The Ashcroft 1305D is an affordable, portable primary pressure standard specifically designed for precise calibration of industrial service gauges and transducers. Accurate to 0.1% of reading, the 1305D is carefully calibrated and certified traceable to NIST .

This dual-range system provides "high" and "low" pressure piston assemblies with a complete set of weights labeled with corresponding pressure values. A 2-speed lever-action hydraulic pump achieves pressures up to 10,000 psi. A shuttle valve allows selection between two rates of pressure generation, reducing effort at higher pressures. A secondary micro-adjust vernier displacement valve enables fine-tuning of pressure output to specific calibration points .

The standard 1305D pump operates with SAE 20 weight petroleum-based oil. For glycol or phosphate ester-based fluids, the 1305DH version features special seals. All components are stored in a rugged metal tool box for protection and portability. NIST traceable calibration certificate included .

Key Features

• Accuracy: ±0.1% of reading (adjusted for standard gravity)
• Pressure range: 15 to 10,000 psi maximum
• Dual-range system with high and low pressure piston assemblies
• 2-speed lever-action pump with micro-adjust vernier valve
• Stainless steel piston and cylinder
• Non-magnetic die cast zinc weights
• Reservoir volume: 1.5 pints (0.7 liter)
• Complete with tools, adapters, and carrying case
• NIST traceability document provided

Applications

• Field calibration of industrial service gauges
• Laboratory calibration of transducers
• Test and measurement applications
• Calibration laboratories