Siphon Protects Pressure Instruments

March 21, 2018
Ashcroft's microtube has a maximum process temperature of 800°F.

Keeping your pressure instrument safe from high temperature processes, the 2198 MicroTube Siphon is capable of containing pressure up to 5,000 psi, and can reduce temperatures from as high as 800°F (427°C), depending on the pressure input. 316L stainless steel construction and a variety of process connections ensure compatibility with a wide variety of installation requirements. The unique low volume design allows the 2198 to be used between an instrument and a diaphragm seal.

  • Process & Instrument Connections: 1/4, 1/2 NPT and BSP
  • Material: 316L SS
  • Maximum allowable working pressure: 5,000 psi
  • Maximum process temperature: 800°F (427°C)



  • Effectively protects instruments from elevated temperatures
  • Siphon and sensing instrument mount directly to the process
  • 316L SS compatible with many process media
  • Used with gauges, switches, transducers and diaphragm seals