Magnetic Separator Specifications: Gauss Rating, Housing, and What to Check Before You Buy

A magnetic separator spec sheet looks simple compared to most process equipment — a handful of numbers instead of pages of parameters. But those few numbers matter a great deal, and the most important one, Gauss rating, is also the one buyers most often accept on faith rather than verify. Here's what to actually check.

Confirm the Configuration First

Grate magnet separators sit built into a chute, hopper outlet, or gravity-fall drop point — the right fit for retrofitting into an existing material path. Drawer magnets house the bars in a slide-out cassette for frequent inspection and cleaning. See ENZAC's grate vs drawer comparison if you haven't settled this yet — the specification requirements below apply to both.

Core Specification — What ENZAC Supplies

ENZAC's magnetic separators are supplied to the following baseline specification, drawn from recent project scope:

What Each Spec Actually Means for You

Magnet strength (Gauss rating) is the single most important number on the sheet, and it's also the one most commonly specified as a minimum threshold by buyers in regulated industries — a requirement of greater than 10,000 Gauss is a common baseline in food processing, driven by internal QA standards or customer/export audit requirements. ENZAC's standard supply at 12,000 Gauss sits comfortably above that threshold. Don't accept a Gauss figure on a spec sheet at face value — see the calibration section below for how to verify it's real.

Operating temperature (below 80°C) matters because magnet strength itself is temperature-sensitive — permanent magnets lose field strength as they approach their thermal limit, and that loss can be permanent if the magnet is exposed to excessive heat. Confirm your actual process temperature at the installation point against this limit before specifying, particularly for applications near dryers, extruders, or other heat-generating equipment upstream.

Housing material (SS304) is the standard for food, chemical, and general industrial applications where the housing contacts product or is exposed to washdown. SS316 may be specified instead where higher corrosion resistance is needed — chloride exposure, aggressive cleaning chemicals, or coastal/humid installation environments — worth raising with your supplier if your process involves any of these.

Connection type (flange) determines how the separator integrates into your existing chute or pipework. Flange connections are the standard for both new-build and retrofit installations, but confirm flange size and standard (ANSI, DIN, or a custom match to your existing chute geometry) before ordering — this is frequently a site-specific detail that a generic spec sheet won't capture, and a mismatch here becomes a fabrication or installation delay later.

The Spec Sheet Won't Tell You This: Verified vs. Claimed Gauss Rating

A magnet's actual field strength should be verified with a calibrated Gauss meter against traceable reference standards — in Malaysia, this typically means an NMIM (National Metrology Institute of Malaysia)-traceable calibration, often performed through SIRIM. A magnet rated 12,000 Gauss on a spec sheet with no calibration certificate behind it is a claim, not a verified figure — and magnetic strength can weaken over the life of the unit, which is exactly why calibration matters as an ongoing requirement, not a one-time check at purchase. Confirm with your supplier whether an NMIM Gauss Calibration Certificate is available, and what the lead time is to obtain one — this is covered in detail on ENZAC's Magnetic Separator equipment page.

What's Missing From a Bare Spec Sheet

Number of units and installation points. A single magnetic separator protects a single process point. Multi-stage processes with several mechanical handling steps — grinding, milling, holding silos, packing — typically need magnets at each point where wear debris or contamination can enter, not just one installed somewhere convenient. Map your process flow before finalising unit count.

What a magnet can't catch. Magnetic separators capture ferrous material only — stainless steel and non-ferrous metals pass through a magnetic field largely unaffected. If your contamination risk includes stainless steel fragments, pair the separator with a metal detector rather than relying on magnetic separation alone.

Review the full Magnetic Separator equipment page for configuration and specification detail — also see ENZAC's Metal Detector page for related inline contamination detection.