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Dual Scale HVAC Pressure Gauge

HVAC Industry

Dual Scale HVAC Pressure Gauge

Precision pressure monitoring for modern climate control systems. Simultaneous PSI & Bar readings with MES-tracked manufacturing excellence for unmatched reliability.

ISO9001:2015 CE Certified RoHS Compliant MES Traced Dual Scale

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Product Introduction

The core of HVAC pressure monitoring technology

The Dual Scale HVAC Pressure Gauge represents the pinnacle of pressure monitoring technology for modern climate control systems. In an industry where precision is non-negotiable, this instrument provides clear, simultaneous readings in multiple units—typically PSI and Bar or kPa—allowing technicians to operate across international standards without manual conversion errors.

At the heart of our manufacturing philosophy is the integration of the Advanced MES (Manufacturing Execution System). Since 2023, every dual-scale gauge produced in our facility is tracked via a digital twin, ensuring that the raw materials, calibration data, and assembly steps are fully visualized. The 100,000-level clean workshop ensures that the internal Bourdon tube and movement remain free from microscopic contaminants that could compromise long-term accuracy.

Unlike standard industrial gauges, our HVAC-specific models feature a high-visibility dial design. The contrast between the black and red scales is optimized for low-light mechanical rooms, ensuring that pressure spikes or drops are identified instantly. By focusing on Extreme Durability and Precision Sensing, we provide a tool that doesn't just measure pressure but ensures the safety and efficiency of the entire thermal cycle.

Furthermore, the evolution of smart buildings requires components that can be trusted for decades. Our dual-scale gauges are designed with a fatigue-resistant copper alloy or stainless steel internal structure, capable of millions of pressure cycles without zero-point drift. This longevity aligns with the global trend toward sustainable building maintenance, reducing the need for frequent replacements and minimizing system downtime.

Core Advantages

Digital manufacturing meets precision engineering

20+
Years of R&D
100K
Clean Workshop
50+
Countries Served
  • MES Digital Traceability — Full production history for 100% quality assurance
  • High-Precision Movement — In-house gears for smooth pointer & zero-point stability
  • Vibration Resistance — Optional glycerin filling for compressor pulse protection
  • Dual-Unit Versatility — Imperial & Metric scales for global compatibility
  • UV-Resistant Dial Face — Fade-proof printing withstands outdoor condenser exposure

Specifications

Standard technical parameters

Dial Size1.5" (40mm), 2.0" (50mm), 2.5" (63mm), 4.0" (100mm)
Accuracy ClassClass 1.6% or 2.5% Full Scale
Scale Range0-30 PSI / 0-2 Bar to 0-500 PSI / 0-34 Bar (Dual Scale)
Connection1/8", 1/4", 3/8" NPT / BSPT Brass or Stainless Steel
Case MaterialBlack Steel, Chrome Plated, or 304 Stainless Steel
WindowPolycarbonate or Tempered Glass
Fill FluidDry or Glycerin-Filled (Optional)
Process Temperature-40°C to +70°C (Standard)
Bourdon TubePhosphor Bronze or 316L Stainless Steel

Technical Summary

Order & production details

MOQ500 Pieces (Standard Models)
Lead Time20-30 Days depending on quantity
PackagingNeutral Color Box / Export Master Carton / Palletization
CertificationsISO9001:2015, CE, RoHS Compliant
Raw MaterialsH59 Brass, 304 SS, Phosphor Bronze Bourdon Tube
CustomizationLogo Printing, Scale Range, Thread Size, Case Material, Dial Color
Port of ExportNingbo / Shanghai
Payment TermsT/T, L/C at Sight

Our Partners

Trusted by leading brands worldwide

Industrial Applications

Trusted across critical HVAC and thermal management systems worldwide

Commercial Chillers

Monitoring refrigerant suction and discharge pressures for optimal chiller efficiency and refrigerant charge management

Boiler Systems

Real-time tracking of steam and hot water pressure to prevent overpressure events and ensure safe operation

Air Handling Units

Checking filter status, duct static pressure, and coil pressure drop across commercial AHU installations

Hydraulic Heating

Ensuring optimal fluid pressure in radiant floor and panel heating systems for consistent heat delivery

Refrigeration Units

Precise dual-unit measurement for walk-in freezers, cold storage rooms, and display case refrigeration

Technical Highlights & QC

Rigorous testing ensures every gauge performs flawlessly

  • Fatigue Resistance Test: Every batch undergoes 10,000+ pressure cycle tests to ensure the Bourdon tube retains its elasticity without deformation or zero-point shift.
  • Leak Integrity: Helium mass spectrometer leak detection for all hermetically sealed units, ensuring zero leakage of internal damping glycerin oil even under vibration.
  • Automated Calibration: Advanced laser-calibration equipment ensures the pointer indicates exact pressure across the entire 270-degree sweep arc within ±1.6% tolerance.
  • Salt Spray Testing: 500-hour salt spray chamber validation on all exterior coatings and case materials for coastal HVAC installations.
  • MES Batch Traceability: Every gauge carries a unique QR-coded serial number linked to its full digital manufacturing record for complete after-sale traceability.

Environment & Media Compatibility

Built for the harshest operating conditions

  • Operating Temperature Range: Standard models operate reliably from -40°C to +70°C, covering extreme outdoor winter and summer HVAC condenser conditions.
  • IP Protection Class: Available in IP65 and IP67 ratings, providing complete protection against dust ingress and heavy rain or splashing water in mechanical rooms.
  • Corrosion Shield: Specialized epoxy coatings and 316L stainless steel wetted parts to prevent salt spray damage in coastal or chemically aggressive environments.
  • Refrigerant Compatibility: Internal components rated for R22, R134a, R410A, R32, and R600a refrigerants without swelling, corrosion, or seal degradation.
  • UV Resistance: Dial face printing uses UV-stable inks to prevent fading after years of outdoor exposure on rooftop condensing units.

Pro Tips for Longevity

Installation & maintenance best practices

  • Surge Protection: Use a snubber or capillary tube when measuring media with rapid pressure fluctuations to protect the internal Bourdon tube and movement from fatigue damage.
  • Vertical Installation: For maximum accuracy, gauges should be mounted vertically at 12 o'clock position. Ensure the sealing washer material is compatible with the system refrigerant.
  • Easy Ventilation: Liquid-filled gauges feature a ventable fill plug on the top of the case to equalize internal and atmospheric pressure after installation, ensuring full 1.6% accuracy.
  • Isolation Valve: Install a 1/4-turn ball valve below the gauge to allow in-service removal and replacement without system shutdown or refrigerant loss.
  • Annual Inspection: Cross-check readings against a certified master gauge annually to detect any zero-point drift before it affects system diagnostics.

Payment & Logistics

Flexible and secure global trade solutions

  • Flexible Payment: Support for T/T (Telegraphic Transfer), L/C at sight, Western Union, and secure online B2B trade platforms for transparent transactions.
  • Global Shipping: Exporting from Ningbo and Shanghai ports to over 50 countries via sea freight, air cargo, or DHL/FedEx express courier services.
  • Protective Packaging: Individual inner boxes with foam shock-absorbent inserts prevent calibration shift and pointer damage during long-distance transit.
  • Export Documentation: Full commercial invoice, packing list, certificate of origin, and test reports provided to facilitate smooth customs clearance.
  • Sample Service: Pre-production samples available within 7 working days for approval before mass production begins.

About Us

Zhoushan Jiaerling Meter Co., Ltd. — 20 years of precision manufacturing

Zhoushan Jiaerling Meter Co., Ltd.

Zhoushan Jiaerling Meter Co., Ltd. was established in 2004. It is China Dual Scale HVAC Pressure Gauge Manufacturers and Wholesale Dual Scale HVAC Pressure Gauge Factory, which is a high-tech enterprise integrating design, research and development, manufacturing, import and export trade.

The company is located in Zhoushan City, Zhejiang Province, covering an area of 15,000 square meters, equipped with a 100,000-level clean workshop, conventional production and assembly workshop, automated production workshop, new laboratory and comprehensive office building.

After more than 20 years of hard work and development, the company has a stable design and development, production team, and advanced production and testing equipment. The company specializes in the production of various types of pressure gauges with complete specifications, and the annual output of pressure gauges reaches 6 million. In order to further develop, the company not only seeks improvement in technology, but also pays more attention to product quality and after-sales service. The company's purpose is to "regard quality as life, survive by reputation, promote development by technology, and serve customers with high-quality brands". The products are sold all over the world and are well received by domestic and foreign customers.

In 2019, the company participated in the compilation of the standard T/CECS10012-2019 "Gas Heating Hot Water Boiler and Water Heater Water Circuit Components" of the China Engineering Construction Standardization Association.

Under the implementation of modern and digital enterprise management, the company has successfully introduced the advanced MES system in 2023, and the order process is fully visualized to track data, ensuring the continuity of production and improving production efficiency.

The company will continue to adhere to the principles of excellence, accuracy, reliability, continuous improvement, and meeting customer needs, hoping to share harmony and prosperity with friends across the country.

20+
01.Corporate History
15,000M²
02.Factory Area
6,000,000
03.Annual Output (Pieces)
50+
04.Export Area

Honor

Certifications and proprietary achievements

Frequently Asked Questions

Quick answers to common technical and ordering questions

What is the benefit of a dual scale gauge in HVAC?
It allows technicians to cross-reference pressure data in PSI and Bar simultaneously, reducing calculation errors during refrigerant system charging and diagnostics without unit conversion tables.
Can these gauges handle high-vibration environments?
Yes. We recommend our glycerin-filled liquid versions for environments with high mechanical pulse or compressor vibration. The fill fluid dampens needle oscillation and prevents pointer fatigue.
Are the gauges compatible with all refrigerants?
We offer specific internal material configurations compatible with R22, R134a, R410A, R32, and R600a. Please specify your refrigerant type when ordering to ensure correct material selection.
How does the MES system benefit buyers?
It provides full visualization of your order status, from raw material sourcing to final pressure accuracy testing, with digital records available for your quality audit requirements.
Is there a field recalibration option?
Select models feature an external zero-adjustment screw accessible from the front of the case for in-situ recalibration without removing the gauge from the system.
What accuracy class is standard for HVAC models?
Our standard is Class 1.6 (±1.6% of full scale), which exceeds most residential and commercial HVAC requirements. Class 1.0 is available for higher-precision applications on request.
Do you provide NPT or BSP threads?
Both are available to match plumbing standards: NPT for North American markets and BSP/BSPT for European, Asian, and Australian HVAC systems. Please specify at order time.
Which case material is best for outdoor installations?
304 or 316 stainless steel cases offer the best protection against UV rays, humidity, and temperature cycling in outdoor condenser and rooftop HVAC unit applications.
Can I get a private label or OEM dial face?
Yes. We offer complete dial face customization including brand logos, custom scale ranges, color-coded pressure zones, and unit markings for OEM and distributor branding programs.
What is the expected service life?
With correct installation, our gauges are designed for over 10,000 operational hours. Glycerin-filled models in vibrating environments typically achieve equal or greater lifespan versus dry gauges.

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