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Remote Reading Capillary Manometer

Remote Sensing Industry

Remote Reading Capillary Manometer

Flexible capillary tube design enables pressure readings from inaccessible or hazardous locations. Ideal for high-temperature, vibration-prone, or space-constrained industrial installations requiring display separation from the process connection point.

ISO9001:2015 CE Certified RoHS Compliant MES Traced Capillary Remote Vibration Isolated

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Product Introduction

Bridging distance and precision in pressure measurement

The Remote Reading Capillary Manometer solves one of the most persistent challenges in industrial instrumentation: how to read a pressure gauge when the measurement point is physically inaccessible, dangerously hot, or subjected to intense vibration. By connecting the process port to the display head via a precision-engineered copper or stainless steel capillary tube, the gauge dial can be positioned up to 5 meters away from the actual measurement point, allowing operators to monitor pressure in complete safety and comfort.

The capillary tube—typically ranging from 0.5 m to 5 m in standard configurations—acts as a mechanical signal transmission line. Filled with a temperature-stable hydraulic oil or glycerin compound, it faithfully transfers pressure impulses from the process connection to the Bourdon tube movement inside the display head without any electronic signal conversion, battery dependency, or wireless interference. This purely mechanical design means zero signal latency and absolute immunity to electromagnetic interference—a critical advantage in environments with heavy electrical equipment.

Our 100,000-level clean workshop ensures that the capillary tube is filled under vacuum conditions with precisely measured and degassed fill fluid. Air bubbles inside the capillary system are the primary cause of nonlinearity and pointer hesitation in lesser products. Our degassing and vacuum-fill process eliminates this issue entirely, delivering a response curve that is linear and repeatable from the first reading to the millionth. Every unit is then verified under our Advanced MES digital tracking system, with calibration data logged against the unit's serial number for complete traceability.

The display head is completely sealed and can be specified in a panel-mount, surface-mount, or flush-mount configuration, giving system designers maximum flexibility. The stainless steel capillary is armored with a PVC or stainless steel braided outer sheath for physical protection in environments where mechanical damage is a risk. The result is a manometer system that is not only more readable and safer than a direct-mount gauge, but also more durable in the harshest operating environments found in boiler rooms, refineries, and heavy manufacturing plants.

Core Advantages

Remote sensing without compromise on accuracy

5m
Max Capillary Length
±1.6%
Accuracy Class
50+
Countries Exported
  • Vibration Isolation — Capillary decouples gauge head from process vibration for stable readings
  • High-Temperature Separation — Display head kept cool while sensing extreme process temps
  • Zero Electronics — Fully mechanical; immune to EMI, power failure, and signal noise
  • Vacuum-Filled Capillary — Bubble-free fill guarantees linear, hesitation-free pointer response
  • Flexible Mounting — Panel, surface, or flush-mount display head for any control room layout
  • MES Traced Production — Serial-linked quality data from raw material to shipment

Specifications

Standard technical parameters

Dial Size2.5" (63mm), 4.0" (100mm), 6.0" (160mm)
Accuracy ClassClass 1.6% Full Scale (Class 1.0 on request)
Pressure Range0-1 Bar to 0-600 Bar (custom ranges available)
Capillary Length0.5 m, 1 m, 1.5 m, 2 m, 3 m, 5 m (standard); custom on request
Capillary MaterialCopper, 304 SS, 316L SS with PVC or SS braided armor
Process Connection1/4" NPT / BSPT, 1/2" NPT / BSPT, or custom flange
Bourdon TubePhosphor Bronze (standard) or 316L Stainless Steel
Fill FluidDegassed Glycerin or Hydraulic Oil (vacuum-filled)
Process Temperature-40°C to +200°C (fluid-dependent)
Display Head MountPanel Mount, Surface Mount, Flush Mount

Technical Summary

Order & production details

MOQ200 Pieces (Standard Capillary Length Models)
Lead Time25-35 Days (custom capillary lengths may extend timeline)
PackagingIndividual foam-lined boxes; capillary coiled and secured to prevent kinking
CertificationsISO9001:2015, CE, RoHS Compliant
Raw MaterialsH59 Brass, 304/316L SS, Phosphor Bronze, PVC / SS Braid Armor
CustomizationCapillary length, process connection type, dial range, fill fluid, case style
Port of ExportNingbo / Shanghai
Payment TermsT/T, L/C at Sight, Western Union

Our Partners

Trusted by leading brands worldwide

Industrial Applications

Wherever the measurement point and the operator cannot safely share the same space

Steam Boiler Rooms

Display head mounted at eye level on control panel while sensing high-temperature steam header pressure safely, keeping operators away from hot surfaces

Chemical Processing

Sensing corrosive or toxic media pressure at the pipe while displaying readings in a clean, accessible control room environment with no operator exposure

Heavy Machinery

Isolating the dial head from intense compressor or press vibration via flexible capillary, eliminating pointer bounce and gauge fatigue damage

Panel-Mounted Control Boards

Integrating multiple remote-sensing gauges into a centralized control panel for one-location monitoring of distributed system pressures across a plant

Confined Space Pipework

Routing capillary through tight machinery cavities where a direct-mount gauge dial would be completely unreadable or physically impossible to fit

Technical Highlights & QC

Every capillary system validated for zero-defect performance

  • Vacuum Fill Verification: All capillary assemblies are filled under controlled vacuum to eliminate air inclusions. Post-fill pressure cycling confirms complete bubble removal before the system is sealed.
  • Capillary Bend Cycle Test: Armored capillary tubes undergo 500 repeated bend cycles at minimum bend radius to confirm the armor and inner tube do not fatigue-crack or collapse under repeated flexing.
  • Linearity Sweep Test: Each unit is stepped through 10 pressure points from zero to full scale and back, verifying hysteresis remains within Class 1.6 specification throughout the full range.
  • Leak Integrity: Hydraulic pressure test at 1.5× rated pressure for a minimum of 30 minutes, followed by visual and helium-sniff inspection at all joints, ferrule connections, and the display head seal.
  • Temperature Compensation Check: Sample units from each production batch are tested at -20°C and +60°C to verify that thermal expansion of the fill fluid does not induce significant zero-point shift beyond specification.
  • MES Serial Tracking: Every unit's capillary length, fill fluid batch, calibration sweep data, and final inspection result are stored digitally against its unique serial number for full after-sale traceability.

Environment & Media Compatibility

Engineered for extreme and demanding industrial environments

  • High Process Temperature: With glycerin fill fluid, the capillary system reliably transmits pressure signals from process media up to +200°C while the display head remains at ambient temperature.
  • Vibration Immunity: The capillary tube acts as a natural mechanical low-pass filter, attenuating high-frequency pressure spikes and vibration before they reach the delicate Bourdon tube movement.
  • Corrosive Media: 316L stainless steel wetted parts (process fitting and capillary inner tube) resist attack from dilute acids, alkalis, saltwater, and many industrial solvents.
  • Outdoor & Damp Environments: IP65-rated display heads with sealed polycarbonate or tempered glass windows prevent condensation ingress in humid, outdoor, or wash-down environments.
  • Cryogenic-Adjacent Applications: Low-temperature glycerin fill formulations maintain fluid viscosity and transmission fidelity down to -40°C for cold-room and refrigeration plant installations.
  • Mechanical Damage Resistance: Stainless steel braided armor protects the capillary from crush damage, abrasion, and accidental impacts in busy plant environments.

Pro Tips for Longevity

Installation & maintenance best practices for capillary systems

  • Minimum Bend Radius: Never bend the capillary tube tighter than the specified minimum bend radius (typically 50mm for copper, 80mm for armored SS). Kinking permanently damages the inner tube and creates a leak point.
  • Avoid Capillary Tension: Route the capillary with gentle curves and secure it with soft clamps at regular intervals. Do not allow the capillary to hang under its own weight in long vertical runs—use support brackets.
  • Height Compensation: When the display head is positioned significantly higher or lower than the process connection, a hydrostatic head correction must be applied to the zero reading to account for the fill fluid column weight.
  • Process Isolation Valve: Always install a root valve between the process pipe and the capillary process fitting. This allows safe removal of the entire gauge assembly for inspection without system shutdown.
  • Protect from Sharp Edges: Where the capillary passes through metal bulkheads or cable trays, use protective grommets or conduit sleeves to prevent armor abrasion and eventual inner tube breach.
  • No Field Repair of Fill: If the capillary is breached and fill fluid is lost, the unit must be returned to factory or replaced. Field re-filling without vacuum equipment will introduce air bubbles and destroy linearity.

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 to over 50 countries.
  • Capillary-Safe Packaging: Capillary tubes are coiled to a safe radius, secured with cable ties, and placed in custom foam-cut inner boxes to prevent kinking and connector damage in transit.
  • Full Export Documentation: Commercial invoice, packing list, certificate of origin (CO), material certificates, calibration test reports, and CE declaration of conformity provided with every shipment.
  • Sample Lead Time: Standard-length capillary manometer samples available within 7–10 working days. Custom capillary length samples require 12–15 working days for production and fill.
  • After-Sales Support: Our technical team provides installation guidance, dimensional drawings, and calibration documentation to support your incoming inspection and installation teams.

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 Remote Reading Capillary Manometer Manufacturers and Wholesale Remote Reading Capillary Manometer 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

Everything you need to know before specifying or ordering a capillary manometer

How long can the capillary tube be?
Standard options are 0.5 m, 1 m, 1.5 m, 2 m, 3 m, and 5 m. Custom lengths up to 10 m are available on request. Note that longer capillaries increase the hydrostatic head correction needed and may slightly increase response lag time.
Does capillary length affect accuracy?
The capillary length itself does not affect accuracy within the rated range. However, the height difference between the process connection and the display head creates a hydrostatic offset that must be zeroed out during installation if significant.
Can the capillary be cut or extended in the field?
No. The capillary is a sealed, vacuum-filled system. Cutting or splicing it in the field will cause fill fluid loss and air ingress, destroying the measurement performance. Please specify the exact required length at the time of order.
What fill fluid is used inside the capillary?
Standard models use degassed glycerin. For food-processing or high-temperature applications, food-grade silicone oil or mineral oil fill fluids are available. Please specify the process temperature and any food-contact requirements when ordering.
How is the display head mounted?
The display head is available in panel-mount (hole-in-panel with front flange), surface-mount (back stud on wall or bracket), and flush-mount configurations. Mounting hardware and dimensional drawings are provided with every shipment.
Is the capillary process fitting interchangeable?
The process fitting is assembled and sealed at the factory as part of the filled system. Connection thread type (NPT, BSPT, DIN) must be specified at order time. Field swapping of the process fitting is not possible without breaking the sealed system.
Can this gauge measure vacuum or negative pressure?
Yes. Compound ranges (e.g., -1 Bar to +9 Bar) are available. The vacuum portion of the scale is measured using the same Bourdon tube principle in reverse. Please specify compound range requirements when ordering.
What certifications are available?
Standard certifications include ISO9001:2015, CE (for EU market compliance), and RoHS. ATEX-certified versions for hazardous area (Ex zone) installation are available on request for petrochemical and mining applications.
Is the armor sheath mandatory?
The PVC outer sheath is standard on all models. Stainless steel braided armor is recommended for applications where the capillary may be exposed to mechanical abrasion, foot traffic, or sharp metal edges. It can be specified at no significant cost premium.
What is the response time of the capillary system?
Response time is typically under 1 second for lengths up to 2 m and under 2–3 seconds for 5 m lengths, depending on fill fluid viscosity. For rapid transient pressure monitoring, a direct-mount gauge is more appropriate than a long capillary system.

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