The Key Clean Water Float Switch– unlocking a simple float switch for any clean water installation.
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.
