Alpco Industrial EU
Level Measurement Solutions

PED Certified Magnetic Level Gauges & Armored Glass Level Indicators

Non-intrusive level measurement systems utilizing magnetic float technology and reflex glass gauges for safe, accurate liquid level indication in tanks, pressure vessels, boilers, and process equipment across demanding industrial applications.

Reliable Industrial Level Measurement Without Process Contact

Liquid level gauges are essential instrumentation for continuous monitoring of fluid inventories in industrial vessels. Our portfolio encompasses two complementary technologies: magnetic level indicators utilizing bypass chamber principles, and armored glass level gauges providing direct visual observation through reflex or transparent glass sections.

These level measurement solutions eliminate the safety risks and maintenance burdens associated with traditional direct-reading glass tube gauges, while delivering superior accuracy and operational reliability in high-pressure, high-temperature, and corrosive service conditions.

🛡️

Enhanced Operator Safety

Sealed bypass chambers and armored construction isolate operators from hazardous process fluids at extreme pressures and temperatures.

⚙️

Zero Power Requirements

Magnetic and reflex glass technologies operate purely mechanically—no electrical power needed for continuous level indication.

📐

Exceptional Accuracy

Readings unaffected by process fluid optical properties, refractive indices, color changes, or ambient lighting conditions.

🔧

Minimal Maintenance

Rugged construction with no glass-to-process contact reduces fragility and extends service life in demanding applications.

PED certified magnetic level gauge indicator with bypass chamber and bi-color flag display for industrial vessel level measurement

Magnetic Level Gauge & Glass Level Indicator Portfolio

From magnetic bypass indicators for extreme conditions to armored glass gauges for direct visual observation.

🧲

Magnetic Level Indicators

Bypass chamber systems utilizing magnetic float assemblies that transmit level position through non-magnetic chamber walls to external flag or follower indicators.

  • Magnetic flag or follower indication types
  • Internal standpipe or external bypass chamber
  • Stainless steel, PVC, CPVC, polymer-lined options
  • Flanged or threaded mounting configurations
  • Pressure ratings: 10-62 bar (150-900 psi)
  • Connection sizes: DN15 to DN80 (1/2" to 3")
  • Imperial or metric scale graduations
  • Optional transmitters for 4-20mA output
💎

Reflex Glass Level Gauges

Armored flat glass assemblies utilizing prismatic reflex glass that displays liquid as black and vapor as silver-white through light refraction principles.

  • Prismatic borosilicate reflex glass
  • High-contrast liquid/vapor interface
  • Visible from substantial distances
  • No backlighting required
  • Pressure ratings up to 275 bar (4000 psi)
  • Temperature ratings: -20°C to +400°C
  • 316 stainless or carbon steel construction
  • Ideal for clean, non-fouling liquids
🔍

Transparent Glass Level Gauges

Dual-glass armored assemblies with transparent flat glass sections on both sides of the liquid chamber for color and clarity observation.

  • Dual transparent glass construction
  • True liquid color visualization
  • Interface level detection capability
  • Optional mica or PTFE shields
  • Pressure ratings up to 414 bar (6000 psi)
  • Backlighting for enhanced visibility
  • Suitable for corrosive media
  • Multiple section assemblies available
♨️

High-Pressure Steam Gauges

ASME-compliant reflex borosilicate glass gauges specifically engineered for steam service with water appearing black and steam displaying white.

  • ASME Section 1 PG.60 compliant
  • Reflex prism glass technology
  • Pressure ratings up to 207 bar (3000 psi)
  • High-temperature coatings and hardware
  • Continuous one-piece chamber design
  • Optional illuminators (amber/red-green)
  • Multiple section configurations
  • Spring washers for consistent torque

Magnetic Level Gauge Technology

Understanding the contactless magnetic coupling principle that enables safe, accurate level measurement.

Bypass Chamber Configuration

A vertical bypass chamber constructed from non-magnetic stainless steel or polymer is connected to the vessel via top and bottom process connections. Process fluid flows freely into the chamber, establishing identical level as the main vessel.

Magnetically-Coupled Float

An internal float containing permanent magnets rides on the liquid surface within the bypass chamber. Float specific gravity is calibrated to the process fluid density to ensure accurate buoyancy and positioning.

External Indication Coupling

Magnetic fields from the float penetrate the non-magnetic chamber wall, actuating external flag indicators or followers. As liquid level changes, the float rises or falls, magnetically driving the external indicator to display the corresponding level position.

Fail-Safe Operation

The magnetic coupling principle operates without electrical power and remains functional during power outages. Indicators are magnetically stabilized to resist vibration-induced errors and provide reliable readings in dynamic process conditions.

Technical Specifications

Performance parameters for magnetic indicators and armored glass level gauge systems.

Magnetic Level Indicators

Chamber Material
316/316L Stainless Steel
Standpipe Materials
SS, PVC, CPVC, PVDF-lined
Float Material
316 SS, Titanium, PTFE
Indicator Type
Flag, Follower, Scale
Pressure Range
10-62 bar (150-900 psi)
Temperature Range
-40°C to +400°C
Mounting
Flanged, NPT, BSP
Connection Size
DN15-DN80 (1/2"-3")

Reflex Glass Gauges

Glass Type
Borosilicate (prism)
Body Material
Carbon/316 SS
Max Pressure (Low)
69 bar @ 38°C (1000 psi)
Max Pressure (Med)
138 bar @ 38°C (2000 psi)
Max Pressure (High)
275 bar @ 38°C (4000 psi)
Temperature Rating
-20°C to +400°C
Connections
NPT 1/2", 3/4"
Viewing Length
127-1524mm (5"-60")

Transparent Glass Gauges

Glass Type
Borosilicate (flat)
Protection Shields
Mica, PTFE (optional)
Max Pressure
414 bar @ 38°C (6000 psi)
Temperature Rating
Up to 427°C (800°F)
Illumination
Optional backlighting
Applications
Interface, corrosive media
Chamber Design
One-piece continuous
Gasket Material
Non-asbestos, graphite

Standards & Compliance

Pressure Equipment
PED 2014/68/EU
Piping Standards
ASME B31.1 / B31.3
Steam Service
ASME Section 1 PG.60
Material Certs
EN 10204 3.1 / 3.2
Flanges
DIN, ANSI, JIS
Glass Standards
DIN 7080, DIN 7081
Welding Quality
EN ISO 3834
Corrosion Resistance
NACE MR-0175/MR-0103

Magnetic Level Gauge Applications Across European Industries

Providing reliable liquid level indication in Europe's most demanding process environments.

🏭

Chemical Processing

Storage tank level monitoring, reactor inventory tracking, and corrosive media measurement.

Oil & Gas

Separator level control, storage vessel measurement, and offshore platform applications.

🔥

Power Generation

Boiler drum water level indication, feedwater deaerator monitoring, steam systems.

💊

Pharmaceutical

Bioreactor level measurement, buffer tank monitoring, solvent storage indication.

🍺

Food & Beverage

Fermentation vessel levels, storage tank inventory, ingredient holding tanks.

🌊

Water Treatment

Clarifier level control, storage reservoir monitoring, chemical dosing tanks.

⚗️

Specialty Chemicals

Batch reactor levels, polymer storage, solvent recovery systems.

🧪

Petrochemical

Distillation column levels, product storage, high-pressure separators.

Request a Magnetic Level Gauge Quote

Our technical specialists provide application-specific level gauge selection, float sizing calculations, and material compatibility recommendations for European industrial installations.