Now shipping

Industrial vibration
intelligence.

A compact WiFi vibration analyzer that mounts directly to your machine and streams live readings to your phone. Add the wired tach and it calculates the correction weight and angle. No laptop. No app.

Buy the Analyzer · $99 How It Works
GrayVolt vibration analyzer magnetically mounted on a CNC spindle with its black USB power cable connected
Actual installation

Spectrum · X axis · peak g

Speed 3,900 RPM 1× 65.0 Hz Peak 65.0 Hz Amp 0.019 g
6.66
kHz Sample Rate
24,000
RPM Tested
< 5
Min Setup
±16
g Sensor Range
Free US shippingDirect orders are fulfilled by GrayVolt and ship from California within 3 days.
Assembled in USAEvery unit built, potted, and tested in California.
1-year warrantyWe repair or replace, shipping on us.
Secure Stripe checkoutYour card never touches our servers.
Products

Two tools. One platform.

Start with the Analyzer and add full balancing capability anytime. The hardware is already ready: connect the tach and select Balancer mode. No code or reflashing required.

Most Popular
Vibration Analyzer

Real-time vibration monitoring with FFT spectrum analysis. Mount, connect, and see what your machine is telling you, instantly on your phone.

  • 6-axis IMU: 3-axis accelerometer + gyroscope
  • Real-time FFT spectrum display
  • WiFi captive portal, no app download
  • Temperature monitoring (built-in)
  • RGB status LED
  • Magnetic mount + adhesive tape included
  • Upgradable to Spindle Balancer
$99 one-time purchase
Secure checkout by Stripe. Your card never touches our servers.
VISAMASTERCARDAMEXAPPLE PAYGOOGLE PAYLINK
Prefer Amazon? Buy there instead ↗
New
Spindle Balancer

Everything in the Analyzer, plus integrated tachometer and automatic balancing algorithm. Tells you exactly how much weight to add and where.

  • Everything in the Vibration Analyzer
  • Integrated IR tachometer sensor
  • Automatic influence coefficient balancing
  • Sub-2.5 mm/s residual imbalance achievable
  • Phase accuracy ±2 to 3°
  • Includes tach sensor + 3.5mm cable
$199 one-time / complete kit
Secure checkout by Stripe. Your card never touches our servers.
VISAMASTERCARDAMEXAPPLE PAYGOOGLE PAYLINK
Direct only for now, Amazon coming soon
See It In Action

The whole workflow, in motion.

From first boot to a balanced spindle, every step runs right in your phone's browser. No installs, no desktop software.

Set upJoin WiFi and choose Analyzer or Balancer mode, under a minute.
AnalyzeLive FFT, ISO 10816 severity and bearing-fault screening at a glance.
BalanceGuided single-plane balancing: the exact correction weight & angle.
FleetLive status across every device you own, on one screen.
How It Works

Three steps. Five minutes.

No laptop, no drivers, no software installation. Just a phone with a browser.

01
Mount

Stick the magnetic sensor on the spindle housing. For balancing, add one high-contrast optical target and connect the wired IR tach. Plug in USB-C power.

02
Connect

Open your phone's WiFi settings. Connect to "GV-XXXX". Your browser opens automatically with the measurement dashboard.

03
Measure

Start the spindle. Vibration data streams live. The Balancer edition tells you exactly where to add weight and how much. Done.

Real Shop Setups

Shown where it actually works.

These are GrayVolt units on the machines used for development and verification. The real fixtures, cables, and shop wear stay in frame so you can judge the mounting scale for yourself.

GrayVolt vibration analyzer and optical tach mounted on a dial indicator stand beside a JET lathe
Balancer on a JET lathe Vibration analyzer, optical tach, and dial indicator stand. Dots mark the unit and the tach eye
GrayVolt vibration analyzer mounted on a vertical CNC spindle
Analyzer on a CNC spindle Magnetic mount at working scale
Who Builds This

Built and supported by the engineer behind it.

GrayVolt is a founder-led California engineering company. Product support goes directly to the engineers who designed the board and wrote the firmware, so questions reach people who know the system end to end. Every unit is assembled, potted, and tested in California. Direct orders ship from California.

GRAYVOLT LLC · CALIFORNIA DESIGNED & ASSEMBLED IN USA FCC ID 2AC7Z-ESPWROOME TYPICAL REPLY: 1 BUSINESS DAY
FAQ

The questions
we get every day.

Still unsure? Talk to an engineer →

No. The sensor hosts its own WiFi network and serves the measurement dashboard through your phone's or tablet's built-in browser via a captive portal. Works on iOS, Android, Windows, macOS, anything with WiFi and a browser.

The sensor reads once-per-revolution vibration amplitude and phase via the IR tach. The web UI then uses the classic influence-coefficient method to tell you how much trim weight to add, and at what angular position, to cancel the measured imbalance. Results depend on your setup and machine.

Yes. The hardware is identical. Buy the $100 Upgrade Kit. It ships with the IR tach sensor and 3.5 mm cable. Plug in the tach, select Balancer in the device settings, and balancing is enabled. No codes, nothing to reflash.

GrayVolt unit magnetically mounted on a CNC spindle with the wired IR tach pickup on a red dial indicator stand, a black 3.5 millimeter tach cable, and a white USB-C power cable connected
Same hardware, added tachThe black 3.5 mm lead connects the wired optical pickup; the white USB-C lead powers the unit.

Any rotating machine where an IMU can pick up once-per-rev signal. We've tested up to 24,000 RPM; the hardware's IMU bandwidth extends the theoretical ceiling well beyond that, but we're not making tested claims past 24k until we've run them.

Entirely local by default. The sensor streams to your phone over its own WiFi. No internet connection required, no data leaves your network. An optional MQTT export lets you push readings to your own server if you want historical trending.

A strong magnet in the GrayVolt unit's base is the fastest option for ferrous housings. For aluminum or plastic, 3M VHB adhesive strips are included. The Balancer's separate IR tach pickup has an 8 mm shank that fits a common magnetic-base dial indicator stand for rigid, fine-adjustable positioning. The stand shown is not included.

GrayVolt vibration analyzer magnetically attached to the steel housing of a vertical CNC spindle with its black USB power cable hanging down
Magnetic mountingThe GrayVolt unit sits directly on a ferrous spindle housing; USB power remains connected during measurement.

With the machine stopped, clamp the wired IR pickup's 8 mm shank in a rigid dial indicator stand and lock every joint. Aim the eye squarely at one clean, high-contrast optical mark, leave a safe non-contact gap, and turn the spindle by hand to verify clearance. Reflective tape works well on a darker surface; a bold dark mark can work on bright metal. Plug the 3.5 mm cable into TACH, then open Settings → Tachometer → Run calibration and follow the hand-rotation check before running the spindle.

Wired GrayVolt IR tach pickup held on a red magnetic-base dial indicator stand beside a CNC spindle
01 · Hold it rigidlyClamp the pickup shank in the stand, then lock every arm and joint.
Close view of the IR tach eye aimed squarely at the spindle target from a dial indicator stand
02 · Aim it squarelyDisable the spindle drive, set a safe air gap, and verify clearance by hand.
Real shop setup shown · magnetic-base dial indicator stand not included
Get Started

Stop guessing.
Start measuring.

Free shipping to the US and Canada, a 1-year warranty, and secure Stripe checkout.

Get the Analyzer, $99 Talk to the engineers