Explore our high-precision OEM mechanical pressure gauges, electric contact indicators, and diaphragm seal assemblies engineered for extreme industrial environments.
Comprehensive technical whitepaper on material selection, mechanical strain mechanics, laser welding processes, and environmental resilience in process instrumentation.
Technical Insight: Standard brass or basic steel pressure gauges often fail under harsh process media conditions due to stress corrosion cracking (SCC), hydrogen embrittlement, and mechanical fatigue. Customized 316L stainless steel pressure instruments engineered by Huzhou Accuracy Instrument Co., Ltd. offer hermetically sealed TIG/Laser-welded Bourdon tube assemblies, superior overpressure safety (up to 400% F.S.), and extreme vibration dampening via food-grade liquid filling options (Glycerin/Silicone Oil).
Our custom OEM pressure gauges utilize heavy-duty AISI 316L stainless steel for wetted parts and Bourdon tubes. The inclusion of 2-3% Molybdenum increases resistance to chloride pitting, acidic media, and chemical degradation compared to standard AISI 304 steel.
Eliminating soft-solder or silver-brazed joints, our automated fiber laser welding process forms a continuous, homogeneous joint between the socket, Bourdon tube, and process connection. This guarantees absolute zero-leak containment under high thermal cycles.
Engineered for IP65, IP67, and explosion-proof environments. Features safety solid-front designs with blow-out backs (according to ASME B40.100 safety standards) to safely vent pressure in cases of sudden overpressure blowout.
| Parameter | Standard Industrial Specification | Customized OEM High-Performance Option |
|---|---|---|
| Dial Sizes | 40mm, 50mm, 63mm, 100mm (4"), 150mm (6") | Custom non-standard sizes, Dual/Triple scale dials, Custom Logos |
| Wetted Parts Material | AISI 304 Stainless Steel / Copper Alloy | AISI 316L, Monel 400, Hastelloy C-276, Tantalum Diaphragms |
| Accuracy Class (EN 837-1) | Class 1.6 (±1.6% Span) | Class 1.0 (±1.0%) or Precision Class 0.5 (±0.5% Full Scale) |
| Pressure Ranges | -1 bar to 1000 bar (-30 inHg to 15,000 PSI) | Micro-pressure (0-2.5 mbar) up to High-Pressure (0-4000 bar) |
| Process Connection | 1/4", 1/2" NPT, BSP, BSPT male threads | Sanitary Tri-Clamp, Flanged (ANSI/EN), Flush Diaphragm, Quick-Connect |
| Ambient Temperature Range | -20°C to +60°C (Dry) | -40°C to +200°C (High-Temp Cooling Elements / Thermal Dissipators) |
| Switch Contact Options | N/A (Purely Mechanical) | Magnetic Snap-Action Contacts, Inductive Contacts, Transmitter Output (4-20mA) |
How our engineering department translates global client specifications into tailored industrial measurement hardware.
We provide customized dial faces with customer branding, multi-color pressure zones (green/yellow/red range markers), dual units (PSI/Bar/kPa/MPa), and anti-parallax pointers for precise manual visual inspection.
For highly corrosive, viscous, crystallizing, or sanitary hygienic media (food & pharma), we custom-integrate capillary-type and direct-mount diaphragm seal isolators coated with PTFE, Hastelloy, or Gold plating.
Transform mechanical gauges into process control limit switches. We offer adjustable single, double, or triple contact circuits (normally open/closed) for automated pump control, alarm signaling, and safety shutoff.
To combat intense system vibration and rapid pressure pulsations, gauges are liquid-filled with pure 99.7% Glycerin, Silicone Fluid (-40°C to +200°C), or Fluorolube for oxygen service applications.
Deploying targeted pressure measurement solutions across critical global industries.
Engineered to withstand sour gas (H2S) environments according to NACE MR0175 / ISO 15156 standards. Our heavy-duty solid-front gauges with phenolic or stainless steel cases ensure safety under explosive upstream and downstream refining conditions.
Featuring sanitary Tri-Clamp connections, polished surface roughness (Ra < 0.4 μm), and FDA-approved fill fluids. Designed for CIP (Clean-in-Place) and SIP (Sterilize-in-Place) process cycles without drift.
Specially treated alloy components prevent hydrogen embrittlement in green hydrogen production, fuel cell testing, and high-pressure storage systems operating at up to 700 bar (10,000 PSI).
Specialized SF6 gas density monitors and pressure gauges for high-voltage switchgear. Delivers temperature-compensated readouts to ensure electrical substation safety and grid reliability.
Shock-proof, liquid-filled stainless steel gauges built to absorb violent continuous vibration, pressure spikes, and mechanical hammer in mobile hydraulics and industrial presses.
Reliable, cost-effective mechanical and digital monitoring solutions for chillers, boilers, water treatment plants, and smart building management systems (BMS).
Combining 20+ years of industrial legacy with modern automated production and global logistics scalability.
Our digital optical calibration machines remove human error from pointer alignment and span setting, ensuring every gauge meets strict Class 1.0 or Class 0.5 tolerances under ISO 17025 certified laboratory protocols.
Every stainless steel pressure gauge with welded seals undergoes high-sensitivity mass spectrometer helium leak testing to guarantee zero containment loss down to 1x10-9 mbar·l/s.
Direct strategic partnerships with premium steel foundries ensure certified metallurgy traceability (EN 10204 3.1 material certificates), stable pricing, and uninterrupted production schedules.
Huzhou Accuracy Instrument CO LTD is professionally engaged in the development, sales and service of industrial mechanical pressure gauges, bi-metal thermometers, SF6 manometer, pressure sensor. Products are widely used in various applications such as Mechanical Engineering, Chemical Engineering, Food Industry, Pharmaceutical, and high technology electric appliances.
Established over two decades ago, our pressure gauge manufacturing facility spans 3,000 square meters, equipped with advanced production lines and rigorous quality control systems. As an industry leader, we integrate innovation with precision engineering to deliver reliable measurement solutions for global clients.
R&D Department (20 specialists): Focuses on material innovation, smart sensor integration, and compliance with international standards (e.g., ISO, API).
Production Workforce (120 technicians): Utilizes automated assembly and laser calibration technologies to ensure product durability and accuracy.
Sales & Service Unit (15 professionals): Provides 24/7 technical support and customized solutions across 30+ countries.
Annual output exceeds 2 million units, covering industrial-grade gauges (e.g., stainless steel gauge, black steel gauge, shock-proof gauge, sf6 gauge, thermometer, pressure sensor) for oil/gas, HVAC, and pharmaceutical sectors.
Products exported worldwide, with certifications including ISO, SGS, and CE, earning recognition for corrosion resistance and ±0.5% precision.
Our laboratory conducts 100% pressure cycle tests and environmental simulations, adhering to ISO 9001 and ISO 17025 standards. Continuous improvement drives our reputation for "zero-leak" performance in extreme conditions, supported by a one-year warranty.
We have long followed the concept of "reasonable price, accurate delivery, good quality" and several business management models to keep our production quality above the required benchmark under ISO9001:2008 certified.
Bridging traditional mechanical gauge longevity with smart IIoT digitizing tech.
Integrating low-power Bluetooth, LoRaWAN, and NB-IoT wireless transmission modules directly inside classic stainless steel gauge housings for dual mechanical visual reading and cloud asset monitoring.
Advancing micro-fused silicon piezoresistive strain gauge technology glass-bonded at high temperatures onto 17-4PH or 316L diaphragms, eliminating organic adhesive degradation.
Pioneering eco-friendly synthetic fill liquids with ultra-stable viscosity indices (-50°C to +220°C) for zero environmental hazard during end-of-life recycling.
Ensuring compliance with international engineering codes for hassle-free global deployment.
Our North American custom gauges comply strictly with ASME B40.100 standards, including grade designation (Grade 2A, 3A, 4A), dial sizing, safety blow-out requirements, and thread configurations (1/4" NPT, 1/2" NPT).
European process industries mandate EN 837-1 compliance for Bourdon tube pressure gauges. Our products meet all structural, pointer movement, accuracy class, and pressure connection specifications (G 1/4 B, G 1/2 B threads).
For hazardous area installations (Zone 0, Zone 1, Zone 2), our electric contact and transmitter pressure instruments carry ATEX and IECEx intrinsically safe and explosion-proof certifications.
Expert engineering answers to common technical queries regarding custom pressure gauges and OEM manufacturing.
Explore our complete product line including capillary thermometers, ceramic transducers, and solid-front industrial indicators.
Accuracy Instrument