- Total measurement uncertainty starting from 0.015 ... 0.006 % of reading
- Four different piston-cylinder systems available for ranges ±1 bar, 0.1 ... 7 bar, 0.2 ... 25 bar, 1 ... 70 bar and 1 ... 120 bar, or also for ranges in lb/in² and kPa
- Stable aluminium base with a strong impact-resistant ABS cover for heavy industrial use combined with compact dimensions and light weight
- Interchangeable pistons and mass sets for each model, mass sets manufactured from stainless steel
- Factory calibration includes traceability to national standards, as standard; with UKAS calibration possible as an option
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- Total measurement uncertainty up to 0.025 % of reading
- Upgradeable using CPS5800/CPM5800 to provide increased accuracy to 0.006 %
- Direct replacement of original DH-Budenberg 580 series
- Factory calibration included as standard, traceable to national standards, with UKAS calibration possible as an option
- Masses manufactured from stainless steel, can be adjusted to local gravity
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- Total measurement uncertainty up to 0.01 % of reading
- Dual-range piston-cylinder system 2,600 bar (40,000 lb/in²) with fully automated changing between ranges
- Factory calibration includes traceability to national standards, as standard, with UKAS calibration possible as an option
- Masses manufactured from stainless steel, can be adjusted to local gravity
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- Total measurement uncertainty to 0.008 % of reading
- Factory calibration included as standard, traceable to national standards; with DKD/DAkkS calibration possible as an option
- High long-term stability with recommended recalibration interval every five years
- Masses manufactured from stainless steel and aluminium, can be adjusted to local gravity
- Quick and safe replacement of the piston-cylinder system for measuring range changes via patented ConTect quickrelease system as an option
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Bedienungsanleitung
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- Total measurement uncertainty to 0.02 % of reading
- Factory calibration includes traceability to national standards, as standard; with DKD/DAkkS calibration possible as an option
- High long-term stability with recommended recalibration cycle every five years
- Masses manufactured from stainless steel and aluminium, can be adjusted to local gravity
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- Measuring ranges (= static pressure + differential pressure) up to 400 bar (5,000 psi) pneumatic, up to 1,600 bar (23,200 psi) hydraulic
- Total measurement uncertainty to 0.008 % of differential pressure plus 0.0001 % (1 ppm) of static pressure
- Factory calibration included as standard, traceable to national standards; with DKD/DAkkS calibration possible as an option
- High long-term stability with recommended recalibration interval every five years
- Masses manufactured from stainless steel and aluminium, can be adjusted to local gravity
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Special Features
- Total measurement uncertainty to 0.006 % of reading
- Extremely flexible instrument with a wide range of single and dual-range piston-cylinder systems
- Dual-range piston-cylinder systems with fully automated changing between ranges
- Factory calibration includes traceability to national standards, as standard, with UKAS calibration possible as an option
- Fast and safe replacement of the piston-cylinder system via patented ConTect quick-release system as an option
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- Total measurement uncertainty to 0.002 % of reading, depending on model
- COFRAC calibration certificate included as standard
- Available up to 1,000 bar (14,500 psi) pneumatic and 5,000 bar (72,500 psi) hydraulic
- 15 different piston-cylinder sizes available
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- Measuring range (= static pressure + differential pressure) up to 800 bar / 11,600 psi pneumatic
- Total measurement uncertainty to 0.008 % of differential pressure plus 0.0001 % (1 ppm) of static pressure
- COFRAC calibration certificate included as standard
- High long-term stability with recommended recalibration cycle every five years
- DP from 10 Pa up to 800 bar / 0.04 inH2O up to 11,600 psi with static pressure effects down to 1 ppm
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- Total measurement uncertainty down to 20 ppm of reading
- Available up to 1,000 bar / 14,500 psi pneumatic and 5,000 bar / 72,500 psi hydraulic
- Automatic mass loading system with a resolution down to 0.1 g
- Automatic pressure generation
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- Measuring range up to 500 bar (7,250 psi)
- Accuracy to 35 ppm of reading
- Absolute and gauge pressure measurement
- No loading of masses required
- Intuitive touchscreen based user interface
- Two year warranty
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- Two fine metering valves for pressure inlet and pressure outlet or vacuum
- Precisely adjustable volume adjuster for fine adjustment of pressure
- Proven technology of the dead-weight tester CPB3500
- Connection for external pressure or vacuum source
- Pressure gauge for indicating the approximate pressure
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- Ranges: from 30 ... 600 bar / 500 ... 8,000 psi (model 80) and from 7 ... 120 bar / 100 ... 1,600 psi (model 80L)
- Accuracy: 0.03 % + 0.05 bar (model 80) and 0.04 % + 0.015 bar (model 80L)
- Ergonomic layout ideal for field use
- All instruments supplied with certification traceable to national standards
- UKAS certificate is available through our pressure standards laboratory as an optional extra
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- Patent applied for, among others DE Patent No. 102013215351
- New calibration concept simplifies certificate generation
- Easy operation and set up
- Acquisition and automatic correction of all critical influencing factors, to increase the accuracy of the measurement
- Can also be used with other calibration instruments and WIKA-Cal software
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Piston Gauges (Deadweight Testers) – Primary Standard for Pressure Calibration
Piston gauges—also called deadweight testers—are primary pressure standards. Pressure is derived directly from force (mass × g) over the effective piston area, achieving highest accuracies down to ±0.005…0.02 % (model dependent). They are the reference for calibrating pressure gauges, transmitters, and switches in the lab.
ICS Schneider Messtechnik supplies pneumatic and hydraulic piston gauges, weight sets (optionally buoyancy/gravity corrected), piston-cylinder units, media, plus DAkkS/ISO calibrations and training.
FAQ on Piston Gauges (Deadweight Testers)
Answers on operating principle, selection, media, uncertainty, corrections, accessories, and lab best practices.
How does a piston gauge work?
Weights apply a defined force to the piston. Dividing by the effective piston area yields pressure. Gentle rotation/float minimizes friction and produces a stable reference pressure.
Pneumatic or hydraulic—what should I choose?
| Criterion | Pneumatic (air/N₂) | Hydraulic (oil/water) |
|---|---|---|
| Typical range | mbar to ~2 MPa (20 bar) | up to 250/700/1,000+ bar |
| Cleanliness | Very clean, no media carryover | Media contact possible |
| Fine resolution | Excellent at low pressure | Excellent at high pressure |
| Use | Lab, mbar–bar | Lab/production, high pressure |
What accuracy can be achieved?
Depending on piston-cylinder class and weight certification typically ±0.005…0.02 % of generated pressure. Overall uncertainty is influenced by area & mass calibration, buoyancy, gravity, and temperature.
Which corrections matter (buoyancy/gravity)?
- Air buoyancy: correct effective mass based on air density.
- Local gravity g: site-dependent; weight sets can be adjusted to local g.
- Piston area: apply temperature/pressure coefficients of effective area.
How do I set the float condition?
Load weights, start the piston gently to rotate/float, then use fine control to keep the piston in the center float zone. Read only in stable float.
Which media are permitted?
| Medium | Advantage | Note |
|---|---|---|
| Dry air/N₂ | Clean, no contamination | Drying/filtration required |
| Hydraulic oil | Very stable generation | Check material compatibility |
| Water/glycol | Clean processes | Corrosion protection & venting |
How do I size the range?
Match to DUTs. Target the desired points with mid-stack weights and ensure fine weight steps for optimal uncertainty.
Does piston rotation speed matter?
Light rotation reduces friction and improves stability; too high may induce turbulence—keep it moderate.
How is a deadweight tester calibrated?
Via DAkkS/ISO calibration of the piston area and weights (traceable). Certificates include correction values and uncertainties for calculation.
Do I need ambient & temperature measurement?
Yes. Air density (for buoyancy), temperature (area/media), and optionally pressure/humidity are required to achieve low uncertainty.
How do I calculate generated pressure?
Simplified: p = (Σ masses × g) / A. In practice include buoyancy, gravity, temperature, and area corrections. Many systems offer software for automatic correction.
What safety aspects apply?
- Handle weights safely; avoid pinch points.
- Use only approved media; prevent leaks.
- Secure high-pressure lines; never disconnect under pressure.
Which accessories are useful?
- Additional weights (fine steps, local g correction)
- Adapters/manifolds (G/NPT, quick change)
- Temperature/ambient sensors, leveling base, turntable
- Software for correction and documentation
Do you offer service & training?
Yes. We support selection, setup, calibration routines, uncertainty budgets, and provide DAkkS/ISO calibrations including documentation templates.