FEATURES

±0.1% of span accuracy (ASME B 40.100 Grade 4A)

Ranges from vacuum to 100,000 psi, gauge, absolute

and compound pressure

Mirror band dial and knife edge pointer to eliminate

parallax error

Solid front protective case

External zero adjustment

KEY BENEFITS

• High accuracy for precision pressure

measurement

•Many process connection options

•Dual engineering unit scale optional

of 4

1

FEATURES

Mirror-band dial and knife-edge pointer to eliminate

parallax error

Ranges from Vacuum to 100,000 psi, gauge, absolute

and compound pressure

Solid-front protective case

Temperature-compensated movement significantly

reduces temperature error

TYPICAL USES

Test Laboratories

Precision Test and Measurement Validation

Calibration Laboratories

All specifications are subject to change without notice.

All sales subject to standard terms and conditions.

©2018 Ashcroft Inc. Ash_Bul_A4A_pressure_ds, Rev. A, 02/18

ashcroft.com

info@ashcroft.com

1.800.328.8258

Data Sheet

A4A Precision Pressure Gauge

SPECIFICATIONS

Accuracy:

±0.1% of span (ASME B40.100 Grade 4A)

(includes NIST Traceable Calibration Certification)

Sizes:

6˝, 8½˝, 12˝, 16˝

Ranges:

Vacuum, Compound to 10,000 psi (absolute

pressure available)

Process Connection

Size:

¼ NPT Female bottom

1

⁄8 NPT Male or Female – back or bottom

¼ NPT Male or Female – back or bottom

9

⁄16-18 UNF-2B Female for ¼ HP tubing

MS33649-4 Female only – back or bottom

MS33656-4 Male only – back or bottom

MS-16142 Female only – back or bottom

Mil-G-18997D Male only – back or bottom

Pointer Travel:

350°: up to 30,000 psi

300°: 40,000 to 50,000 psi

270°: 60,000 thru 100,000 psi

Dial:

Zero adjustable aluminum, white background, black

numerals with polished mirror band

Repeatability:

±0.02% of span

Hysteresis:

<0.1% of span

Sensitivity:

0.01% of span

WETTED COMPONENTS

Bourdon Tube

Process Connection

0/15 psi through 0/40 psi: Beryllium copper

0/50 psi through 0/100,000 psi: 403 SS

303 SS

NON-WETTED COMPONENTS

Case Material

Enclosure Rating

Cast aluminum, solid front, blow out

rear cover; Integral panel mounting

flange

Case is not sealed, recommended for

weather protected environment only

OPTIONAL FEATURES

Temperature

Compensation:

-25°F to 125°F

Peak Load Indicator:

6”, 8 ½”, 12”, 16”

Wall Mount:

6”, 8 ½”, 12”, 16”

Consult Factory For:

Special cleaning for Oxygen Services, Special

scale and Calibration options, Slotted Link

options, and Dual Scale opttions

A4A

6˝, 8½˝, 12˝, 16˝ dial sizes

KEY BENEFITS

• Epozy-coated system for corrosion resistance

• Rugged SS construction

• Integral span adjustment

• Compact design

A4A

6˝, 8½˝, 12˝ or 16˝ dial sizes

SPECIFICATIONS

Accuracy:

±0.1% of span (ASME B40.100 Grade 4A)

Includes NIST Traceable Calibration Certification

Hysteresis:

<0.1% of span

Hysteresis may exceed ±0.1% of span for ranges

equal to greater than 75,000 psi

(±0.3% typical not to exceed ±0.4% of span)

Case Size:

6˝, 8½˝, 12˝ or 16˝

Enclosure Rating:

Case is not sealed, recommended for weather

protected environment only

Process Connection

Size:

¼ NPT Female

1

⁄8 NPT Male or female

¼ NPT Male or female

9

⁄16˝-18 UNF-2B Female for ¼˝ HP tubing

MS33649-4 Female only

MS33656-4 Male only

MS-16142 Female only

Mil-G-18997D Male only

• Standard Inlet Fittings: ¼ NPT Female back connection for

ranges up to and including 10,000 psi.

• Ranges greater than 10,000 psi 9⁄16 -18 UNF Female

compatible with AND10050-4, Aminco 45-11310 and

Autoclave F-250-C.

Process Connection

Location:

Back, bottom

Case Style:

Solid front, blow out rear cover, with intregal panel

mounting flange

Mounting Options:

Intregal panel mount or optional wall mount bracket

Pointer Travel:

350 Degrees up to 30,000 psi

300 Degrees 40,000 to 50,000 psi

270 Degrees 60,000 thru 100,000 psi

Options:

Thermal compensation from –25°F to +125°F

NON-WETTED COMPONENTS

Model

Case Material

Cast Aluminum

A4A

Enclosure Rating

Case is not sealed,

recommended for weather protected

environment only

OPTIONS

Thermal Compensation: Bimetalic compensator corrects effects of ambient tem-

perature on bourdon tube to maintain accuracybetween -25°F and +125°F

Slotted Link: Protects gauge movement from damage caused bysudden release of

pressure, such as burst testing applications

Peak Load Indicator: “Max Hand” red pointer which remains in position after

being pushed by the primary pointer. External knob allows for manual reset.

Peak Load Indicator: Special units of measure and dual scales can be customized

to meet customer requirements.

Curstom Scales : Special units of measure and dual scales can be customized to

meet customer requirements.

Hand Carry Case: Sturdy lightly paded case for storage and hand carry of gauge.

Not suitable for use as stand alone shipping container.

WETTED COMPONENTS

Model

Inlet Fitting

303SS

A4A

Bourdon Tube

Beryllium copper: 0/15 psi through 0/40 psi

403 SS: 0/50 psi through 0/100,000 psi

of 5

1

Data Sheet

A4A Precision Pressure Gauge

All specifications are subject to change without notice.

All sales subject to standard terms and conditions.

©2020 Ashcroft Inc. A4A_gauge_ds_RevE_08-17-20

ashcroft.com

info@ashcroft.com

1.800.328.8258