Technical Insight: Mechanical pressure measurement using Bourdon tube elements remains the primary defense for overpressure mitigation in hazardous industrial processes. Certified CE compliance under the Pressure Equipment Directive (PED 2014/68/EU) guarantees structural integrity against cyclic fatigue, pressure spikes, and corrosive fluid contact.
In high-reliability industrial automation, the mechanical pressure gauge is not merely a display instrument; it serves as a critical safety device. Bourdon pressure gauges operate based on the elasticity principle of C-shaped, helical, or spiral metallic tubing. When subjected to internal pressure, the non-circular cross-section of the tube attempts to regain its circular form, generating a proportional displacement. This minute mechanical movement is magnified via a precision gear mechanism to drive the dial pointer.
Selecting a reliable Customized Bourdon Pressure Gauge Supplier requires deep evaluation of material science, laser-welding integrity, environmental damping (liquid filling such as Glycerin or Silicone), and structural compliance with EN 837-1 standards.
Huzhou Accuracy Instrument Co., Ltd. is professionally engaged in the development, sales, and service of industrial mechanical pressure gauges, bi-metal thermometers, SF6 manometers, and advanced pressure sensors. Our solutions serve mission-critical applications across Mechanical Engineering, Chemical Processing, Food & Beverage, Pharmaceuticals, and High-Technology Electric Appliances.
Established over two decades ago, our advanced pressure gauge manufacturing facility spans 3,000 square meters, equipped with automated production lines, laser welding technology, and strict quality control laboratories. As an industry leader, we integrate continuous R&D with precision engineering to deliver zero-defect instrumentation worldwide.
20 Specialists: Focuses on metallurgic material innovation, smart sensor micro-integration, and international standard compliance (ISO, API, ASME, EN 837-1).
120 Technicians: Utilizes automated robotics assembly, TIG & laser welding, and automated multi-point calibration to deliver maximum zero-leak durability.
15 Professionals: Delivers 24/7 technical support, field selection assistance, and OEM custom solutions across 30+ countries worldwide.
Selection of tube materials dictates long-term elasticity and corrosion resistance:
Preventing mechanical wear under high-vibration equipment settings:
Seamless structural integration into diverse plant layouts:
| Parameter / Feature | Standard Production Specifications | Custom OEM / Heavy-Industrial Upgrades |
|---|---|---|
| Dial Sizes (mm) | 40mm, 50mm, 63mm, 100mm, 150mm | Custom sizes from 25mm up to 250mm dial faces |
| Accuracy Class (EN 837-1) | Class 1.6 or Class 2.5 | High-Precision Class 1.0 or Master Test Gauge Class 0.5 |
| Pressure Ranges | 0...1 bar to 0...600 bar (-1 bar Vacuum included) | Ultra-high pressure (0...1600 bar) or ultra-low micro-pressure |
| Operating Temperature | Ambient: -20°C to +60°C; Media: Max +60°C | Extreme Temp: -40°C to +200°C (with cooling elements/capillaries) |
| Enclosure Protection | IP54 Weather-resistant | IP65, IP67 Hermetically Sealed / Explosion-Proof ATEX design |
| Electrical Switches | None (Purely Mechanical) | Magnetic Snap-action, Inductive contacts, or 4-20mA Transducer Output |
Designed specifically for compressed natural gas (CNG) storage and fuel dispensing systems. Features resistive sensor integration for electronic telemetry, burst-proof housing, and continuous vibration resilience (ECE R110 compliance).
Hermetically sealed gas density gauges with temperature compensation mechanisms. Ensures continuous surveillance of SF6 gas insulation in high-voltage substations, eliminating false leak alarms caused by ambient thermal fluctuations.
All-stainless steel (316L) construction paired with flush diaphragm seal units. Prevents internal tube clogging when measuring polymer syrups, heavy oils, toxic reagents, or crystallizing process fluids.
Ultra-clean 3A certified designs with electropolished surfaces (Ra < 0.4 µm). Supports CIP (Clean-in-Place) and SIP (Sterilize-in-Place) procedures with zero dead-leg zones to ensure zero bacterial contamination.
Our 3,000 m² factory operates under digitized lean-manufacturing framework. Automated laser welding cells ensure structural joint consistency for high-pressure Bourdon elements, while automated robotic calibration rigs eliminate human error in pointer setting.
This digital infrastructure allows Huzhou Accuracy Instrument to maintain flexible production lines—delivering high-volume standard runs (2+ Million units annually) while accommodating small-batch OEM custom orders with short lead times and strict compliance guarantees.
CE certification verifies compliance with the European Pressure Equipment Directive (PED 2014/68/EU). For industrial buyers and OEMs, CE marking ensures that the instrument's pressure retaining boundary (the Bourdon element and connection socket) has undergone rigorous stress analysis, material traceability checks, and pressure containment tests—preventing catastrophic structural failure in high-pressure installations.
Glycerin filling is the industry standard for damping pointer movement against mechanical vibration and low-frequency pulsation in operating temperatures between -20°C and +60°C. Silicone oil is specified for extended temperature environments (-40°C to +100°C) or where electrical contact switches are integrated, as silicone prevents contact oxidation.
We offer extensive customization including: special scale units (Bar, PSI, kPa, MPa, Kg/cm²), custom company logos on the dial, restricted orifice restrictors for hydraulic shock absorption, electrical contacts for alarm control, specialized thread profiles (G, NPT, PT, Metric, Flanged), and specialized metallurgy (316L, Monel, Hastelloy).
Our production process incorporates 100% helium mass-spectrometer leak testing and high-pressure water bath immersion checks for every welded Bourdon assembly. Furthermore, our ISO 9001 and ISO 17025 compliant QA lab subjects sample batches to 100,000+ pressure cycle stress tests to ensure structural longevity before shipment.
Accuracy Instrument
