Ashcroft
Ashcroft 451082 Vacuum Gauge 30 Hg 4 1/2 in 1/4 in
Measures vacuum from 30 Hg to 0 with ±0.25% accuracy in a 4 1/2 in epoxy-coated aluminum case
- 30 inHg vacuum range covers deep-evacuation work
- ±0.25 % full-scale accuracy with NIST-traceable calibration data
- 4 1/2 in epoxy-coated aluminium case resists corrosion
- 1/4 in MNPT bottom connection for direct plumbing
- Brass/bronze wetted parts suit hydraulic and pneumatic fluids
Ashcroft 451082 Vacuum Gauge 30 Hg
This vacuum gauge measures negative pressure from 30 inches of mercury to zero. It suits technicians who need a panel-mounted instrument for hydraulic or pneumatic test rigs. The black epoxy-coated aluminium case resists corrosion in workshop environments. A NIST-traceable calibration certificate with data is included.
Installation uses a 1/4 inch MNPT bottom connection
Thread the gauge into a matching female port using appropriate sealant for a leak-free seal. The bottom-mounted connection orientation may limit access in tight panels. No liquid filling means there is no risk of fluid leakage during handling. Verify the 0.5 inch Hg graduation meets your resolution needs before fitting.
Accuracy is ±0.25 percent of full scale
This tolerance determines whether the gauge meets your test specification. The primary range graduates in 0.5 inch Hg increments for reading precision. Wetted parts are brass and bronze, compatible with standard hydraulic fluids. The gauge is not panel-mountable, so bracket or flange mounting must be arranged separately.
Highlights
- 30 inHg vacuum range covers deep-evacuation work
- ±0.25 % full-scale accuracy with NIST-traceable calibration data
- 4 1/2 in epoxy-coated aluminium case resists corrosion
- 1/4 in MNPT bottom connection for direct plumbing
- Brass/bronze wetted parts suit hydraulic and pneumatic fluids
Specifications
| Brand | ASHCROFT |
|---|
Questions about this item
How do I verify the gauge reads correctly after installing it?
Apply a known vacuum source and confirm the pointer shows -30 to 0 in Hg within the stated ±0.25 percent accuracy; the NIST calibration certificate with data is included for traceable verification.
What comes in the box and what must I supply myself?
The gauge itself ships with its epoxy-coated aluminium case, brass/bronze wetted parts, 1/4 in MNPT bottom connection and calibration certificate; you must provide the 1/4 in NPT fitting, tubing and any panel-mount hardware as panel mounting is not supported.
Which scale and connection should I select for my application?
Choose the -30 to 0 in Hg range with 0.5 in Hg graduations and 1/4 in MNPT bottom connection when you need a vacuum test gauge in a 4 1/2 in aluminium case; no other ranges or connection types are offered for this model.
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