All specifications are subject to change without notice.

All sales subject to standard terms and conditions.

©2022 Ashcroft Inc. ald2_gauges_ds_RevF_03-23-22

ashcroft.com

info@ashcroft.com

1.800.385-0635

1

Data Sheet

FEATURES

Acid sensing component (yellow in photo turns

red

when exposed to acid with a pH ≤3.0)

Available with pressure ranges to 10,000 psi

Gauge welded to seal (STD.)

Available with Halocarbon® fill for oxidizing acids

Orange or yellow gauge case for indentification (OPT.)

Available with Silicone-free

PLUS!™ Performance

Custom dials available

1279 Pressure Gauge

With 510 Seal Assembly

KEY BENEFITS

• Tamper proof design, gauge welded to seal

• Visual indication of leaking process media

• Dual containment for safety

SPECIFICATIONS

Accuracy:

1259, 1279: ±1.0% of span

T6500: ±1.5% of span

Dial Sizes:

1259, 1279: 41/2˝

T6500: 100mm

Process Connection:

1

⁄2 NPT

Case Style:

Solid front with pressure relief back

Pointer:

Micrometer, adjustable, aluminum

Weather Protection:

Hermetically sealed: IP66

Diaphragm Seal Type:

510 Threaded or DF Flanged

Window Material:

1259: Safety glass (STD.) acrylic (OPT.)

1279: Safety glass (STD.), non-glare glass (OPT.)

or acrylic (OPT.)

T6500: Safety glass or polycarbonate (OPT.)

Tamper Proof Design:

Diaphragm seal welded to gauge socket

Pressure Rating (MAWP): Vac. to 1,500 psi @ 100°F

1,500 to 10,000 psi @ 100°F (OPT.)

NON-WETTED COMPONENTS

Models

Case

Ring

Back Cover

1259

PBT

PBT

PBT

1279

Phenolic

Polycarbonate

Polycarbonate

T6500

304 SS

304 SS

304 SS

WETTED COMPONENTS

Models

Diaphragm

Lower Housing

510

316L SS, Hastelloy® C-276 or Monel®

316 SS, Hastelloy® C-276

or Monel®

DF Flanged

316L SS, Hastelloy® C-276, Monel®

or Tantalum

N/A

NON-WETTED COMPONENTS

Models

Top Housing

Flange

510

316L Stainless steel, Monel®

—

DF Flanged

316L Stainless steel, Monel®

316L Stainless steel, Monel®

Consult material selector/corrosion guide at www.ashcroft.com for acid compatibility

ALD for gauge

ALD for gauge socket

to seal weld

ALD for top to lower

housing weld

1279

Pressure Gauge

With Flanged DF Seal Assembly

1259

Pressure Gauge

With 510 Seal Assembly

Acid Leak Detection (ALD) Assembly