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- Instrument type: Hydraulic deadweight tester (primary pressure standard)
- Measurement principle: Pressure generated from P = F/A (force divided by piston area)
- Pressure generation: Manual hand pump with fine pressure adjustment
- Pressure standard: Primary standard with SI traceability
- Piston: Precision lapped tungsten carbide or hardened alloy piston-cylinder assembly (configuration dependent)
- Masses: Calibrated stainless-steel or alloy weight set
- Applications: Calibration of pressure gauges, transmitters, pressure sensors, pressure switches, and reference standards
- Traceability: National metrology institute (NMI) or ISO/IEC 17025 calibration available
- Pressure range: Configurable; commonly 0–400 bar, with other piston-cylinder options available
- Measurement uncertainty As low as: 20 ppm (0.002%) for suitable piston-cylinder systems and calibration
- Resolution: Determined by the smallest calibration mass increment
- Long-term stability: Excellent, owing to the mechanical pressure-balance principle
- Operating mode: Floating piston with rotating mass carrier to minimize friction
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