Data Sheet Acid Leak Detection (ALD) Assembly 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 standard Available with Halocarbon® fill for oxidizing acids Optional orange or yellow gauge case for indentification Available with Silicone-free PLUS!™ Performance Custom dials available 1259 Pressure Gauge With 510 Seal Assembly SPECIFICATIONS Accuracy: ±1.0% of span (1259, 1279) or ±1.5% of span (T6500) 1 Process Connection Size: ⁄2 NPT Case Style: Solid front with pressure relief back Micrometer, adjustable, aluminum Weather Protection: Diaphragm Seal Type: Window Material: Shatterproof glass, acrylic (OPT.) Tamper Proof Design: Diaphragm seal welded to gauge socket With Flanged DF Seal Assembly Pressure Rating (MAWP): Vac. to 1,500 psi @ 100°F: (STD.) With 510 Seal Assembly WETTED COMPONENTS Diaphragm: Lower Housing: (510 only) 316L SS, Hastelloy® C-276, Monel® • Visual indication of leaking process media • Dual containment for safety NON-WETTED COMPONENTS Top Housing: KEY BENEFITS • Tamper proof design, gauge welded to seal Consult material selector/corrosion guide at www.ashcroft.com for acid compatibility All specifications are subject to change without notice. All sales subject to standard terms and conditions.

CASHCROFT Trust the shield.® Acid Leak Detection (ALD) Assembly ORDERING CODE Dial Size 45 - 41/2” Dial (available only with cases 1 and 2) 45 10 - 100mm Dial (available only with case 3) Case 1 - 1279 (available only with dial size 45) 2 - 1259 (available only with dial size 45) 3 - T6500 (available only with dial size 100mm) Bourdon Tube & Gauge Process Connection S - 316 SS P- Monel® Diaphram Seal and Material 1S (510) - 316L SS 1P (510) - Monel® (available only with (P-Monel®) lower housing) 1H (510) - Hastelloy® C-276 2S (DF) - 316L SS 2P (DF) - Monel® 2H (DF) - Hastelloy® C-276 2U (DF)...

CASHCROFT Trust the shield.® Acid Leak Detection (ALD) Assembly 1259, 1279 Pressure Ranges T6500 Pressure Ranges psi 30IMV 3 _ All specifications are subject to change without notice. All sales subject to standard terms and conditions. ©2018 Ashcroft Inc. ald2_ds1, 04/18

CASHCROFT Trust the shield.® Acid Leak Detection (ALD) Assembly DIMENSIONS in [ ] are millimeters 1259/510 Seal Assembly 1279/510 Seal Assembly All specifications are subject to change without notice. All sales subject to standard terms and conditions. ©2018 Ashcroft Inc. ald2_ds1, 04/18