Marquest Scientific
Marquest Scientific
2950 Airway Avenue, Bldg. C-5
Costa Mesa, CA 92626
Phone: 714.491.9191
Fax: 714.491.9199
Email: info@marquestscientific.com
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Series TG TUFF GUARD™ Gauge Isolators, (Also known as Gauge Guards, Diaphragm Seals)
PVC, CPVC, & PP, & PVDF Gauge Guards w/ Wika 213.53 2.5" Dia. Stainless Case - Brass Internals, Glycerin Filled Gauge Case
Assembly Internals Aqueous Glycerin Filled. Silicone Oil, Mineral Oil, Ethylene Glycol, or Halocarbon Fills available. Please contact us for ordering info.
  • Gauge Installed is U.S. Made Wika 213.53 Glycerin Filled, Stainless Case, Brass Internals. Accuracy is +-2.5% of span
  • Modified PTFE Diaphragm Standard, Viton or EPDM Available
  • Diaphragm is Convoluted for Accurate Pressure Transmission, Lower Spring Rate.
  • Stainless steel reinforced instrument connection. Integrally molded. "Unbreakable!"
  • Reinforced process connection with compressive spoke ribs to transfer the tensile stress into compression.
  • Wall thickness meet or exceed ANSI Schedule 120.
  • Sufficient displacement to handle the required volumetric displacement of all instrument sizes and pressure ranges.
  • Self Venting Internal Shape for "Easy Filling"
  • Fill/Bleed port provision, reinforced through upper chamber to allow for threaded connections in vacuum fill processing.
  • Integral wrench provisions for field service and maintenance. Diaphragm is Replaceable.
  • Low Profile Design eliminates Dead Volume
  • 3 year limited warranty


PLEASE CLICK ITEM # BELOW TO VIEW ADDITIONAL SPECIFICATIONS & DOWNLOADS!

Product Image
Unit of Measure
Items TG-25SB-PVC
TG-22T030SB-PVC
1/4" Inlet Female NPT Connection, PVC Body, PTFE Diaphragm, 0-30 PSI Wika Stainless Brass 2.5" Gauge
List Price $196.95
 TG-25SB-PVC
TG-22T060SB-PVC
1/4" Inlet Female NPT Connection, PVC Body, PTFE Diaphragm, 0-60 PSI Wika Stainless Brass 2.5" Gauge
List Price $196.95
 TG-25SB-PVC
TG-22T100SB-PVC
1/4" Inlet Female NPT Connection, PVC Body, PTFE Diaphragm, 0-100 PSI Wika Stainless Brass 2.5" Gauge
List Price $196.95
 TG-25SB-PVC
TG-22T160SB-PVC
1/4" Inlet Female NPT Connection, PVC Body, PTFE Diaphragm, 0-160 PSI Wika Stainless Brass 2.5" Gauge
List Price $196.95
 TG-25SB-PVC
TG-22T200SB-PVC
1/4" Inlet Female NPT Connection, PVC Body, PTFE Diaphragm, 0-200 PSI Wika Stainless Brass 2.5" Gauge
List Price $196.95
Inlet Connection N/A 1/4" Female NPT
Materials N/A PVC, PTFE Diaphragm
Installed Gauge N/A 0-30 PSI, SS, Brass N/A 0-60 PSI, SS, Brass N/A 0-100 PSI, SS, Brass N/A 0-160 PSI, SS, Brass N/A 0-200 PSI, SS, Brass
Scope N/A
  • The Marquest Gauge Isolator provides two fluid chambers separated by an impermeable membrane. The upper chamber (instrument side) is normally filled with a stabilized liquid. The lower chamber receives the media under pressure.
  • Most pressure sensing devices are compatible with 1/4" FNPT outlet. The inlet is standard 1/2" FNPT or 1/4" FNPT.
  • Chemical resistance and purity levels are as recommended for the base materials.
  • No metals or lubricants are used in construction, internally or externally.
  • Custom membranes may be supplied upon request.
 		N/A
  • The Marquest Gauge Isolator provides two fluid chambers separated by an impermeable membrane. The upper chamber (instrument side) is normally filled with a stabilized liquid. The lower chamber receives the media under pressure.
  • Most pressure sensing devices are compatible with 1/4" FNPT outlet. The inlet is standard 1/2" FNPT or 1/4" FNPT.
  • Chemical resistance and purity levels are as recommended for the base materials.
  • No lubricants are used in construction, internally or externally.
  • Custom membranes may be supplied upon request.
 		N/A
  • The Marquest Gauge Isolator provides two fluid chambers separated by an impermeable membrane. The upper chamber (instrument side) is normally filled with a stabilized liquid. The lower chamber receives the media under pressure.
  • Most pressure sensing devices are compatible with 1/4" FNPT outlet. The inlet is standard 1/2" FNPT or 1/4" FNPT.
  • Chemical resistance and purity levels are as recommended for the base materials.
  • No metals or lubricants are used in construction, internally or externally.
  • Custom membranes may be supplied upon request.
 		N/A
  • The Marquest Gauge Isolator provides two fluid chambers separated by an impermeable membrane. The upper chamber (instrument side) is normally filled with a stabilized liquid. The lower chamber receives the media under pressure.
  • Most pressure sensing devices are compatible with 1/4" FNPT outlet. The inlet is standard 1/2" FNPT or 1/4" FNPT.
  • Chemical resistance and purity levels are as recommended for the base materials.
  • No metals or lubricants are used in construction, internally or externally.
  • Custom membranes may be supplied upon request.
 		N/A
  • The Marquest Gauge Isolator provides two fluid chambers separated by an impermeable membrane. The upper chamber (instrument side) is normally filled with a stabilized liquid. The lower chamber receives the media under pressure.
  • Most pressure sensing devices are compatible with 1/4" FNPT outlet. The inlet is standard 1/2" FNPT or 1/4" FNPT.
  • Chemical resistance and purity levels are as recommended for the base materials.
  • No metals or lubricants are used in construction, internally or externally.
  • Custom membranes may be supplied upon request.
Materials of Construction N/A

Body:

  • PVC: Polyvinyl Chloride
  • CPVC: Chlorinated Polyvinyl Chloride
  • PP: Polypropylene homopolymer, glass & mineral reinforced

Membrane:

  • Standard: PTFE, also available in:
  • FPM: Viton®, Fluorine elastomer
  • EPDM: Ethylene Propylene elastomer
Features N/A
  • Protects and isolates pressure sensing instruments
  • Total isolation from system media
  • Low profile design eliminates dead volume
  • Convoluted diaphragm allows accurate transmission of system pressure
  • Optimum pressure containment spherical design
  • Low in original cost and maintenance
  • Simple installation