521 Plus Tab by Coil Master

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6 reviews

 Coil Master 521 Plus Tab

The Coil Master 521 Plus Tab is an elite multi-functional ohm-meter that continues the previous generation of highly regarded tab systems, featuring accurate coil resistance measurement, spacious rebuildable space with dry burning capability, and battery output voltage testing. A further extension of Coil Master's manufacturing prowess, the new 521 Plus Tab integrates a fire resistant ABS and Zinc Alloy construction on a newly designed chassis. Powered by a single or dual 18650 battery (sold separately), the 521 Plus Tab A three way selector offers dual mode capability: Ohm Reader Mode and Fire Burning Mode. In Ohm Reader Mode, the 521 Plus Tab easily and accurately test the resistances of coils and atomizers with a range of 0.03ohms to 9.99ohm. In Fire Burning Mode, the 521 Plus Tab is capable of dry burning atomizers on its spacious rebuildable space, giving builders live feedback on resistance levels. It is also equipped with 2 hole connectors for the included Voltage Checker, measuring the voltage range of your mechanical mod for additional information. An overall game-changer with a modernized structure, the Coil Master 521 Plus Tab is the most comprehensive rebuildable accessory tool for dedicated builders.

Coil Master 521 Plus Tab Features:

  • Dimensions: 130mm by 130mm by 30mm
  • Single or Dual 18650 Battery Compatible - Not Included
  • ABS & Zinc Alloy Housing Construction
  • Three Way Selector - Off, Fire Mode, Ohm Reader Mode
  • Elite Ohm Reader
  • Test-Fire Capability
  • Dry Burn DIY Coils
  • Battery Output Voltage Testing
  • Spacious Coil Rebuilding Deck
  • Intuitive LED Screen - Resistance Level Indicator
  • Resistance Measurement Range: 0.03-9.9ohm
  • Resistance Rate: 0.1ohm
  • Reverse Battery Protection
  • Short Circuit Protection
  • Automatic Power Off Protection
  • USB Port - Charging Capability
  • Spring-Loaded Gold-Plated 510 Connection


  • 1 521 PLUS Tab
  • 1 Voltage Meter Tool
  • 2 Alligator Clips
  • 1 MicroUSB Cable
  • Instructional Manual

This product is for advanced users only. It consists of risk of damaging your mods, devices, and batteries if it is being used improperly. Please make sure that you have great understanding and have done researches on this product before purchasing.

Note: When it comes to using RDA, RTA, and RDTA, we strongly recommended to wash and clean all the atomizers thoroughly and carefully. Likewise, please have a great sense of knowledge when it comes to handling and using these products.

We always strongly recommend testing the coils with ohm-meter before using them with your mods, devices and batteries. Coils with low resistance are not suitable with all mods, devices and batteries. Please make sure that your mods, devices and batteries can handle low resistance before using them.

Note: There is always an inherent risk when using any rechargeable batteries at anytime and under any circumstances. myvpro.com and any of myvpro.com’s parent and subsidiary companies are not held responsible for any damage for any modification of the batteries, chargers, devices and other products that we carry in any form or shape, this is including pack making.

myvpro.com and any or all of myvpro.com’s parent and subsidiary companies will not be held responsible or liable for any injury, damage, or defect, permanent or temporary that may be caused by the improper use of a Li-ion (Lithium-ion), LiPo (Lithium-ion Polymer) and any rechargeable battery/batteries as well as chargers. Please have a greater understanding of the batteries/chargers you are using and how to care for them properly.

When working with Li-ion (Lithium-ion), LiPo (Lithium-ion Polymer) and any rechargeable cells, please be cautious and carefully use as they are very sensitive to charging characteristics and may explode or burn if mishandled. Please make sure that you have great knowledge on all rechargeable batteries before you use them. Always charge batteries at the clean and fire-proof surface. Never leave charging batteries unattended. If you see that there are visible damages on the batteries, please do not use. Always keep, store and transport the rechargeable cells in a safe, non-conductive container in controlled environment.

Customer Reviews
5 Based on 6 Reviews
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Filter Reviews:
Verified B.
Work good . better than original .

No complaints . Dual batteries have no struggle firing large builds.

Verified B.
Grand Rapids
Good .

works great

Peter M.
Grand Rapids
Good !

works great

Grand Rapids

works great


works great