Starting at $589.31
  • Usually ships in 3-5 weeks



  • Vacuum to 10,000 psi ranges
  • ±1.0% (1259, 1279) or ±1.5% (T6500) of span accuracy
  • 1/2in NPT connection size
  • Solid front with pressure relief back case
  • Micrometer adjustable pointer
  • Hermetically sealed: IP66
  • 510 threaded, DF flanged diaphragm seal
  • Shatterproof glass, acrylic window


The Ashcroft acid leak detection (ALD) assembly provides multiple layers of safety when dealing with acid media. The ALD product combines a pressure gauge and a diaphragm seal into a single assembly, welded together at the socket. The assembly is gauge welded to seal standard. The diaphragm seal, gauge socket, and portions of the gauge case are coated with a yellow, acid-detection material that turns red when exposed to leaking acid with a pH ≤ 3.0. The lower portion of the gauge is also coated with ALD to indicate any leakage in the bourdon tape or welded joints of the gauge system.

Ashcroft Acid Leak Detection (ALD) Assembly Applications

  • Refineries, hydrofluoric acid
  • Chemical and petrochemical plants
  • Offshore oil rigs
  • Water and wastewater pressure control
  • Pulp and paper
  • Mining and metals