Electronic Height Gauges arrow Mitutoyo QM-Height Series 518

QM-Height Series 518

Part#: QM Series 518
Supplier: Mitutoyo
Calibration Certificate: is available at extra cost
Photo Gallery - click any photo to enlarge

QM-Height measures height, inside/outside widths, inside/outside diameters, circle pitch (height components), free-form surface maximum/minimum heights and displacement by scanning measurement*. It also remembers the immediately preceding measurement (height component) and displays the difference (pitch) between results below the measurement.


series 518 Mitutoyo height gauge A full range of options are provided to enhance operability, including a variety of probe contact points, output to a PC via USB Input Tool Direct and wireless output via a U-Wave transmitter.

  • Best-in-class accuracy ±(2.4+2.1L/600)μm
  • Built-in pneumatic flotation system enables smooth movement along the surface plate.
  • Newly developed high accuracy and high resolution ABSOLUTE linear encoder for position detection.
  • Easy reference icon keys. Possible to measure inside/outside diameter via unique process (detect the circle apex and process by tracing measurement).
  • Various types of optional probes are available.
  • Large size LCD with back light.
  • GO/±NG judgment is performed by setting the upper and lower tolerances. If a judgment result is out of tolerance, the display backlighting changes from green to red, so tolerance judgment can be made at a glance.
  • Slider elevation knob (for travel) / wheel (for measurement).
  • With SPC and USB output.
  1. Remembers an origin point once it has been set
    Does not have to be reset each time the system is turned on.
  2. Go/±NG judgment by LED (red, orange, green) and measurement examples
    LEDs are activated at the time of tolerance judgment – green for Go, red for +NG, and orange for –NG. “-NG”, “GO” and “+NG” also appear on the LCD.
  3. External output
    • Digimatic and USB output are provided as standard.
    • U-Wave wireless output (optional)
  4. Simple button layout and user-friendly icon keys
    • An ergonomic cross key configuration enhances operability for
    setting presets and other settings.
    • Frequently used keys are indicated with icons.
  5. Power supply
    • Four alkaline AA batteries (standard accessories)
    • Also operates on four commercially available NiMH AA rechargeable batteries
    • AC adapter (standard accessory)
  6. Inside/outside diameters, maximum/minimum heights and
    displacement can be measured using a standard probe
    • Besides height measurement, Mitutoyo’s proprietary mechanism and firmware enables scanning measurement of inside/outside diameters, maximum/minimum heights, and displacement.
  7. Pneumatic flotation system
    • Pressing a button on the grip activates the internal pump. The base rises andmoves smoothly along the surface plate.
  8. Probe elevation wheel
    • Allows for fine coarse adjustment during measurement
Mitutoyo weight-gauges series 518 Mitutoyo Height Gauges - Series 518 Mitutoyo Height Gauges - Series 518

Go/±NG judgment by LED

Height measurement

Inside diameter measurement

Video presentation


Model QMH-14”A QMH-24”A QMH-14”B QMH-24”B
Range 0 - 14”/ 0-350mm 0 - 24”/ 0-600mm 0 - 14”/ 0-350mm 0 - 24”/ 0-600mm
Resolution 0.001 / 0.0005mm /.00005” / .0001”
Accuracy (20°C) ±(2.4+2.1L/600)μm L = Measuring length (mm)
Repeatability (20°C) 2s 1.8μm
Perpendicularity 7μm 12μm 7μm 12μm
Guiding method Roller bearing
Drive method Manual Operation
Scale type Electromagnetic induction type ABSOLUTE linear encoder
Measuring force 1.5±0.5(N)
Data Output Digimatic output/USB
Pneumatic floating system N/A Included
Power supply AC adapter battery / (LR6 x 4) Standard accessory / Nickel metal hydride battery (x4)
Battery operation time Approx. 300 hours (Not using pneumatic floating system)
Approx. 80 hours (Using pneumatic floating system regularly)
Standard Accessories Stepped probe (05H2A148)
Probe diameter calibration block (12AAA715)
LR6 Battery / AC Adapter (06AEG180JA) 120V
Mass 55.16 lbs (25kg) 63.93 lbs (29kg) 57.32 lbs (26kg) 66.14 lbs (30kg)
Dimensions 41.85”x21.85x18.94”
SKU 518-231 518-233 518-235 518-237

Dimensions and accesories

qmh dimensions

Standard accesories:
  • Probe diameter calibration block
  • ø5 stepped probe
  • Alkaline batteries (LR6) (4 pieces)
  • AC adapter

Diverse options expand measurement possibilities:

  • depth probe
  • ø2 to ø4 ball (coaxial type)
  • ø14 disk
  • ø20 disk
  • ø4 ball (eccentric type)
  • ø6 ball (eccentric type)
  • Holder for Dial Gage
  • Long holder
  • 9 × 9 adapter
  • Scriber Clamp (for 9 × 9 adapter)
  • 6.35 × 12.7 adapter
  • Clamp (for 6.35 × 12.7 adapter)
  • U-WAVE mounting plate

Need to have this new Mitutoyo QM Series 518 QM-Height Series 518 calibrated? While this gauge has passed a quality control check, having a calibration certificate for electronic height gauges might be required by your quality control system. Digital Measurement Metrology (owner of ProcessInstruments.ca) is a canadian metrology company with more than 25 years of experience. Our Brampton, Ontario based calibration lab has one of the most comprehensive ISO 17025 accredited calibration scope in Canada.

Do you have an old Mitutoyo gauge to be calibrated? We might be able to calibrate Mitutoyo electronic height gauges (Mitutoyo QM Series 518 or a different model) and provide an ISO, NIST traceable calibration certificate. Please contact our metrology lab for more info.

Ordering info

SKUDescription Measuring Range PerpendicularityIn Stock
518-231QMH 14" A
ABSOLUTE Digital Height Gage
7Ám 0
518-233QMH 24" A
ABSOLUTE Digital Height Gage
12Ám 0
518-235QMH 14" B - Air Floating
ABSOLUTE Digital Height Gage
7Ám 0
518-237QMH 24" B - Air Floating
ABSOLUTE Digital Height Gage
12Ám 0
To order QM-Height Series 518 or technical assistance please contact us.

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