If you closed your eyes and pictured a float switch – I’d wager you imagine the Key from Mac3.

The Key is a solid and straightforward float switch, with the expected attention to detail you would expect from Mac3. Simply put, they work! There isn’t much I can say about these other than these blue and yellow float switches are a familiar fixture on OEM float-switched pumps worldwide.

The Key is available in PVC and H07RN-F cable types, in 2, 5, 10, 15 and 20m lengths. The Key is installed with a counterweight on the cable or with the cable restrained to a pump or internal fixture of a tank installation.

Where the Key Clean Water Float Switch can be Installed

The Key is suitable for use with a tank level controller, pump float switch modification or a complete tank and pump control system.

The Key is particularly suitable as a hardware dry-run protection measure. The Key, wired directly into the mains feed to a pump (with an IP68-rated connector) or using a junction box outside the tank, will isolate the pump when the water level drops below the level set at installation. Using the Key for dry-run protection is particularly useful with centrifugal pumps (as they will require re-priming if they run dry) or when using a submerged pump that requires immersion for cooling.

Conversely, the Key can be employed as part of a top-up system for filling the tank or simply as tethered float switch – positioned at the maximum required level of the tank itself. It can then either be wired into a controller for a manual pump or wired into an automatic pump.

The Key is a nigh-on universal float switch for clean water applications and certainly worth keeping in mind when replacing a failed float switch in situ.

For more information

Contact Jim, our Mac3 Technical lead. Jim and Tom have over 25 years of experience in Water Control Systems.

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Mac3 Float Switch – Original

The original Mac3 is a simple but well-designed float switch for use primarily in clean water – but with its streamlined shape, is also suitable in water containing small amounts of suspended solids.

The flagship of the Mac3 float switch line, simply put – it just works! The Mac3 takes a float switch and refines the concept. There are no corners or sharp edges that can get caught on obstructions inside a tank or ragging points that cause irregular movement through a liquid. The polypropylene construction is both hardwearing and resistant to most fluids it is likely to encounter. Available in both the standard PVC and H07RN-F (rubber) cable types, the Mac 3 can be installed in almost any environment.

Mac3 Float Switch – the “go-to” for clean water pump protection

If I’m designing a pump setup, my first instinct is to reach for the Mac3! Then the only decision to make is the cable length and material (the go-to on my list would be the 2 meter, H07RN-F with a counterweight – MGM0206GB0C). With one of these, I can be sure that it will work in just about any situation that doesn’t require something a little more specialised.

The Mac3 can be installed as part of a controller installation (level or process control) or for dry-run protection on a pump. When wiring the Mac3 directly into a pump, I’d recommend using an IP68-rated T-joint connector (always in stock) to be sure there are no problems with the integrity of the connection. Though, there is no reason (if a suitable cable length is used) that the connection cannot be outside of the tank- with the Mac3 then being run into the tank itself.

For more information

Contact Jim, our Mac3 Technical lead. Jim and Tom have over 25 years of experience in Water Control Systems.

The post Mac3 Float Switch – The Original appeared first on Mac 3 UK.