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Product Introduction

Precision instrumentation engineered for coffee machine extraction pressure gauge applications

The Coffee Machine Extraction Pressure Gauge monitors pressure at the group head during the actual extraction, a fundamentally different reading from the boiler steam gauge most machines display, since group head pressure reflects the real resistance the coffee puck presents to the pump, including any channeling, uneven tamping, or grind inconsistency that a boiler gauge simply cannot reveal. This makes the extraction gauge a genuine diagnostic and training tool rather than a simple status indicator, letting baristas watch pressure build, peak, and decline through the shot in real time.

Because extraction pressure changes rapidly within the first few seconds of a shot as the pump ramps and the puck saturates, the movement is designed with a fast dynamic response and minimal damping compared to a typical boiler gauge, so the pointer sweep genuinely tracks the pressure curve rather than lagging behind it and smoothing over the very channeling and flow irregularities the gauge exists to reveal. Wetted components are selected for compatibility with hot, slightly acidic coffee-extraction water at the elevated brew pressures modern espresso machines commonly use.

Every gauge is assembled and calibrated in our 100,000-level clean workshop, with dynamic response verified against a reference pressure profile that simulates a real extraction curve rather than a simple static pressure check, since a gauge that calibrates correctly at steady-state but lags during a rapid ramp would defeat the instrument's diagnostic purpose. Calibration and dynamic response test data for every unit are logged in our Advanced MES digital tracking system against its serial number.

The gauge is available for direct group head fitting on machine manufacturer production lines, as well as an aftermarket portafilter-integrated version that baristas and trainers can move between machines to profile extraction pressure on any compatible group head, supporting both OEM instrumentation and hands-on barista training programs.

Core Advantages

Engineered for reliability where it matters most

0–12 Bar

Extraction Pressure Range

±2%

Accuracy Class

Fast Response

Minimal-Damping Dynamic Movement

Real Extraction Pressure Reading — Reads actual group head pressure the coffee puck experiences, revealing channeling and grind issues a boiler gauge cannot show
Fast Dynamic Response Movement — Minimal damping lets the pointer genuinely track the rapid pressure ramp and peak of a real extraction curve
Extraction-Water Compatible Wetted Parts — Materials selected for compatibility with hot, slightly acidic brew water at elevated modern extraction pressures
Curve-Profile Calibration Testing — Dynamic response verified against a simulated extraction pressure profile, not just a static steady-state check
OEM and Portafilter-Integrated Options — Available for direct machine production line fitting or as a movable barista training and profiling tool
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 (group head and portafilter-integrated versions)
Accuracy Class	Class 2 Full Scale (Class 1.6 on request)
Pressure Range	0-12 Bar (covers standard and high-pressure extraction profiles)
Bourdon Tube	Brass or 316L Stainless Steel, extraction-water rated
Dynamic Response	Minimal-Damping Movement for Fast Curve Tracking
Process Connection	Group Head Standard Thread or Portafilter-Integrated Fitting
Case Material	Chrome-Plated Brass
Window Material	Polycarbonate
Mounting Style	OEM Group Head Fitting or Portable Portafilter Attachment
Operating Temperature	Up to +100°C at connection

Technical Summary

Order & production details

MOQ	500 Pieces (Standard OEM Group Head Models)
Lead Time	20-25 Days (dynamic response curve calibration process)
Packaging	Bulk tray packing for OEM lines; individual boxes for portafilter aftermarket units
Certifications	ISO9001:2015, CE, RoHS Compliant
Raw Materials	H59 Brass, 316L Stainless Steel
Customization	Connection fitting type, dial branding, pressure range, response damping level
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 coffee machine extraction pressure gauge performance is mission-critical

Espresso Machine OEM Group Heads

Fitted directly to machine group heads by manufacturers offering built-in extraction pressure diagnostics

Barista Training Programs

Portafilter-integrated version helps trainers visually demonstrate the effect of tamping, dosing, and grind on shot pressure

Specialty Coffee Shop Quality Control

Used by quality-focused cafés to verify consistent extraction pressure across multiple group heads and shifts

Espresso Machine R&D and Testing

Supports equipment manufacturers profiling pump and flow control performance during new machine development

Coffee Competition Preparation

Competitive baristas use the diagnostic gauge to fine-tune dosing and tamping technique ahead of competition

Technical Highlights & QC

Every unit validated for zero-defect performance

Simulated Extraction Curve Calibration: Dynamic response is verified against a reference profile simulating a real pressure ramp, hold, and decline, not just static pressure.
Damping Level Verification: Each movement's damping is checked to confirm it stays within the minimal-lag specification required for genuine curve tracking.
Extraction-Water Compatibility Test: Wetted materials are tested against representative hot, slightly acidic coffee extraction water for long-term compatibility.
Portafilter Fitment Test: Portable versions are test-fitted to common portafilter baskets and spouts to confirm secure, repeatable attachment.
Full-Scale Linearity Sweep: Each unit is stepped through the full pressure range to verify linearity within the specified accuracy class.
MES Serial Tracking: Response profile test results, connection type, and calibration data are stored digitally against each unit's serial number.

Environment & Media Compatibility

Engineered for demanding operating environments

Rapid Pressure Ramp Conditions: Movement is specifically validated for the fast pressure changes that occur within the first few seconds of an espresso shot.
Repeated Daily Shot Cycling: Construction tolerates the high shot-count cycling typical of busy specialty coffee shop daily service.
Hot, Slightly Acidic Brew Water: Wetted materials resist the mild acidity and elevated temperature characteristic of coffee extraction water.
Portable Handling Between Machines: Portafilter-integrated versions are built to tolerate repeated attachment, removal, and transport between different machines.
Busy Bar Counter Environment: Case construction withstands the incidental knocks and quick handling typical of an active espresso bar service counter.
Training and Demonstration Handling: Robust movement withstands the more frequent handling typical of a shared training tool used by multiple students.

Pro Tips for Longevity

Installation & maintenance best practices

Interpret the Full Curve, Not Just Peak Pressure: Watch how pressure builds and holds through the shot, not just the peak reading, to properly diagnose channeling or grind issues.
Compare Readings Across Multiple Shots: Pull several consecutive shots when diagnosing an issue, since a single reading may not represent typical puck behavior.
Clean the Portafilter-Integrated Version After Each Use: Rinse and clean the portable unit after each training session to prevent coffee oil buildup from affecting long-term movement performance.
Use Consistent Dosing When Comparing Results: Keep dose weight and tamping technique consistent between test shots to isolate the variable you are actually diagnosing.
Confirm OEM Fitment Before Production Integration: Verify the group head connection specification matches your machine design before committing to a production integration order.
Store Away from Extended Heat Exposure: Store portable units away from extended direct heat exposure when not in active use to protect long-term calibration stability.

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 and Retail-Ready Packaging: Bulk tray packing for manufacturer production lines or individual retail-style boxes for portafilter aftermarket sales.
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 configuration samples available within 7-10 working days given the dynamic response calibration process.
After-Sales Support: Our technical team provides fitment drawings and dynamic response documentation to support your OEM integration or training program.

About Us

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

Zhoushan Jiaerling Meter Co., Ltd. was established in 2004. It is China Coffee Machine Extraction Pressure Gauge Manufacturers and Wholesale Coffee Machine Extraction 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

How is this different from the boiler pressure gauge on my machine?

The boiler gauge shows steam boiler pressure only; this gauge reads actual group head extraction pressure, which reflects puck resistance and flow behavior.

What pressure should a normal espresso shot show?

Traditional extraction targets around 9 Bar at the group head, though many modern profiling machines vary pressure deliberately through the shot.

Can this gauge be retrofitted to an existing machine?

OEM group head fitting requires manufacturer integration; the portafilter-integrated version can be used on any machine with a compatible portafilter.

Why does the gauge need a fast dynamic response?

A slow, heavily damped movement would smooth over the rapid pressure changes that actually reveal channeling and grind issues during the shot.

Can this help diagnose channeling in my espresso puck?

Yes, an irregular or rapidly fluctuating pressure curve during extraction is a common indicator of channeling through the coffee bed.

Is the portafilter-integrated version compatible with all portafilter sizes?

Common 53mm, 54mm, and 58mm portafilter fitments are available; confirm your specific basket and spout configuration when ordering.

How is the gauge calibrated given its fast-response requirement?

Calibration includes verification against a simulated extraction pressure profile, not just a single static pressure check.

Can this be used for barista training and competitions?

Yes, it is widely used by trainers and competitive baristas to visually demonstrate and fine-tune the effect of technique on extraction pressure.

What maintenance does the gauge require?

Regular rinsing to prevent coffee oil buildup is the main maintenance requirement, along with periodic calibration verification for critical use.

Can machine manufacturers get this gauge with custom branding?

Yes, OEM dial branding and connection customization are available for qualifying espresso machine manufacturer order quantities.