Wholesale Air Conditioning Refrigerant Pressure Gauge Factory, Manufacturers

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Product Introduction

Precision instrumentation engineered for air conditioning refrigerant pressure gauge applications

The Air Conditioning Refrigerant Pressure Gauge is engineered around the specific demands of refrigeration and air conditioning service work, where a technician needs an instant, reliable pressure reading while connecting and disconnecting hoses dozens of times a day on manifold sets, recovery machines, and vacuum pumps. The dial combines a PSI/Bar pressure scale with a saturation temperature scale for common refrigerants, letting a technician judge system charge condition without reaching for a separate reference chart.

Internally, a bronze or stainless steel Bourdon tube converts refrigerant pressure into pointer movement through a precision brass movement designed to tolerate the rapid pressure spikes that occur when a service valve is cracked open. The wetted parts are selected for compatibility with common HFC, HFO, and legacy HCFC refrigerant blends, resisting the mild acidity that can develop in systems with moisture contamination or aged compressor oil.

Every gauge is assembled in our 100,000-level clean workshop, where the internal movement is protected from the particulate contamination that causes premature bearing wear in lesser gauges exposed to field dust and grit. Glycerin-filled case options are also available to damp pointer flutter from the pressure pulsation typical of reciprocating and scroll compressor operation, giving technicians a stable, readable dial even while the system is actively cycling.

Because this gauge is built for connect/disconnect service duty rather than permanent installation, the case is fitted with a protective rubber boot on select models to survive drops on concrete shop floors and rooftop gravel, and every unit's calibration is logged in our Advanced MES digital tracking system so field-return gauges can be traced back to their original production batch.

Core Advantages

Engineered for reliability where it matters most

2"–3.5"

Available Dial Sizes

±1.5%

Accuracy Class

R410A/R22/R404A

Common Refrigerant Scales

Dual Pressure/Temperature Scale — Reads PSI and Bar alongside saturation temperature for common refrigerant blends on one dial
Pulsation-Resistant Movement — Optional glycerin fill damps needle flutter from reciprocating and scroll compressor pressure pulses
Refrigerant-Compatible Wetted Parts — Bronze and stainless internals resist the mild acidity found in moisture-contaminated refrigerant circuits
Rugged Service Design — Reinforced movement tolerates the rapid pressure spikes of frequent hose connect and disconnect cycles
Protective Rubber Boot Option — Shock-absorbing boot protects the case from drops on shop floors and rooftop service platforms
MES Traced Production — Serial-linked quality data from raw material to shipment for full after-sale traceability

Specifications

Standard technical parameters

Dial Size	2.0" (50mm), 2.5" (63mm), 3.5" (90mm)
Accuracy Class	Class 1.5 Full Scale (Class 1.0 on request)
Pressure Range	-1 to 7 Bar (Low Side), -1 to 35 Bar (High Side)
Dual Scale Units	PSI / Bar / Saturation Temperature (°C or °F)
Refrigerant Scale Options	R22, R404A, R410A, R134a, R32, R407C, custom blends
Bourdon Tube	Phosphor Bronze (standard) or 316L Stainless Steel
Case Fill	Dry (standard) or Glycerin-Filled (anti-pulsation)
Connection Thread	1/8" NPT Male (standard), 1/4" SAE Flare adapter available
Case Material	Chrome-Plated Brass with optional rubber protective boot
Operating Temperature	-20°C to +65°C ambient

Technical Summary

Order & production details

MOQ	500 Pieces (Standard Refrigerant Scale Models)
Lead Time	18-25 Days (custom refrigerant scale prints may extend timeline)
Packaging	Bulk carton packing for manifold set assembly lines; individual boxes for retail
Certifications	ISO9001:2015, CE, RoHS Compliant
Raw Materials	H59 Brass, Phosphor Bronze, 316L SS, Rubber Boot Compound
Customization	Refrigerant scale print, pressure range, connection thread, boot color
Port of Export	Ningbo / Shanghai
Payment Terms	T/T, L/C at Sight, Western Union

Our Partners

Trusted by leading brands worldwide

Industrial Applications

Where air conditioning refrigerant pressure gauge performance is mission-critical

Refrigerant Manifold Sets

Paired low-side and high-side gauges mounted on service manifolds for charging and recovery work

Vacuum Pump Evacuation Checks

Fine low-pressure scale confirms deep vacuum levels are reached before refrigerant charging begins

Split System AC Service Vans

Rugged, boot-protected gauges withstand daily transport and use in mobile service tool kits

Rooftop Package Unit Diagnostics

Field-rated gauges read suction and discharge pressure directly at rooftop condensing unit service ports

Refrigerant Recovery Machines

Integrated into recovery unit control panels to monitor cylinder and system-side pressure during recovery

Technical Highlights & QC

Every unit validated for zero-defect performance

Refrigerant Compatibility Test: Wetted parts are exposed to representative refrigerant and oil samples to confirm no corrosion or seal degradation occurs.
Pressure Spike Cycling: Movement is subjected to repeated rapid pressure spikes simulating service valve cracking to confirm no calibration shift.
Pulsation Damping Verification: Glycerin-filled units are tested under simulated compressor pulsation to confirm needle stability within specification.
Drop Test on Boot-Equipped Models: Rubber-booted gauges are drop-tested onto a hard surface to confirm the case and internal movement survive typical field handling.
Scale Print Accuracy Check: Refrigerant temperature scale printing is cross-checked against published saturation tables for the specified blend.
MES Serial Tracking: Refrigerant scale type, pressure range, and calibration data are stored digitally against each unit's serial number.

Environment & Media Compatibility

Engineered for demanding operating environments

Rooftop Sun Exposure: UV-stable dial printing resists fading during extended outdoor service work on rooftop condensing units.
Shop Floor Drop Impact: Reinforced case construction and optional rubber boot absorb impact from accidental drops during service.
Refrigerant Oil Contact: Wetted parts resist the mild acids that can form in refrigerant oil contaminated by moisture or system breakdown.
Rapid Pressure Cycling: Reinforced Bourdon tube and movement tolerate the frequent pressure spikes of connect/disconnect service cycles.
Cold Ambient Service Conditions: Movement lubrication remains effective in the low ambient temperatures typical of winter heat pump service calls.
Humid Coastal Environments: Chrome-plated brass case resists corrosion in the humid coastal climates common in many HVAC service territories.

Pro Tips for Longevity

Installation & maintenance best practices

Match the Gauge to the Refrigerant: Always confirm the dial's printed refrigerant scale matches the system charge; mismatched scales give a misleading temperature reading.
Purge Hoses Before Connecting: Purge manifold hoses of air before connecting to the service port to prevent inaccurate low-side pressure readings.
Protect the Gauge Face During Transport: Store manifold sets in a padded case; repeated impact during transport is the leading cause of premature gauge failure.
Do Not Exceed Rated Pressure: Never expose the low-side gauge to high-side system pressure; this is the most common cause of field gauge damage.
Check Zero Before Each Job: Verify the gauge reads zero at atmospheric pressure before connecting to a system to catch calibration drift early.
Choose Glycerin Fill for Pulsating Systems: Specify glycerin-filled gauges for service on reciprocating compressor systems where pulsation is more pronounced.

Payment & Logistics

Reliable global supply chain from factory to your site

Flexible Payment Terms: We support T/T (30% deposit, balance before shipment), L/C at sight for large orders, and secure B2B trade assurance platforms for new customers.
Global Freight Options: Sea freight from Ningbo or Shanghai for bulk orders; DHL, FedEx, or UPS air express for urgent sample and small-batch shipments.
Manifold Assembly-Ready Packaging: Bulk bagged and boxed packing options are available for customers assembling complete manifold sets on their own lines.
Full Export Documentation: Commercial invoice, packing list, certificate of origin (CO), material certificates, and CE declaration of conformity provided with every shipment.
Sample Lead Time: Standard refrigerant scale samples available within 5-7 working days. Custom scale prints require 10-12 working days.
After-Sales Support: Our technical team provides refrigerant scale reference charts and calibration documentation to support your quality team.

About Us

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

Zhoushan Jiaerling Meter Co., Ltd. was established in 2004. It is China Air Conditioning Refrigerant Pressure Gauge Manufacturers and Wholesale Air Conditioning Refrigerant 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.

Honor

Certifications and proprietary achievements

High-Tech Enterprise

Proprietary

Frequently Asked Questions

Everything you need to know before specifying or ordering

Can one gauge be used for multiple refrigerant types?

Some gauges print several common refrigerant scales together on one dial; for best accuracy on a specific blend, a dedicated single-scale dial is recommended.

What is the difference between low-side and high-side gauges?

Low-side gauges typically read -1 to 7 Bar for suction-side service, while high-side gauges read up to 35 Bar for discharge-side and charging work.

Should I choose a glycerin-filled or dry gauge?

Glycerin fill damps needle flutter on pulsating compressor systems; dry gauges are lighter and adequate for steady-state readings.

What connection thread comes standard?

1/8" NPT male is standard; a 1/4" SAE flare adapter is available for direct connection to common service hoses.

How often should refrigerant gauges be recalibrated?

For critical charging work, annual calibration verification against a certified reference is recommended given daily field handling.

Can the gauge be used on CO2 or ammonia systems?

Standard wetted materials are not rated for CO2 or ammonia; please consult our engineering team for compatible material options.

What causes a gauge to read inaccurately over time?

Repeated pressure spikes and physical impact are the most common causes of drift; periodic zero-checks catch this early.

Is the rubber boot available in different colors?

Yes, boot color can be specified to color-code low-side and high-side gauges for faster visual identification in the field.

What is the maximum ambient temperature for reliable operation?

Standard units are rated to +65°C ambient; consult us for high-ambient rooftop applications in extreme climates.

Can you print our company logo on the dial?

Yes, OEM dial printing with your company branding is available for qualifying order quantities.

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