High-Precision OEM Gauges, Sensors & Transmitters Supplied Direct from Factory
Established over twenty years ago, Huzhou Accuracy Instrument Co., Ltd. has grown into a world-class OEM/ODM manufacturer specializing in precision pressure gauges, bi-metal thermometers, SF6 gas density monitors, and advanced electronic pressure transmitters. Operating from our state-of-the-art 3,000 square meter manufacturing hub, we combine automated robotic assembly with stringent quality verification protocols to supply global markets.
Industrial pressure measurement demands zero tolerance for error. Whether monitoring volatile media in petrochemical refining, maintaining ultra-clean pressure gradients in pharmaceutical processing, or enduring intense mechanical vibration in hydraulic systems, our instruments are designed to deliver consistent ±0.5% to ±1.6% accuracy (ANSI/ASME B40.100 & EN 837-1).
Every air pressure gauge and sensor leaving our facility undergoes 100% pressure cycle testing, mass spectrometer helium leak detection, and environmental simulation. Backed by ISO 9001:2015 certification and comprehensive international compliance.
Tailored Industrial Instruments Designed for Demanding Application Specifications
Offered in black steel, brass internal, and full 316 stainless steel configurations. Dial sizes from 40mm to 150mm. Designed to EN 837-1 standards with customizable scales (PSI, Bar, kPa, MPa).
Designed for corrosive, viscous, crystallizing, or ultra-pure media. Features 316L, Hastelloy C-276, Tantalum, or PTFE linings with sanitary tri-clamp or flanged connections.
Glycerine or Silicon oil-filled housings effectively dampen extreme mechanical vibration and rapid pressure pulsations, drastically extending Bourdon tube service life.
Integrated magnetic-snap or inductive contacts for automatic process control, alarm triggers, and pressure regulation in explosive (ATEX certified) or standard industrial setups.
Solid-state piezoresistive sensors providing standard 4-20mA, 0-10V, or RS485 Modbus output signals with non-linearity ratings up to ±0.25% F.S. for smart automation.
Heavy-duty temperature measuring instruments featuring hermetically sealed dials, adjustable stem angles, and capillary tubes up to 10 meters for remote thermal monitoring.
| Parameter | Standard Industrial Series | Stainless Steel Process Series | Diaphragm Sealed Series | Digital / Transducer Series |
|---|---|---|---|---|
| Accuracy Class | Class 1.6 / Class 2.5 | Class 1.0 / Class 1.6 | Class 1.0 / Class 1.6 | ±0.5% F.S. / ±0.25% F.S. |
| Pressure Ranges | -0.1 to 60 MPa (0-8700 PSI) | -0.1 to 100 MPa | -0.1 to 4 MPa (Low/Med) | 0 to 100 MPa continuous |
| Wetted Parts | Copper Alloy / Brass | AISI 316 / 316L SS | 316L, Hastelloy C, PTFE | 316L SS / Ceramic / Silicon |
| Case Material | Black Painted Steel / Plastic | AISI 304 SS (Bayonet Ring) | 304 SS / Phenolic Solid Front | Stainless Steel / Die-cast Alum |
| Operating Temp. | -20°C to +60°C | -40°C to +200°C (Unfilled) | -40°C to +150°C (Special fills) | -30°C to +85°C compensated |
| Ingress Protection | IP44 / IP54 | IP65 / IP67 (NEMA 4X) | IP65 / IP66 | IP67 / Explosion-proof Exd II CT6 |
In an increasingly volatile global market, procuring high-precision measurement instruments requires more than just product availability; it demands a resilient, flexible, and technologically modern supply chain. Huzhou Accuracy Instrument operates at the intersection of traditional German precision metrology standards and modern Chinese advanced manufacturing capabilities.
Our production floor utilizes automated robotic TIG and laser welding systems for Bourdon tube to socket joints, as well as diaphragm seal encapsulation. This eliminates human assembly variability, providing structural integrity capable of enduring over 1,000,000 pressure fatigue cycles without zero-point drift.
Calibration is performed on automated pressure rigs equipped with high-resolution camera vision systems. High-precision optical algorithms compare physical pointer positions against digital reference standards at multiple cardinal points, ensuring exact linearity adjustments before dial installation.
By keeping tube drawing, movement machining, dial printing, and casing fabrication under localized control, we reduce raw material lead times by 40%. Our localized supply cluster guarantees seamless scalability whether fulfillment demands 500 units or 100,000 units monthly.
For high-hazard, toxic, or ultra-pure gas applications (such as SF6 switchgear and oxygen lines), we employ high-sensitivity helium mass spectrometers to test seal integrity down to leak rates of less than 1×10⁻⁹ mbar·l/s, guaranteeing total containment.
Purpose-Built Pressure Instrumentation Engineered for Demanding Operational Realities
Designed to combat corrosive H2S environments, heavy vibration, and outdoor ambient temperature spikes. Engineered with solid-front safety cases, blow-out backs, and NACE MR0175 compliant 316L or Hastelloy wetted materials.
High-pressure spike protection for heavy machinery and power units. Glycerine-filled stainless steel cases resist continuous engine vibration, fluid hammer, and severe weather exposure (IP67 sealed).
Hygiene-first pressure measurement with ultra-polished surface finishes (Ra < 0.4 µm). CIP (Clean-in-Place) and SIP (Sterilize-in-Place) compatible diaphragm seals using FDA-approved system fill fluids (Glycerine/Vegetable oil).
Low-range mechanical differential gauges and thin-film micro-transducers engineered to measure tiny air pressure differentials across filters, blowers, and cleanroom air locks with pinpoint accuracy.
Gas-density monitoring solutions with temperature compensation algorithms. Engineered to prevent catastrophic flashovers in high-voltage circuit breakers by constantly tracking gas containment tightness.
Cost-effective, highly reliable black steel and semi-steel air manometers tailored for air compressors, pneumatic tools, gas regulators, and water pump assemblies worldwide.
As a dedicated original equipment manufacturer (OEM), we offer comprehensive customization capabilities allowing global instrumentation brands, distributors, and engineering procurement contractors (EPCs) to tailor every component to exact job specifications.
Private label logos, custom dual/triple scales (bar/psi/kPa), color-coded danger zones, anti-parallax mirror dials, and fluorescent pointers.
NPT, BSP, BSPT, Metric, G-threads, back mount, bottom mount, front flange, or U-clamp bracket options engineered to fit any panel housing.
Bourdon tubes and sockets crafted in Phosphor Bronze, Stainless Steel 316L, Monel 400, or coated with anti-corrosive PTFE linings.
99.5% Pure Glycerine, Silicone Oil (DC 200), Halocarbon oil for oxygen safety, and food-grade fill options to suit diverse temperature spectrums.
International buyers require total assurance that imported instrumentation complies fully with target-market safety, metrology, and environmental laws. Our manufacturing operations strictly adhere to international quality benchmarks:
Pioneering the Transition from Analog Mechanical Gauges to IIoT Connected Sensing
Integrating ultra-low-power LoRaWAN, NB-IoT, and WirelessHART modules directly into traditional pressure gauge enclosures. Enables remote monitoring of pipeline networks and off-grid processing facilities without cabling infrastructure.
Embedding micro-strain sensor arrays along Bourdon tube walls. Onboard microcontrollers calculate material stress cycles in real-time, sending automated maintenance alerts to SCADA systems prior to mechanical fatigue failure.
Transitioning from bonded strain gauges to atomic-level sputter-deposited thin-film MEMS sensors directly onto stainless steel diaphragms. Provides unmatched long-term stability (<0.1% drift/year) under severe thermal shock.
Expert Insights on Selection, Installation, and Maintenance of Industrial Pressure Gauges
Complete Range of Transducers, Black Steel Gauges, and Bimetal Thermometers
Accuracy Instrument