The Vive Focus Vision is a sleek premium standalone VR headset that can also deliver solid PC VR. But it’s also running aging hardware, it’s riddled with software issues and it’s expensive compared to the Meta Quest 3.

Keijo Pyörälä has been working at Vaisala (K-Patents) Liquid Measurements for over 25 years in different positions from Product Management to Regional Sales Management and Global Business Development. Keijo has a Master’s Degree in Chemical Engineering from Lappeenranta University of Technology and an Executive Management Degree from Aalto University. He has been involved in a number of global product and business development projects in different industry segments from food & beverages, pulp & paper, sugar & sweeteners to chemical & polymer and oil & gas all over the world. His specialty is process optimization with in-line process measurements, process efficiency, and energy savings as well as quality improvement projects.

The clarifier aims to obtain a well-clarified green liquor for the slaker. It also reduces dregs carryover, which causes problems in downstream equipment. In the slaker, the clarified green liquor is brought into contact with reburned lime. This slaking reaction converts the green liquor into white liquor by converting sodium carbonate into sodium hydroxide, an active pulping chemical. Impurities, known as grits, are also separated at this stage.

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VR newbies probably won’t notice the difference much though, and that’s what really matters. The Quest 3S is just as comfortable as the Quest 3 to wear, and it can easily access the same apps and games on the Meta Quest Store. There’s no headphone jack either, but its built-in speakers deliver solid enveloping audio for games like Maestro, and you could also plug in a USB-C to 3.5mm adapter, or just pair wireless headphones.

The refractometer’s sensor is mounted directly in the pipelines for inline measurement, allowing real-time and active control to achieve the target TTA. The digital measurement is unaffected by bubbles, suspended particles, or color changes to the green liquor. The refractometer provides highly accurate measurement with no drift, and with an additional prism wash system it also supports scaling conditions.

For all of its complexity, though, the Bigscreen Beyond delivers the most immersive PC VR experience I’ve ever seen. Since it’s so light, you can easily wear it for hours. Together with its glorious screens, it’s the best option for VR enthusiasts who don’t mind dealing with cost and complexity for true immersion.

The Quest 3S can connect to gaming PCs over USB-C or wirelessly to play more intense VR experiences. It can also wirelessly stream your gameplay to Chromecast devices, or to AirPlay devices by mirroring the Quest app from an iPhone. If you’re still holding onto the Quest 2, or an original Quest, the Quest 3S is precisely the inexpensive upgrade you’ve been waiting for.

My test for ergonomics is fairly simple: How long can I wear a headset until I start to feel discomfort? For the most ergonomic devices, like the Quest 3, that could easily be an hour or two. But heavier PC hardware often feels cumbersome after just 15 minutes — you won’t find headsets guilty of that in this guide.

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With the Vision Pro, Apple is attempting to do for VR what the iPod did for media players, and what the iPhone did for smartphones. It’s a bold, $3,500 gamble to reshape the world of VR around Apple’s idea of “spatial computing.” It’s incredibly expensive, somewhat uncomfortable and surprisingly buggy, but the Vision Pro is the biggest leap forward we’ve seen in the stagnating VR industry in years. Most people shouldn’t buy it, but if you’re a developer or someone with money to burn and want the best immersive headset today, it’s truly in a league of its own.

White liquor is produced in slaker where sodium carbonate (Na2CO3) reacts with reburned lime (CaO) forming white liquor (NaOH) and calcium carbonate CaCO3, which is separated in lime mud washers and burned in lime kiln back to CaO.

The Quest 3 is powered by Qualcomm’s Snapdragon XR2 Gen 2 chip, which Meta says has double the graphics power of the Quest 2. That additional power is noticeable in games like Red Matter 2, which feature updated textures that deliver an experience closer to PC VR. The Quest 3’s new displays run at 2,064 by 2,208 pixels per eye, offering an even better experience than the PlayStation VR2. Its mixed reality cameras also let you easily see the real world, in case you need to quickly answer a text or Slack message. And they enable games that can be built around your room.

Storage capacity: 128GB | Battery life: 2.2 hours | Field of view: 110 degrees (horizontal), 96 degrees (vertical) | Max refresh rate: 120Hz

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A wide field of view, on the other hand, can make it seem like you’re actually flying over the globe in Google Earth. We look at a few popular games, like Superhot, Beat Saber and Pistol Whip, on every headset to judge how immersed we feel.

The Vaisala Polaris™ PR53SD Process Refractometer can be used to measure the density or TTA concentration of green liquor at both stages where control is needed: after the green liquor dissolving tank, and after the green liquor clarifier at the slaker feed.

In the causticizing process, passive chemicals are converted into active cooking chemicals to make white liquor. This is used in the digester as a cooking chemical and needs to be of a high and consistent quality to maximize mill productivity. Accurate and continuous measurement of green liquor density or total titratable alkali (TTA) is essential to ensure this high quality is maintained.

The Bigscreen Beyond also requires a custom face cushion, which is built from a 3D facescan when you place your order. Unfortunately, that makes it harder to share than other headsets. There’s also no room for glasses, since it’s so slim. You can buy prescription lens inserts from Bigscreen for an additional fee. And of course, you’ll have to live with a cable tethered to your PC, there’s none of the freedom of the cordless Meta Quest headsets.

Green liquor density or TTA must be measured accurately to achieve high-quality white liquor. Real-time measurement and control of density/TTA during the causticizing process has several notable benefits:

Density measurement technologies, on the other hand, raise several challenges, including continuous scaling, drifting and measurement insensitivity, unreliable control requiring manual input, and an unstable process that leads to efficiency and production losses.

There are several different methods to measure and control green liquor density/TTA in the causticizing process, but the most effective are inline, real time, and can be used for automatic control. Process refractometers offer several important several benefits:

The Quest 3S is Meta’s latest entry-level VR headset, but don’t let its reasonable $300 price fool you: It’s also a remarkable achievement for the company. It sports the same Qualcomm Snapdragon XR2 Gen 2 chip as the Quest 3, as well as a healthy 8GB of RAM, allowing it to power the same experiences as its pricier sibling. It also features Meta’s excellent Touch Plus controllers, which deliver solid motion controls, as well as responsive joysticks and buttons.

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However, it’s important to look at a virtual reality headset’s specs as a whole. Depending on what you’re looking for from a VR headset, you’ll want to consider factors like your PC’s graphics card if you plan to use the headset to play the best VR games. If you’re not looking to invest in a VR headset solely for gaming, features like head tracking allow you to explore your environment just by simply moving your head in the simulator. This often results in a more immersive and realistic experience.

If you’ve ever wanted to dive into a whole new world without leaving your living room, a VR headset could be your next big investment. These headsets aren’t just for gaming — although VR gaming is a blast. They can also transport you to virtual worlds for exploring impressive environments, immersive workouts or even social gatherings. Whether you’re craving an intense fitness session or a relaxing virtual tour through a museum, VR opens up possibilities that go way beyond traditional screens.There are plenty of options out there, so you don’t have to break the bank. Affordable standalone headsets like the Meta Quest 2 and Meta Quest 3S offer great visuals without needing any extra gear — you can just put them on and go. But if you’re ready to splurge, the Apple Vision Pro brings an ultra-premium experience with top-notch visuals and high-end features, though it does come with a hefty price tag.From standalone devices that let you wander freely to head-mounted displays (HMDs) that connect to laptops or PCs with a link cable for enhanced performance, there’s a VR headset for everyone. Many models include features like a comfortable head strap for longer sessions, Wi-Fi connectivity for smooth streaming, and portability that lets you explore without limits. So whether you’re just dipping your toes into VR or looking for a top-tier setup, there’s a headset out there to match your needs.

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Valve's Index kit remains one of the best high-end solutions on the market that provides a truly immersive VR experience. For $999 you get the Index headset, Valve's finger tracking controllers and two SteamVR base stations. While we've seen higher-resolution headsets arrive in the last two years, it's still a very solid option, with a 1,440 by 1,600 pixel resolution, an eye-watering 144Hz refresh rate and a massive 130-degree field of view. I'd gladly lose a few pixels for the Index’s smoother and more expansive screen, which are still far beyond most other consumer headsets.

As great as the Meta Quest 3 is, the Quest 2 is still a very good entry-level VR headset, and it’s worth considering if it’s on sale below its current $250 list price. The Meta Quest Pro, on the the hand, is an expensive boondoggle best ignored.

Valve's finger tracking controllers are fantastic as well, with a convenient strap that locks them onto your hands. They make playing Half-Life: Alyx feel like a dream. It's unfortunate that other VR games haven't fully taken advantage of the finger tracking though.

Now, our recommendation comes with a few caveats. At $550, the PS VR2 is more expensive than the PS5 itself. And it’s unclear how quickly its game library will fill up. The initial run has only a few exclusives, like Horizon VR and Gran Turismo 7, and we haven’t seen many new titles since then. But it’s still the easiest way to experience high-end VR, and it’s a major upgrade over the original PS VR.

The long-awaited follow-up to the Quest 2 is an upgrade in every respect: It’s more comfortable to wear, it has higher quality screens and it has full-color mixed reality cameras, allowing you to see the real world alongside virtual elements. While it’s more expensive at $500, it’s also a far more capable headset than the Quest 2 and the new Quest 3S, with hardware and optics that will keep you happily immersed in VR for years.

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The PS VR2 is one of the best headset we’ve tested. It offers dual 2K OLED HDR screens, effectively giving you 4K quality. It’s one of the most comfortable headsets around. And it has some genuinely refreshing new features, like eye tracking and headset haptics. (Yes, it can literally rock your noggin.) Best of all, the PS VR2 delivers high-quality virtual reality without the need for a $1,000+ gaming PC – all you need is a PlayStation 5.

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In the dissolving tank – inline measurement of density/TTA in the dissolving tank helps to maintain the target value of the green liquor and avoid deviations. This is a hugely important control for the stability of the entire line – sometimes said to be the point at which pulp making really starts. Measurements in the transfer lines are paired with a control loop to the weak wash liquor, giving automatic control based on density/TTA. The measurement device reads target values, avoids deviations, and is completely automatic, enabling stable TTA levels and safe operation of the dissolving tank.

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While we’re still waiting for a truly great haptic VR bodysuit to arrive, you can still achieve accurate body tracking with most Steam VR-compatible PC headsets. The Valve Index and HTC Vive Pro 2 both rely on room-tracking sensors that can map your body more effectively than the built-in sensors on competitors. You can also add HTC Vive Trackers to wrist and leg straps, as well as belts, for even better coverage. The Meta Quest 3 doesn’t have any easy body tracking solutions, but you can add Vive trackers when it’s plugged into your PC to mimic a Steam VR headset.

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Effective causticizing control improves the quality and stability of white liquor, decreases operating costs, and increases pulping efficiency. Effective lime dosage control reduces the recirculation flow of lime in the process, leading to less lime reburning in the lime kiln and decreased energy consumption. Real-time, accurate, and reliable inline measurement with a process refractometer is the easiest way to achieve these goals.

What makes the Quest 3 interesting is that it offers more than just solid VR: It also gives you a glimpse at what a mixed reality future could be. While it’s not as sharp or capable as Apple’s Vision Pro, that’s understandable. And just like previous Quest headsets, you can also plug it into a gaming PC for higher quality VR experiences.

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The process starts when the smelt from the recovery boiler is dissolved in weak wash in the dissolving tank to produce green liquor. The raw green liquor, which consists mostly of sodium carbonate and sodium sulfide, is then pumped into a stabilization tank to even out fluctuations in density and temperature, and to ensure a more constant liquor composition to the causticizing process.

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The only major downside is that the Quest 3S isn’t nearly as sharp as the Quest 3. It features the same 1,830 by 1,920 pixel per eye screen from the Quest 2, while the Quest 3's screen offers 30 percent more pixels (2,264 by 2,208 pixels per eye), to deliver a sharper and more realistic image.

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The downside, though, is that the Bigscreen Beyond is expensive. It’s $999 on its own if you’re just upgrading a Valve Index setup. If you’re starting from scratch, though, you’ll also need to buy two Steam VR base stations and a pair of Index controllers. That adds up to a whopping $1,578.

In the slaker feed – the second control is placed inline for active slaker control, ensuring that the green liquor for slaking has a consistent TTA. The real-time density/TTA measurement is in the slaker feed and then a control loop ensures the automatic and quick trimming of green liquor to counter disturbances. This increases causticizing efficiency while also avoiding overliming, improving the quality of white liquor and lime mud. It also ensures the safe operation of the slaker.

Outside of Meta’s hardware, the HTC Vive Pro 2 remains a fantastic PC headset, but it’s far more expensive than the Valve Index, which is more comfortable and offers better audio.

The best controllers fit naturally in your hands and offer accurate tracking. The industry has basically adopted the design of Meta’s excellent touch controllers, but we're also seeing intriguing leaps forward like Valve's finger tracking gamepads. We judge controllers based on how easy they are to hold, how they hold up to sweaty gameplay sessions and how easily headsets can track their position in space.

At the most basic level, a VR headset is simply a high quality screen that you’re holding up to your face. For a wired headset, the actual work of rendering a game is done on either a PC or game console. For completely wireless devices, like the Meta Quest 3, that work is handled right on the headset. They rely on either external sensors, or sensors built into the headsets, to map your physical space. While you can use a traditional gamepad or keyboard and mouse in VR, they typically use motion tracking controllers to immerse you in their 3D environments.

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Essentially an upgrade for the Index, the Beyond is a unique spin on a VR headset from Bigscreen, the developer of a popular app for watching video in VR. It looks more like an oversized pair of goggles than a massive VR headset. The $999 Beyond is the lightest VR option we’ve ever seen (it weighs a tad more than a deck of playing cards), and its Micro-OLED screens are sharp and offer near-perfect contrast. Unlike LCD screens, black can look genuinely black with the Beyond.

Immersion, meanwhile, comes from having high resolution screens with fast refresh rates, so everything looks sharp and smooth. Field of view is also a major element, as it describes how well VR screens can cover what you see. Having a narrow field of view makes it feel like you’re looking through a pair of binoculars, and limits your sense of “presence,” or the idea that you’re actually transported to a virtual world.

Only a few experiences, like VRChat, take advantage of full body tracking at the moment. Currently there aren’t any body tracking solutions for the PlayStation VR and VR2, but we’re intrigued by the company’s Mocopi body trackers, which were really announced in Japan.

I tend to judge VR headsets on a few basic criteria: Ergonomics, immersion and controls. It's not that hard to shove a mobile display into a plastic headset and strap some cheap elastic headbands onto it. But it takes skill to craft something that's well balanced and doesn't feel uncomfortable after 30 minutes.

As a SteamVR product, the Index requires installing two sensors at opposite corners of your room. And of course, it's wired to your PC. But that clunkiness is worth it for the higher refresh rate and more accurate tracking. Sure, it's not as easy to use as the Quest 3S, but at this price range, we assume you'll suffer a bit of inconvenience to get a truly high-quality VR experience.

Oculus is the previous name for Meta’s VR hardware. Currently, Meta only supports the Quest 3, Quest 3S and Quest Pro, all of which are wireless headsets. As we explain above, PC VR headsets can generally achieve better quality virtual reality, since they rely on more powerful graphics hardware.