Ashcroft
Ashcroft 451082 Pressure Gauge 0 to 30 psi 4 1/2 in 1/4 in
Measures hydraulic pressure from 0 to 30 psi with ±0.25 % accuracy and 0.1 psi graduations in a black epoxy-coated aluminum case
- Accurate readings within ±0.25% full scale
- Clear 0.1 psi graduations for fine adjustment
- Epoxy-coated aluminium case resists corrosion
- ¼ in MNPT bottom connection fits standard ports
- NIST-traceable calibration certificate included with data
Ashcroft 451082 Pressure Gauge
The Ashcroft 451082 is a 4 1/2 inch hydraulic test gauge built for technicians and engineers who need accurate pressure monitoring in fluid power systems. Its epoxy coated aluminum case and brass/bronze wetted parts suit industrial environments where durability matters. The gauge reads from 0 to 30 psi with a smallest graduation of .1 psi and includes a NIST calibration certificate with data for traceable verification.
Installation notes
The gauge connects via a 1/4 in MNPT bottom mount fitting, so thread sealant or tape must be applied carefully to prevent leaks at the connection. Because it is not panel mountable, the unit installs directly into a port or tee without additional brackets. The case is not liquid filled, so vibration damping relies on the mounting rigidity rather than internal fluid. Ensure the system pressure never exceeds the 30 psi upper limit to avoid permanent damage to the bourdon tube.
Sustained load behaviour
Accuracy is rated at +/- .25 percent of span across the full range, and this tolerance holds during continuous operation rather than only in brief tests. The black epoxy coated aluminum case resists corrosion from ambient moisture and chemical splash over long service periods. Without liquid filling, the pointer responds instantly to pressure changes but may flutter under severe pulsation; a snubber can be added upstream if the application demands steadier readings.
Highlights
- Accurate readings within ±0.25% full scale
- Clear 0.1 psi graduations for fine adjustment
- Epoxy-coated aluminium case resists corrosion
- ¼ in MNPT bottom connection fits standard ports
- NIST-traceable calibration certificate included with data
Specifications
| Brand | ASHCROFT |
|---|
Questions about this item
How do I confirm the gauge is reading within its stated accuracy after installation?
Compare the needle to a known reference pressure; the gauge is calibrated to ±0.25 percent of span and the dial shows 0.1 psi graduations for fine verification.
What does the package include and what fittings must I supply?
The box contains the Ashcroft 451082 gauge with a 1/4 in MNPT bottom connection; you must provide any adapters, tubing or sealant required for your specific hydraulic circuit.
Which version of this gauge should I select for a 0 to 30 psi hydraulic system?
The 451082 model covers exactly 0 to 30 psi with a 4 1/2 in black epoxy-coated aluminum case, brass/bronze wetted parts and a NIST-traceable calibration certificate included.
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