Utillian 621 Vaporiser Review: A Worthy Update to a Proven Dry Herb Vaporiser?

Updated: June 27, 2025
Experience the new Utillian 621, a budget dry herb vaporizer that uses convection heating. It's a direct update to the previous model, but is it worth it?

Utillian is known for producing high-quality convection vaporisers at affordable prices. The newest member of their family is the Utillian 621, which offers amazing flavour thanks to its convection heating.

This dry herb vaporiser is an upgraded version of the popular Utillian 620 with some new features and improvements. In this review, I will go over these changes and also compare this unit to other popular units in its category. You can read comparisons on our best dry herb vaporiser ranking page.

Utillian 621 Vaporizer Review

 

How does the Utillian 621 vaporizer work?

How It Works

The Utillian 621 is a versatile vaporizer that can handle both dry herbs and concentrates. It features a convection helix heating chamber that delivers smooth and flavourful vapour.

To use the Utillian 621 with dry herbs, follow these simple steps:

  1. Pull the magnetic mouthpiece off the unit and load your herb in the heating chamber.
  2. Replace the mouthpiece and turn on the device by pressing the power button five times.
  3. Use the up and down buttons to select your preferred temperature setting. Wait until the device vibrates and the LED display shows the set temperature.

To use the Utillian 621 with concentrates, follow these simple steps:

  1. Pull the magnetic mouthpiece off the unit and insert the wax canister into the heating chamber.
  2. Load your concentrate into the wax canister and replace the mouthpiece.
  3. Turn on the device by pressing the power button five times and select your preferred highest temperature setting. Wait until the device vibrates and the LED display shows the temperature, indicating it has reached the selected temperature.

No matter what material you choose to place into the 621, you can enjoy your session until the device turns off automatically after eight minutes, or press the power button five times to turn it off manually. This portable vaporiser comes with a built-in stir tool to mix your material, so be sure to use it.

Utillian 621 Vaporizer LED Display

Temperature Flexibility

The Utillian 621 has the same precise temperature control as the 620, ranging from 160 to 220 degrees Celsius. It also has the same OLED display that shows both the current and the set temperature. You can easily switch between Celsius and Fahrenheit by holding the up and down buttons.

The temperature flexibility of the Utillian 621 allows you to customise your vaping experience according to your preferences and the type of material you are using. Also, since the U621 is compatible with both materials, its broad temperature range can be used very effectively. Higher temperatures will work better with wax, while for those who use dry herbs, the lower temperatures can also be used to produce flavourful vapour.

Vapor Quality Utillian 621

Vapour Quality

The Utillian 621 vaporiser is designed to give you great-tasting vapour. The heating system is the same as the proven 620, it uses convection heating, which means the air around the chamber is what cooks your herb as opposed to having direct contact with a coil. This system requires more energy but produces much more flavourful vapour. In contrast, units like the Arc GT3 use conduction heating which creates strong vapour but less flavourful.

To enhance the vapour quality even further, the Utillian 621 comes with a glass mouthpiece. This mouthpiece has small bumps that prevent any tiny particles from getting into your mouth. If you want a vaporiser that can handle both dry herbs and concentrates while still delivering excellent vapour, the Utillian 621 is a fantastic choice.

To add to its quality the new 621 also comes with an upgraded glass mouthpiece, which now features holes that help keep the vapour pure. These holes trap microparticles that make it through the filters.

Utillian 621 Manufacturing Quality

Manufacturing Quality

The Utillian 621 is a stylish and strong vaporiser with a smooth and durable outer shell made of aluminium. It feels premium and is built to last. It looks similar to the Utillian 620 but comes with some important improvements and features.

The previous micro USB was now updated to a USB-C charging port, which allows for faster and more convenient charging. The device can charge up to 1.8 amps, nearly twice as fast as the previous model.

The U621 also has a magnetic glass mouthpiece with a dimpled design that is easy to attach and detach. The glass mouthpiece has small bumps that help cool down the vapour and catch any particles that might escape the screen. The mouthpiece is black, making it less noticeable and more discreet.

This portable vaporiser has a simple and easy-to-use display that shows the battery level, set temperature, and session timer. The temperature ranges from 160°C to 220°C, and you can adjust them by using the plus and minus buttons.

Utillian 621 USB-C Charging

Battery Life

The Utillian 621 has a battery that can last up to 60 minutes on a single charge. This is above average for a vaporiser of this size and should be enough for most people for a day or two.

The Utillian 621 battery works well for both dry herb and concentrate users. It can handle different temperature settings and session lengths. However, if you use it a lot and like higher temperatures or longer sessions, you might want to consider the Utillian 723.

The Utillian 621 uses USB-C charging, which is faster than the old way of charging with micro-USB. It can be fully charged in about 90 minutes. This display helps you keep track of the battery and know when to charge or change settings.

The Utillian 621 has a great battery that gives you a versatile and convenient vaping experience. It’s similar to the Zeus Arc S, another top-quality vaporiser that also uses USB-C charging and has a bigger 3500 mAh battery, but its conduction based so its vapour is not as flavourful.

Utillian 621 Portable Vaporizer

Portability

The Utillian 621 is a great companion for when you’re travelling. It’s a bit bigger than the Utillian 421. Even so, you can easily hold it in your hand and slip it into any pocket or bag.

One great thing about the Utillian 621 is that it charges quickly and conveniently with any USB-C cable. This makes it even more portable. The wax canister is small and easy to hide, and you can keep it inside the heating chamber when you’re not using it.

There is one thing you should be careful of when it comes to portability, and that’s the glass mouthpiece. It extends less than an inch out of the device, which is super discreet. The glass mouthpiece is designed to cool down the vapour and improve the taste, but it could break if it’s dropped or bumped. So, make sure to be cautious when carrying or using the device, and don’t put it in your pocket or bag with any sharp or hard items. If you think you need a case, you should check out the ZEUS Armor. It’s a great case for keeping your grinder and vaporiser safe, and it even helps prevent any smells from escaping.

Utillian 621 ease of use

Ease Of Use

Utillian has made the 621 easier to use and more convenient than the 620. It has a simple 3-button system that lets you turn it on and off, change the temperature, and switch between Celsius and Fahrenheit. The OLED display shows you the current and set temperature, as well as a timer that you can set for 3 to 8 minutes.

Loading and emptying the device is a breeze with its magnetic mouthpiece and tool. You can use the wax canister to vape concentrates, and when you’re not using it, you can store it inside the heating chamber. The heating chamber is smaller than usual, which makes it more efficient for most people.

Cleaning the Utillian 621 is also easy. You can remove the convection helix and take out the screens from the chamber to soak them in isopropyl alcohol. For a more thorough clean, you can use the included brush or a Zeus Purify kit to clean the vapour and air path.

Utillian 621 Vaporizer Discreetness

Discreetness

The Utillian 621 is a discreet device that can be used in public without attracting too much attention. It has a sleek and stealthy design, with a black shell and mouthpiece that blend in with most environments. It is also decently compact and lightweight. It can be easily held and slipped into any pocket or bag when not in use.

The device also makes some noise when heating up and vibrating, which may be audible in quiet settings. However, the Utillian 621 has some features that help improve its discreetness, such as the OLED display that can be turned off and the glass mouthpiece that can be removed and stored separately. The Utillian 621 also has the advantage of being versatile, as it can vape both dry herbs and concentrate with the wax canister, which may reduce the need to carry multiple devices. The Utillian 621 is a great choice for users who value discreetness, portability, and quality.

Utillian 621 Overall Experience

Overall Experience

The Utillian 621 vaporiser is an impressive device that produces high-quality vapour from dry herbs and concentrates. It’s an improvement over the older Utillian 620, which was already excellent. In my opinion, it offers great value for the price.

It’s important to mention that the Utillian 621 is less portable compared to devices like the Zeus Arc S, which are around the same price but smaller in size. Also, the Arc S uses conduction, and the Utillian 621 has slightly better vapour quality. If you want to see how the 621 compares to other units, check out our dry herb vaporiser ranking page. We rank all portable vaporisers based on various specifications, making it easy for users to compare the top units.

In conclusion, the Utillian 621 is a fantastic device that surpasses its predecessor in significant ways. Think of it like getting the latest model of a smartphone – the additional cost is worth the benefits it provides. It’s definitely a worthwhile investment. I hope this review has given you a clear understanding of what this Portable Vaporizer has to offer. Thanks for reading, and as always: Keep Vapin’!

Score 9.2 Awesome

Pros

  • +

    Budget-friendly Convection

  • +

    Compatible with Herbs and Wax

  • +

    Improved glass mouthpiece cools vapor

Cons

  • -

    Smaller chamber not ideal for heavy use

  • -

    Non-adjustable airflow

  • 9.2

Vaporizer Wholesale and Distribution

Whether you’re a purchaser or reseller of vaporizers, E Rigs, Vapor Cups, 510 Thread Batteries, Wax Pens, Cartridge Batteries or Dab Pens, join our Vaporizer Wholesale program or register with Thermodyne Systems’ Vaporizer Distribution Network for pricing and program details. Our sales specialists will reach out to assist you.

About Author

Avatar for Kirill Shelest

Kirill is a cannabis enthusiast and vaporizer expert with over 200 articles on vaporization techniques, product reviews, and best practices. He holds a degree in Journalism, PR, and Media Marketing from the University of Warsaw and is known for his expertise in new vaporizing trends in the DACH region. When not writing, Kirill enjoys boxing, extreme driving, and listening to Pink Floyd.

The reviews and ratings draw from personal insights and over a decade of industry experience. They reflect the views of the Editor/Author and serve as a foundation for research. However, they should be used merely as a guide. We urge all visitors to conduct comprehensive research to achieve the most unbiased perspective before making a purchase.