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Product Introduction

Precision instrumentation engineered for espresso machine steam pressure gauge applications

The Espresso Machine Steam Pressure Gauge is engineered specifically for the compact steam boiler found in commercial and prosumer espresso machines, where boiler pressure directly governs both steam wand milk-texturing performance and, through the heat exchanger relationship common in many machine designs, the brew water temperature delivered to the group head. A narrow, well-defined operating band — typically around 1 to 1.5 Bar for most commercial machines — means the dial scale is concentrated for maximum readability exactly where baristas and technicians need it.

A brass or stainless steel Bourdon tube is selected for long-term compatibility with the mineral content of everyday tap and filtered water used to feed espresso machine boilers, resisting the scale buildup that can affect movement accuracy in gauges not specifically designed for this duty. The dial is printed with high-contrast markings and a clear operating-range indicator band, sized and positioned for quick recognition by a barista glancing at the machine between drink orders during a busy service period.

Every gauge is assembled in our 100,000-level clean workshop and calibrated against a certified reference before the recommended operating band is precision-printed onto the dial face, and undergoes thermal cycling testing to confirm stable performance through the repeated heating and cooling that a daily-use commercial machine boiler experiences. Calibration data is logged in our Advanced MES digital tracking system against each unit's serial number, supporting espresso machine OEM quality documentation.

The gauge is available in the compact case sizes common to espresso machine front panels and can be supplied with custom branding for machine manufacturers, along with connection thread options matched to common boiler fitting standards used across commercial and semi-commercial espresso equipment platforms.

Core Advantages

Engineered for reliability where it matters most

40mm–50mm

Common Espresso Case Sizes

±1.6%

Accuracy Class

1–1.5 Bar

Typical Operating Band

Concentrated Operating-Band Scale — Dial resolution focused on the narrow 1-1.5 Bar range where daily espresso machine operation actually occurs
Scale-Resistant Boiler Construction — Bourdon tube material selected for long-term compatibility with everyday tap and filtered water mineral content
High-Contrast Barista-Legible Dial — Clear markings and operating-range indicator band designed for quick recognition during busy service periods
Thermal Cycling Validated — Tested through repeated heating and cooling cycles matching daily commercial machine boiler duty
OEM Branding & Configuration Available — Custom dial branding and connection thread options supplied to espresso machine manufacturers
MES Traced Production — Serial-linked quality data from raw material to shipment for full after-sale traceability

Specifications

Standard technical parameters

Dial Size	40mm, 50mm (standard espresso machine panel sizes)
Accuracy Class	Class 1.6 Full Scale
Pressure Range	0-2.5 Bar, 0-3 Bar (with 1-1.5 Bar operating band marked)
Bourdon Tube	Brass (standard) or 316L Stainless Steel
Process Connection	1/8" NPT or BSPT Bottom Entry, boiler-matched
Case Material	Chrome-Plated Brass
Window Material	Polycarbonate
Dial Marking	High-Contrast Print with Operating Range Indicator Band
Mounting Style	Front Panel Mount, boiler-fed capillary or direct connection
Operating Temperature	Up to +150°C at connection

Technical Summary

Order & production details

MOQ	1000 Pieces (Standard Range OEM Models)
Lead Time	18-22 Days (custom branding may extend timeline)
Packaging	Bulk tray packing for machine assembly lines; individual boxes for aftermarket
Certifications	ISO9001:2015, CE, RoHS Compliant
Raw Materials	H59 Brass, 316L Stainless Steel
Customization	Dial branding, operating band position, connection thread, case finish
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 espresso machine steam pressure gauge performance is mission-critical

Commercial Espresso Machine Boilers

Primary steam boiler pressure indication on café and restaurant commercial espresso machines

Prosumer Home Espresso Machines

Fitted to higher-end home espresso equipment where consistent milk texturing performance matters to enthusiasts

Espresso Machine OEM Production Lines

Supplied directly to machine manufacturers as standard boiler pressure instrumentation

Coffee Equipment Service & Repair Shops

Stocked as a replacement part for technicians servicing aging commercial espresso machine boilers

Coffee Shop Equipment Maintenance Programs

Included in scheduled maintenance checks to confirm boiler performance remains within the correct operating band

Technical Highlights & QC

Every unit validated for zero-defect performance

Operating Band Print Verification: Each dial's printed operating range band is checked against the calibrated reading to confirm exact alignment on every unit.
Thermal Cycling Test: Units are cycled through repeated heating and cooling simulating daily commercial machine boiler start-up and standby cycling.
Scale Resistance Verification: Wetted Bourdon tube material is tested against representative tap water mineral content for long-term scale resistance.
Full-Scale Linearity Sweep: Each unit is stepped through the full pressure range to verify linearity within the specified accuracy class.
High-Contrast Print Legibility Check: Dial printing is inspected for contrast and legibility to confirm quick readability during busy service conditions.
MES Serial Tracking: Range, operating band configuration, and calibration data are stored digitally against each unit's serial number.

Environment & Media Compatibility

Engineered for demanding operating environments

Continuous Daily Boiler Cycling: Movement and Bourdon tube are validated for the frequent heating and cooling cycles of daily commercial machine operation.
Mineral-Rich Water Exposure: Wetted material resists the scale buildup common in machines fed with everyday tap or lightly filtered water.
Busy Café Service Environment: High-contrast dial printing remains legible under the variable lighting and quick-glance conditions of a busy service bar.
Front Panel Heat and Steam Exposure: Case and seals withstand the ambient heat and occasional steam exposure typical of an espresso machine front panel location.
Vibration from Pump and Motor Operation: Movement construction resists reading disturbance from the espresso machine's internal pump and motor vibration.
Repeated Cleaning and Wipe-Down: Case finish withstands the frequent cleaning and wipe-down typical of daily café equipment maintenance routines.

Pro Tips for Longevity

Installation & maintenance best practices

Verify Operating Band Matches Your Machine: Confirm the printed operating band aligns with your specific machine manufacturer's recommended boiler pressure before installation.
Descale Regularly to Protect the Gauge: Follow your machine manufacturer's descaling schedule, since mineral buildup in the boiler can eventually affect gauge connection performance.
Check Pressure During Daily Opening Routine: Include a boiler pressure check in the daily café opening routine to catch a developing pressure regulator or heating element issue early.
Avoid Physical Impact to the Dial Face: Position the machine to avoid accidental impact to the front panel gauge from portafilters, cups, or cleaning tools during busy service.
Replace Rather Than Adjust a Drifting Gauge: If boiler pressure readings appear inconsistent with steam and brew performance, replace the gauge rather than attempting field recalibration.
Confirm Connection Thread Before Ordering Replacement: Verify your existing machine's boiler connection thread type before ordering a replacement gauge to ensure correct fitment.

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.
OEM Assembly Line Packaging: Bulk tray packing is available for espresso machine manufacturers integrating the gauge directly onto their assembly line.
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 range samples available within 5-7 working days for rapid machine manufacturer qualification.
After-Sales Support: Our technical team provides installation guidance and operating band specification documentation for your product literature.

About Us

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

Zhoushan Jiaerling Meter Co., Ltd. was established in 2004. It is China Espresso Machine Steam Pressure Gauge Manufacturers and Wholesale Espresso Machine Steam 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 boiler pressure is typical for a commercial espresso machine?

Most commercial single and multi-boiler machines operate between 1.0 and 1.5 Bar steam boiler pressure; consult your machine manufacturer's specification.

Does boiler pressure affect coffee extraction quality?

Yes, in heat exchanger machines boiler pressure directly influences brew water temperature at the group head, making stable pressure important for consistent extraction.

Can this gauge be fitted to any espresso machine brand?

The standard connection threads fit most common commercial and prosumer machine boiler ports; confirm your specific machine's connection size before ordering.

What causes the gauge reading to drift over time on an espresso machine?

Mineral scale buildup in the boiler and connection over time is the most common cause; regular descaling helps protect long-term gauge accuracy.

Can the operating band be customized for our machine model?

Yes, the printed operating range band position can be customized to match your specific machine's designed boiler pressure for OEM orders.

Is a stainless steel Bourdon tube available instead of brass?

Yes, 316L stainless steel is available as an option for machines using more aggressive or unfiltered water supplies.

How often should the gauge be checked for accuracy?

Include a visual and functional check as part of routine machine servicing, typically every 6-12 months for commercial equipment.

What dial size fits standard commercial espresso machine panels?

40mm and 50mm are the most common sizes matching typical commercial and prosumer machine front panel cut-outs.

Can you supply this gauge with our company's branding for OEM production?

Yes, custom dial branding is available for espresso machine manufacturers ordering in qualifying OEM quantities.

Is this gauge suitable for home prosumer machines as well as commercial units?

Yes, the same construction suits both prosumer home machines and commercial café equipment, differing mainly in case size and connection.