About AMETEK U.S. Gauge
AMETEK U.S. Gauge Pressure & Temperature SolutionsAMETEK
U.S. Gauge, now a division of AMETEK Sensors, Test & Calibration (STC), has been a world leader in pressure, temperature, and electrical measurement for over 100 years. The company manufactures Bourdon tube and diaphragm capsule gauges in sizes from 1.5" to 6", with brass, stainless steel (316), or Monel internals engineered for reliability in oil/gas refining, power generation, chemical processing, and marine applications.
The Model 656 industrial pressure gauge is engineered for environments with excessive vibration and pulsation typical of pump discharge lines and compressor outlets, while maintaining accuracy ±1.6% or ±1% full scale depending on size. These gauges are approved for use in corrosive petrochemical, refining, and food/pharmaceutical plants per ASME B40.1 standards and include stainless wetted parts for extended service life.
U.S. Gauge diaphragm seals and thermowell fittings isolate volatile, viscous, or high-temperature fluids from gauge internals, extending calibration intervals and preventing fouling in harsh process environments. Ranges span 30" HgVac to 150 PSI compound gauges, up to 23,000 PSI capacity across different series, meeting requirements from subsea depths to critical pressure vessels.
ISO 9001:2015 certification and 50+ years as an ASME/API approved manufacturer ensure traceability and regulatory compliance for every gauge. AMETEK U.S. Gauge calibration services and replacement parts maintain accuracy across instrument lifecycles in demanding industrial sectors.
ChatMRO ingests U.S. Gauge pressure range, size, material grade, and connection type to surface exact catalog matches, diaphragm seal compatibility, and field-proven alternatives from allied suppliers. Engineers and technicians source critical process instrumentation without manual data sheet searches.
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Specify your process range, gauge size, material grade (brass/316SS/Monel), and connection — we'll confirm availability and pressure-rated alternates.
Frequently asked questions
When do I need a diaphragm seal with my U.S. Gauge pressure gauge?
Diaphragm seals are essential when your process fluid is corrosive (acid/caustic), viscous (oils/slurries), prone to fouling (food/pharmaceutical), or extremely hot (>300°F); they isolate the gauge mechanism from direct fluid contact, preventing capsule damage, clogging, and calibration drift. U.S. Gauge diaphragm seals maintain gauge accuracy for 2–3 times longer in harsh service and are standard on refinery, petrochemical, and power plant installations.
What's the difference between brass and stainless steel internals in U.S. Gauge gauges?
Brass internals (standard) offer cost-effective performance in neutral process conditions (water, air, mild hydrocarbons), while 316 stainless steel internals resist chlorides, acids, seawater, and caustics, required by API/NACE standards in marine, desalination, and chemical plants. Monel internals (premium) add extreme corrosion resistance for sulfidic and halogenated environments; choose based on your process fluid composition and ambient salt/humidity exposure.
How accurate are AMETEK U.S. Gauge Model 656 gauges in pulsating pressure environments?
Model 656 gauges achieve ±1.6–±1% accuracy even with pressure ripple from pump discharge or compressor cycling, thanks to heavy damping in the Bourdon tube and internal snubbing; they're specifically approved for vibration/pulsation service per ASME B40.100. In typical refinery/gas compression duty, they maintain calibration for 3–5 years without re-zeroing, compared to 1–2 years for standard gauges in the same service.
What's the connection type and size I need for my pipeline or vessel?
U.S. Gauge supplies 1/4", 1/2", and other NPT or SAE connections on gauge snubbers and diaphragm seal manifolds; confirm your process line thread pitch, port location (top/side/bottom of vessel), and whether you need a snubbing valve to protect the gauge during startup. ChatMRO's technical team cross-references your vessel/line spec to recommend the correct adaptor kit.
Do AMETEK U.S. Gauge gauges meet API, ASME, or industry-specific certifications for my application?
Yes — all U.S. Gauge gauges are manufactured per ASME B40.1 standards and carry API 570 (Inspection Code for In-Service Piping) and API 579 (Fitness-for-Service) approvals for critical service. Many models are approved by PED (EU Pressure Equipment Directive) and ATEX for hazardous areas; ChatMRO's database flags applicable certifications based on your industry (power, refining, pharma, marine) and confirms regulatory compliance before shipment.