneumatic components against contamination. EP-G25k-D Very Low Pressure Dea…
Reference Conditions for Accuracy
The specified accuracy of a high precision pressure standard depends on environmental conditions.
For the europascal EP-G25k, the datasheet defines the following reference conditions:
| Influence Quantity | Reference Condition |
|---|---|
| Ambient temperature | 20 ±1 °C |
| Atmospheric pressure | 101.325 ±3 kPa |
| Relative humidity | 50 ±20 % |
These reference conditions should be considered when evaluating the performance of the pressure calibrator and establishing the measurement uncertainty budget. EP-G25k-D Very Low Pressure Dea…
Technical Specifications of the europascal EP-G25k
| Parameter | Specification |
|---|---|
| Manufacturer | europascal |
| Model | EP-G25k |
| Instrument type | Very Low Pressure Deadweight Tester |
| Pressure medium | Air or nitrogen |
| Gauge pressure range | 0.02–25 kPa |
| Gauge pressure range | 0.2–250 mbar |
| Differential pressure range | 0.005–25 kPa |
| Static pressure | 3 mbar / 0.3 kPa |
| Best specified accuracy | Up to ±0.015 % of reading |
| Stabilization time | <10 s |
| External pressure supply | 3–4 bar |
| Internal pressure setting | 1.5 bar ±75 mbar |
| Compressed air quality | ISO 8573-1 class 1-2-1 |
| Reference temperature | 20 ±1 °C |
| Reference atmospheric pressure | 101.325 ±3 kPa |
| Reference relative humidity | 50 ±20 % |
| Calibrator dimensions | 390 × 310 × 240 mm |
| Calibrator weight | 13.5 kg |
| Storage case dimensions | 390 × 310 × 147 mm |
| Storage case weight | 5.3 kg |
The dimensions and weights are specified separately for the calibrator and its storage case. EP-G25k-D Very Low Pressure Dea…
Flexible Pressure Units
Different laboratories and industries use different pressure units.
For this reason, the europascal EP-G25k can optionally be supplied with an additional set of weights in measurement units different from the primary weight set.
The technical documentation specifically mentions units such as:
- kg/m²
- bar
- mmH₂O
Additional units can be provided according to customer requirements. EP-G25k-D Very Low Pressure Dea…
This flexibility makes the system easier to integrate into existing calibration procedures without requiring unnecessary unit conversions during operation.
Compact and Practical Laboratory Design
Despite its high precision low pressure capabilities, the EP-G25k remains relatively compact.
The calibrator measures:
390 × 310 × 240 mm
and weighs:
13.5 kg
A separate storage case is provided for pistons, accessories and weights. It measures:
390 × 310 × 147 mm
and weighs:
5.3 kg. EP-G25k-D Very Low Pressure Dea…
The product photographs on pages 1 and 2 of the supplied datasheet show the compact benchtop calibrator with front-mounted pressure controls and a separate protective case containing the weights and accessories.
This arrangement allows the precision components to be stored safely when the system is not in use.
Low Pressure Calibration and Measurement Uncertainty
Very low pressure calibration places special demands on measurement uncertainty evaluation.
At pressures of only a few pascals, influence quantities that may be negligible at higher pressures can become significant.
Important factors can include:
- Pressure stability
- Zero point stability
- Environmental conditions
- Atmospheric pressure
- Temperature
- Reference pressure uncertainty
- Pneumatic connections
- Leakage
- Device under test resolution
- Repeatability
The EP-G25k addresses the very low end of its measurement range by specifying a fixed absolute error below 0.4 kPa rather than relying solely on a percentage of reading.
This provides a more meaningful performance specification at very low pressures.
europascal EP-G25k Calibration and Service
Reliable low pressure measurement requires regular calibration and documented metrological traceability.
europascal operates a calibration laboratory accredited according to DIN EN ISO/IEC 17025. The supplied EP-G25k documentation identifies the laboratory accreditation number as D-K-15055-01-00, with accreditation applying to the quantities included in the accreditation scope. EP-G25k-D Very Low Pressure Dea…
Discover our professional europascal calibration service for reliable and traceable calibration of your pressure measurement equipment.
europascal can support customers not only with calibration but also with selecting suitable pressure standards and configuring calibration solutions for specific low pressure applications.
Why Choose the europascal EP-G25k?
The europascal EP-G25k Precise Low Pressure Deadweight Tester provides a specialized solution for high accuracy pneumatic pressure generation at very low pressures.
Its gauge pressure capability from 0.2 to 250 mbar and differential pressure capability beginning at only 5 Pa make it particularly suitable for sensitive low pressure measurement equipment.
Accuracy of up to ±0.015 % of reading, fast stabilization in less than 10 seconds and flexible pneumatic operation with air or nitrogen provide the performance required for professional calibration environments.
The system is particularly attractive for laboratories working with differential pressure transmitters, low pressure gauges, sensitive pressure sensors and other measurement instruments operating close to atmospheric pressure.
Looking for the europascal EP-G25k or a professional low pressure calibration solution? Contact europascal today for expert advice, product availability, pricing, configuration and calibration options tailored to your requirements.
Discover our professional europascal calibration service for reliable and traceable calibration of low pressure measurement equipment.
