A launch monitor measures what happens at impact — ball speed, launch angle, spin rate, and direction — and uses that data to simulate where the ball would travel on a real course. Understanding how they work, and which type fits your room, is the most important decision in any simulator build. Get this right and everything else falls into place. Get it wrong and you'll be re-buying equipment.
What a launch monitor actually measures
Every launch monitor captures the same basic event: the moment of ball contact. What separates them is how they capture it and what they can measure from that event.
| Data type | What it tells you | Who measures it accurately |
|---|---|---|
| Ball speed | How fast the ball leaves the face | All monitors |
| Launch angle | The vertical angle the ball launches at | All monitors |
| Spin rate | How much the ball is spinning (affects curve and distance) | Camera and radar with stickers |
| Spin axis | Which direction the spin is tilted (draw vs fade) | Camera and radar with stickers |
| Club head speed | How fast your club is moving at impact | Most monitors (accuracy varies) |
| Club path and face angle | Direction of swing and where the face points | Premium camera and overhead only |
The data the simulator software uses to calculate ball flight is only as accurate as what the monitor can measure. A monitor that estimates spin rather than measuring it will produce ball flight that feels slightly off compared to your real shots on the course.
The three monitor types — and which rooms they fit
This is the decision that depends entirely on your room. Not your budget, not your preferred brand — your room depth and ceiling height.
Camera-based monitors (SkyTrak Plus, Bushnell Launch Pro, Foresight GC3) sit to the side of the ball and capture impact with high-speed cameras. Because they measure at impact rather than tracking ball flight, they work in rooms as short as 12 ft. They're the right choice for most home builds.
Radar-based monitors (Garmin R10, Mevo Gen 2, Trackman) sit behind the golfer and use Doppler radar to track the ball through flight. They need the ball to travel at least 8–10 ft to generate reliable data, which means rooms under 14–16 ft don't work well. They're excellent for outdoor use and longer indoor spaces.
Overhead monitors (Uneekor Eye Mini, Eye XO2, ProTee VX) mount to the ceiling above the hitting area. They work in short rooms like camera monitors and require no daily alignment — you just walk in and swing. The trade-off is installation complexity and a ceiling height requirement of at least 9.5 ft at the mount point.
| Type | Min room depth | Min ceiling | Outdoor use | Daily setup |
|---|---|---|---|---|
| Camera (side) | 12 ft | 8.5 ft | Limited | Quick positioning |
| Radar (behind) | 16 ft | 8.5 ft | Excellent | Quick positioning |
| Overhead (ceiling) | 12 ft | 9.5 ft at mount | No | None — permanent |
How to choose based on your room
Start with your room depth. Measure from the back wall (where you'll stand) to where you want the screen. That single number eliminates most of the options and simplifies the decision significantly.
- Under 14 ft: Camera monitor only. SkyTrak Plus or Bushnell Launch Pro are the two best options at different price points.
- 14–16 ft: Camera monitor recommended. Radar is marginal — some models work, most don't produce consistent data at this depth.
- 16 ft+: Both camera and radar work. Radar opens up lower-cost options like Garmin R10 and Mevo Gen 2.
- 9.5 ft+ ceiling and permanent setup: Consider overhead. Zero daily alignment is a meaningful quality-of-life upgrade for regular use.
What the data is actually used for
The simulator software takes your ball data and runs it through a physics model to calculate where the ball would travel on a real course. The software then shows you that shot on screen — carry distance, curve, and landing position.
The accuracy of that simulation depends on the accuracy of the input data. A well-calibrated camera monitor in a 12 ft room will produce ball flight that feels realistic and useful for practice. The key is matching the monitor to your room so it can do its job correctly.
→ How launch monitors work — the full explanationExplore specific topics
- Radar vs Camera — which technology works better for your room
- Overhead launch monitors — ceiling-mounted systems explained
- Portable launch monitors — range use and dual-purpose setups
- Launch monitor placement — exact positioning by monitor type
- Accuracy and limitations — what monitors measure well and what they don't
Ready to compare specific monitors?
Once you know your room depth and which monitor type fits, the Best Launch Monitors shortlist gives you ranked picks at each price point with honest context on who each one is right for.
We've done the research. Here are our recommendations by room size and budget.