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521 TAB mini V3 Ohm Meter

Brand: GVTech
Product Code: Ohm Reader 510
Availability: In Stock
$24.95 $14.95

521 TAB mini V3 Ohm Meter

The 521 TAB mini V3 ohm meter is a portable RBA coil builder platform. Besides the function of the ohm meter, the 521 TAB mini V3 ohm meter platform employs voltage reduction control, recovery, and firing test mode. The device operates on a single 18650 battery. More than that, the 521 TAB mini V3 ohm meter matches a 510 thread connection with spring loaded pin.

Ohm Reader With Fire Button Design

The ohm reader with fire button 521 TAB mini V3 is a lightweight and ergonomic device made of ABS plastic. The compact and modest case features the following dimensions: 82mm by 61mm by 26mm, and weighs 72 grams. The ohm reader with fire button 521 TAB mini V3 is available only in a black color option. The front panel of the ohm reader with fire button 521 TAB mini V3 employs a 3-digit 7-segment OLED display, a firing button, and a mode selector. The working plane also holds a 510 connector with a spring-loaded pin. The left side of the power button holds a Micro-USB port. The bottom side of the device features a battery compartment hidden under the removable cap.

Ohm Reader for RDA Functionality

The 521 TAB mini V3 ohm reader for RDA is easy to operate. The 521 TAB mini V3 ohm reader for RDA fits most tanks with a standard 510 connection and provides precise readings of the coil resistance. The tank simply screws onto the base connector. The mode selector changes to the meter position. The bright LED screen displays the ohm resistance of the built coil. Moreover, the 521 TAB mini V3 ohm reader for RDA has reverse battery protection, short circuit protection, and battery output voltage testing.

Ohm Reader 510 Battery 

The 521 Tab mini V3 ohm meter powers from a single 18650 battery [not included]. The battery connects to the devices from the bottom side and recharges via a Micro-USB port. Furthermore, the red LED light indicates the charging process by blinking.

Ohm Reader 510 Main Benefits




Easy To Utilize


521 TAB mini V3 Ohm Meter Features:

Brand: One Coin

Model: 521 TAB mini V3

Product Type: RBA Coil Builder

Power: Single 1865O

Connection: 51O Thread

Standby Power Consumption:<10mA

Resistance Range: 0.05Ω-9.9Ω

Resistance Rate: O.1Ω

Operating Temperature: -20C to 70C

LED Display

Charging AC/USB: 5V/1A

Charging Port: Micro USB

Material: ABS Plastic

Height: 82mm

Width: 61mm

Depth: 26mm

Weight: 72g

Color: Black


1x 521 TAB mini V3 Device

User Manual

The OFF position provides a complete shutdown of the device.

In the Fire position, you can warm the wire and find out the current battery voltage and voltage supplied to the wire. 

In the Meter position, you recognize the resistance of the wound wire.

Safety Tips

Keep the device away from children, pets, and sunlight;

Storage it in a dry, warm place;

Do not use the device if it is damaged;

Avoid using or recharging the device on a wet surface.

Note: This product does not contain the 18650 lithium battery; if you want to use it usually, please purchase the 18650 lithium battery.

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WARNING: This product can expose you to chemicals including nicotine, which is known to be harmful in the State of California to cause birth defects or other reproductive harm. For more information, go to
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