Life Expectancy of a Magnicator: How Long Do They Last?

How long will a Magnicator actually last? The answer is straightforward: if properly installed and maintained, there is no expected end-of-life. Jerguson has documented Magnicators in continuous service since the 1990s that are still working as designed today — 30+ years of reliable operation.

Why Magnicators Last So Long

Magnicators succeed at longevity because of their simple design. The entire operating mechanism consists of three parts: a float inside a sealed chamber, a magnet in the float, and an external indicator. That's it.

The key difference: The external indicator never physically touches the float. The magnetic coupling is the only interface. Since magnets don't wear out and there are no mechanical linkages (springs, gears, pivot points), there are no wear surfaces to fatigue or fail.

Most other level gauges rely on mechanical connections that eventually fatigue. A Magnicator eliminates this wear mechanism entirely.

Materials matter too. Jerguson Magnicators use stainless steel (Type 304 or 316) construction, which resists corrosion and degradation for decades. The external indicator is sealed-for-life with no exposed seals to degrade from temperature cycling or vibration.

What Needs Maintenance

The Magnicator itself requires almost nothing. The chamber it's installed in is another story.

Chamber Cleaning:

Foreign matter — scale, sediment, corrosion products — accumulates inside the chamber over time. This doesn't damage the Magnicator; it just restricts float movement.

Cleaning Procedure:

1. Close upper and lower isolation valves

2. Open drain valve at bottom

3. Flush until water runs clear

4. Close drain valve

5. Slowly reopen isolation valves (upper first)

How Often?

• Clean water systems: Semi-annually or annually

• Normal boiler feedwater: Quarterly

• Dirty service or high-sediment systems: Monthly

This is basic maintenance — no replacements, no parts, just flushing sediment.

Magnicator vs. Glass Gage

Aspect	Magnicator	Glass Gage
Expected Life	Indefinite (30+ years)	5-15 years
Float/Glass Replacement	Rare/Never	Every 3-5 years typical
Indicator Replacement	Almost never	Never needed
Maintenance	Chamber cleaning	Blowdown, cleaning, gasket replacement

Over two decades, Magnicators require far less maintenance and replacement than glass gages.

When Replacement IS Needed

Float is crushed (improper startup)

• This happens when operators open isolation valves too quickly during commissioning

• Prevention: Follow proper startup procedure (open upper valve first, then slowly open lower valve)

Magnet loses strength (extremely rare)

• Only documented after 40+ years or extreme temperature exposure

• External indicator would show sluggish response

Chamber is damaged (not the Magnicator's fault)

• Damage is on the vessel side, not the indicator

• Magnicator can be transferred to new chamber

Real expectation: 95% of installed Magnicators will never require replacement.

Best Practices for Maximum Life

1. Follow startup procedures — Prevents float crushing

2. Perform regular chamber cleaning — Prevents sediment buildup

3. Use isolation valves correctly — Allows safe maintenance

4. Monitor indicator response — Watch for sluggish movement (sign of sediment)

5. Use treated water when possible — Reduces scale

   
   

Real-World Example

A chemical processing facility installed a Jerguson Magnicator in 1992. The unit operated continuously for 30+ years. The only maintenance performed was periodic chamber flushing. The original float, magnet, and indicator still function as designed. Zero component replacements were needed.

This is typical for well-maintained Magnicators.

Learn More

For specific maintenance guidance on your Magnicator, refer to the Installation, Operation & Maintenance (IOM) instructions. Clark-Reliance technical staff can provide support for your specific application.

📧 sales@clark-reliance.com📞 +1 (440) 572-1500