Wholesale Domestic Reverse Osmosis Pressure Gauge Factory, Manufacturers

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Product Introduction

Precision instrumentation engineered for domestic reverse osmosis pressure gauge applications

The Domestic Reverse Osmosis Pressure Gauge is built for the specific pressure regime of a home RO system, where a small booster pump lifts feed water to the 0.4 to 0.9 MPa range needed to drive water through a semi-permeable membrane. Unlike a simple tap-water gauge, this instrument must tolerate the rapid pulsation of a diaphragm booster pump and give a steady reading that owners and installers can use to judge whether the membrane is being fed correctly.

A glycerin-filled 40mm case damps the pointer flutter created by the pump's diaphragm strokes, so the dial shows a stable average pressure rather than a jittering needle. The Bourdon tube is made of stainless steel or lead-free brass and the wetted path is designed for feed water that may have already passed through sediment and carbon stages, keeping the reading dependable as cartridges age.

Assembly takes place in our 100,000-level clean workshop, where each case is filled with fluid under vacuum to remove trapped air that would otherwise cause a sluggish or bouncing pointer. Fill batch, calibration sweep, and leak-test results are stored in our Advanced MES digital tracking system against each unit's serial number so RO appliance makers can trace any field return to its production lot.

Because installers frequently diagnose low product water flow by looking at pump and membrane pressure, the dial can be supplied with a marked target band for the pump discharge and a lower band for the drain-restrictor side. This turns the gauge into a quick commissioning and service tool, helping technicians separate a tired booster pump from a fouled membrane or a blocked flow restrictor.

Core Advantages

Engineered for reliability where it matters most

0–1.0 MPa

Booster Pump Working Range

Glycerin

Damped Against Pump Pulsation

40mm

Compact RO Cabinet Size

Pump-Pulse Damping — Glycerin fill smooths the needle motion caused by diaphragm booster pump strokes
Membrane Feed Verification — Confirms feed pressure is within the band needed for proper permeate production
Target-Band Dial Option — Marked pump and drain-side bands help technicians diagnose low product water flow quickly
Vacuum-Filled Case — Air-free fill prevents the sluggish or bouncing pointer that trapped bubbles cause
Potable-Service Materials — Stainless steel or lead-free brass wetted parts suit drinking-water RO appliances
MES Traced Production — Serial-linked quality data from raw material to shipment for full after-sale traceability

Specifications

Standard technical parameters

Dial Size	40mm (1.5") glycerin-filled case
Accuracy Class	Class 2.5 Full Scale
Pressure Range	0-1.0 MPa, 0-1.6 MPa (custom bands available)
Case Fill	Glycerin, vacuum-filled
Bourdon Tube	316 Stainless Steel or Lead-Free Brass
Connection	1/4" NPT/BSPT Bottom or Back Entry
Case Material	304 Stainless Steel or ABS
Window Material	Polycarbonate
Media	Pre-Treated Feed Water, 0-45°C
Dial Options	Pump Band, Drain Band, Brand Logo

Technical Summary

Order & production details

MOQ	1500 Pieces (Standard Range OEM Models)
Lead Time	18-22 Days (vacuum fill and cure time)
Packaging	Upright trays for RO appliance assembly lines; single boxes for service kits
Certifications	ISO9001:2015, CE, RoHS Compliant, Lead-Free Material Declaration
Raw Materials	316 SS, Lead-Free Brass, Glycerin Fill Fluid
Customization	Target bands, connection, case material, branding
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 domestic reverse osmosis pressure gauge performance is mission-critical

Under-Sink RO Drinking Water Systems

Monitors booster pump discharge pressure feeding the membrane housing

Tankless RO Appliances

Provides feed-pressure indication on compact direct-flow RO units without a storage tank

RO Service and Commissioning Kits

Used by installers as a diagnostic gauge to separate pump, membrane, and restrictor faults

Aquarium and Hobby RO Units

Confirms membrane feed pressure on small RO systems used for reef and freshwater aquariums

RO Appliance OEM Production

Supplied to brands as the standard pump-side pressure indicator fitted before final testing

Technical Highlights & QC

Every unit validated for zero-defect performance

Vacuum Fill Verification: Each case is filled under vacuum and inspected to confirm no air bubbles remain that could cause a bouncing pointer.
Pulsation Endurance Test: Sample gauges run on a booster pump test rig for extended periods to confirm damping performance and zero stability.
Case Leak Test: Filled cases are held at elevated temperature and inspected to confirm no glycerin weeps from seals.
Band Alignment Check: Printed target bands are compared to calibrated pressure to confirm they land on the specified values.
Feed-Water Compatibility: Wetted materials are exposed to representative pre-treated feed water to confirm no corrosion or staining.
MES Serial Tracking: Fill batch, band configuration, and calibration data are stored digitally against each unit's serial number.

Environment & Media Compatibility

Engineered for demanding operating environments

Booster Pump Pulsation: Damped movement tolerates the 20-50 Hz pressure ripple produced by small diaphragm pumps.
Humid Under-Sink Cabinets: Sealed stainless or ABS case resists condensation and cabinet humidity.
Membrane Flush Cycles: Gauge tolerates the short pressure changes that occur during automatic membrane flushing.
Feed Water Temperature Variation: Glycerin viscosity remains suitable across the cool to lukewarm feed water range of household supplies.
Vibration from Pump Mounting: Compact rigid movement resists reading disturbance from pump vibration transmitted through the chassis.
Long Idle Periods: Sealed fill prevents dry-out and pointer stiction after long periods without use.

Pro Tips for Longevity

Installation & maintenance best practices

Fit Between Pump and Membrane: Install the gauge on the pump discharge line, ahead of the membrane, to read true feed pressure.
Record Baseline Pressure: Note the pressure with a new membrane so later declines in permeate flow can be linked to feed pressure.
Check Drain Restrictor First: If pressure is normal but product water is low, inspect the flow restrictor before replacing the membrane.
Avoid Air in the Line: Bleed air after cartridge changes; trapped air causes pump surging and a misleading needle swing.
Keep the Case Upright: Mount with the fill plug side up where specified so the damping fluid stays evenly distributed.
Replace Rather Than Refill: If fluid has leaked, replace the gauge instead of topping up with an unspecified liquid.

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.
Fill-Protected Packaging: Each glycerin-filled gauge ships upright in a tray with its case orientation marked to prevent fluid migration in transit.
Full Export Documentation: Commercial invoice, packing list, certificate of origin (CO), fill fluid safety data sheet, and CE declaration of conformity provided with every shipment.
Sample Lead Time: Standard range samples are available in 7-10 working days because of the fill and cure step.
After-Sales Support: Our technical team provides membrane pressure guidance and dial band recommendations for your RO product.

About Us

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

Zhoushan Jiaerling Meter Co., Ltd. was established in 2004. It is China Domestic Reverse Osmosis Pressure Gauge Manufacturers and Wholesale Domestic Reverse Osmosis 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

What pressure should my RO membrane see?

Most home RO membranes work best between 0.4 and 0.9 MPa; consult your membrane manufacturer for the exact target.

Why is the gauge glycerin filled?

The fill damps the rapid pulses of a diaphragm booster pump so the needle reads a steady average value.

Can the gauge show that the membrane is fouled?

It shows feed pressure; a normal pump reading with low product flow points toward membrane fouling or a restrictor issue.

Is a dry version available?

Yes, but a dry gauge will flutter with pump pulsation, so glycerin fill is recommended for booster-pump systems.

Does the fill fluid affect drinking water?

The fill is sealed inside the case and separated from the water path by the Bourdon tube.

What connection is used?

A 1/4-inch NPT or BSPT thread is standard, with adapters for push-fit tubing available.

Can I print my own pressure bands?

Yes, custom target bands and brand logos are available for qualifying OEM quantities.

How accurate is the gauge?

Class 2.5 is standard, which is suitable for service and monitoring in domestic appliances.

Will it work on a tankless RO unit?

Yes, it can monitor feed pressure on tankless units as well as tank-based systems.

How long does the damping fluid last?

In a sealed case the fill typically lasts for the service life of the gauge under normal household conditions.

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