Hastelloy Magnetic Level Gauge

The Hastelloy Magnetic Level Gauge is a side-mounted, high-performance level and interface measurement instrument engineered for the most aggressive and corrosive process environments in the chemical, pharmaceutical, and specialty processing industries. Built on the same reliable communicating-tube and magnetic float principle used in our stainless steel magnetic level gauges, this version replaces standard wetted materials with Hastelloy C-276 (or Hastelloy C-22 on request) for the chamber pipe, flanges, and float - giving it exceptional resistance to chlorides, sulfuric acid, hydrochloric acid, wet chlorine, and other highly oxidizing or reducing media that would rapidly degrade 304/316L stainless steel construction.

Where a standard stainless steel magnetic level gauge is suitable for general corrosive service, the Hastelloy Magnetic Level Gauge is purpose-built for extreme corrosion applications - offering low installation, maintenance, and lifecycle cost even in the harshest chemical duties, without sacrificing the safety, accuracy, and pressureless-float reliability that defines our magnetic level gauge range.

Superior corrosion resistance versus stainless steel and titanium
Hastelloy C-276 offers markedly better resistance to pitting, crevice corrosion, and stress-corrosion cracking than 304 or 316L stainless steel, particularly in chloride-rich, acidic, or oxidizing-reducing mixed-media services. For interface and level measurement in aggressive chemical streams, Hastelloy outperforms standard wetted materials where stainless steel would show accelerated attack.

Wide chemical compatibility
Suited to hydrochloric acid, wet chlorine gas, ferric chloride, sulfuric acid at varying concentrations, seawater, and other halide-bearing or highly oxidizing media commonly found in chemical processing, flue gas desulfurization, and pharmaceutical intermediate production.

Long-term reliability reduces total cost of ownership
Although the raw material cost of Hastelloy is higher than stainless steel, its extended service life in corrosive duty significantly reduces unplanned shutdowns, float replacement frequency, and maintenance labor - lowering the true lifecycle cost compared to stainless steel gauges that require frequent inspection or replacement in the same service.

Consistent, pressureless float performance regardless of material
The corrosion-resistant Hastelloy float retains the same pressureless, non-magnetically-guided design as our stainless steel float - meaning the switch to Hastelloy construction does not compromise measurement accuracy, response time, or reliability.

• Fully Hastelloy-wetted construction - chamber pipe, process connection flanges, and float manufactured in Hastelloy C-276/C-22 for maximum resistance to chloride pitting, crevice corrosion, and stress-corrosion cracking
• Standard pressureless float system - float operates without mechanical or magnetic guides, minimizing wear and mechanical failure points
• Fully corrosion-resistant system - every wetted component, not just the float, is specified in Hastelloy for consistent chemical resistance throughout the measuring chamber
• Unaffected by pressure, vacuum, temperature, foam, and viscosity - reliable indication across demanding process conditions
• Extremely low sensitivity to density changes - suitable for interface applications with small density differentials
• Permanent visual display without external power supply - safe, passive indication ideal for hazardous or corrosive-area installations
• Low-temperature version available with anti-icing indicator
• Fully adjustable switch options for high/low level alarms and pump control
• No backlight required - double-sided red/white flap or column ensures clear visibility in daylight or low-light conditions
• Eccentric drain outlet prevents float clogging during drainage
• Code-certified welding on all pressure-retaining joints, ensuring weld integrity appropriate for demanding chemical service

Below are full technical parameters of our Hastelloy bypass magnetic level indicator, specially customized for severe corrosive process environments. All alloy materials, pressure ratings and temperature limits are listed for your accurate model selection.

The Hastelloy Magnetic Level Gauge is specified where standard stainless steel or titanium wetted parts cannot withstand the process chemistry. Typical applications include:

• Chemical processing plants - hydrochloric acid, sulfuric acid, mixed acid, and oxidizer-bearing streams
• Chlor-alkali and chlorine handling systems - wet chlorine gas and hypochlorite service
• Flue gas desulfurization (FGD) systems - chloride-concentrated scrubber liquor level and interface monitoring
• Pharmaceutical and fine chemical intermediate production - high-purity, corrosive reagent handling
• Seawater and brine handling systems - desalination, offshore, and marine process equipment
• Metal pickling and surface treatment lines - acid bath level control
• Any process where 316L stainless steel has shown pitting, crevice corrosion, or stress-corrosion cracking in service

Q1: What is the difference between the Hastelloy Magnetic Level Gauge and the Stainless Steel Magnetic Level Gauge?
The core operating principle, dimensions, and technical parameters are the same. The key difference is the wetted material: the Hastelloy version uses Hastelloy C-276 (or C-22) for the chamber pipe, flanges, and float instead of 304/316L stainless steel, giving it far superior resistance to chloride pitting, crevice corrosion, and stress-corrosion cracking in aggressive chemical media.

Q2: When should I choose Hastelloy over 316L stainless steel or titanium?
Choose Hastelloy when the process medium contains high chloride concentrations, strong acids (especially hydrochloric or mixed acids), wet chlorine, or other oxidizing/reducing combinations known to cause rapid corrosion of stainless steel. If 316L or titanium gauges have previously failed or shown pitting in your service, Hastelloy is typically the recommended upgrade.

Q3: Does the Hastelloy construction affect measurement accuracy?
No. The float remains a pressureless, non-magnetically-guided design - measurement accuracy, response to level changes, and reliability are unaffected by the material change. Only the corrosion resistance profile is improved.

Q4: Can the Hastelloy gauge be used for interface measurement?
Yes. As with the standard stainless steel version, the Hastelloy Magnetic Level Gauge supports interface applications where the density difference between the two media is ≥ 0.2 kg/dm³.

Q5: What operating pressure and temperature range does the Hastelloy Magnetic Level Gauge support?
It supports the same range as the standard product line: operating pressure up to 250 bar and operating temperature from -40°C to +400°C, depending on flange class and gasket selection.

Q6: Are switches and transmitters available on the Hastelloy version?
Yes. Fully adjustable magnetic switches for high/low level alarm and pump control, as well as reed transmitters with standard 4-20 mA output, are compatible with the Hastelloy Magnetic Level Gauge.

Q7: Is Hastelloy C-22 available instead of C-276?
Yes, Hastelloy C-22 is available on request for applications requiring even higher resistance to localized corrosion in certain oxidizing chloride environments.

Get a Customized Quote for Your Application

Every process condition is different - and material selection is critical when it comes to protecting your level gauge investment and ensuring long-term, trouble-free operation. Whether you're dealing with high-chloride media, strong acids, or other aggressive process chemistry, our engineering team can help you confirm whether Hastelloy C-276, Hastelloy C-22, or an alternative alloy is the right fit for your specific pressure, temperature, and media conditions.

Send us your process parameters - medium, density, operating pressure, operating temperature, and required measuring range - and we'll provide a tailored technical proposal and quotation within 24 hours. For urgent projects or applications with unusual corrosion challenges, our specialists are also available for direct technical consultation.

Contact us today to discuss your Hastelloy Magnetic Level Gauge requirements.

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