FT-5000 Air Gauge

FT-5000FT-5000 Column Type Air Gauge

The Series FT-5000 column type air gauge, micrometer display is a precision, non-contact measuring instrument when combined with a customized air probe sensor. Air gauge measurement has been around for decades. It is a non-destructive testing method that utilizes air flow and the resistance created between an object under test and the air gauge’s sensing probe. The air resistance or back pressure changes with distance between the air probe and device under test. This air pressure change out of the air sensor can be scaled on a display to determine dimensional analysis as well as product acceptance.

The FT-5000 column type air gauge display with separate, customized air probe sensor performs fast, easy and precise dimensional analysis on components. Column displays can also be conveniently daisy-chained with additional units to allow quick inspections of multiple dimensions with various sensors. The air gauge technology offers sufficient magnification and reliability to measure small tolerances down to 0.5 micron. Due to its fast response, outstanding tolerance and accurate repeatability, Tosok air gauge micrometers are ideal for quality measurements on the production floor or in the lab.


  • In coordination with the max./min. masters and the customized air probe sensor, air adjustment knobs enable calibration of the zero and full scale
  • Possesses a light weight and slim frame allowing for placement on any bench, plus enables a small foot-print when daisy-chaining units
  • Up to 6 units can be stacked allowing multiple readings to be simultaneously taken on the same part
  • Sensitivity adjustment knob allows fine tuning for more precise air control
  • Simplified operation and set up compared with digital models
  • Non-contact measurement eliminates the potential for damage to the test part
  • Especially effective in quickly measuring inside and outside diameters
  • Quick and stable air float micrometer is free of hysteresis error
  • High pressure air from sensor cleans off oil and dust on the test pieces, assuring accurate measurement
  • Adjustable high/low limit flag indicators aid user in determining part acceptability


Model FT-5000
Input 1 Air Channel per column
Measuring Range μm (mm) (see Chart A) 20 (0.0200), 40 (0.0400), 100 (0.100), 200 (0.200)
Scale Graduation μm (mm) (see Chart A) 0.5 (0.0005), 1 (0.001), 2 (0.002), 5 (0.005)
Air Supply Pressure 28.4 psi (196 kPa)
Source Pressure 42.7 psi to 99 psi (294 to 686 kPa)
Air Supply Volume 106 cfh (50 l/min)
Power Requirement 85 to 264 VAC, 50/60 Hz 100-VAC
Operating Temperature 32 to 113°F (0 to 45°C)
Dimensions 4.3″ wide x 19.7″deep x 8.3″ high (110 × 501 x 210 mm)
Weight Single: 9.9 lb (4.5 kg)
Dual Stack: 16.5 lb (7.5 kg)
Triple Stack 23 lb (10.5 kg)
Quadruple Stack 29.8 (13.5 kg)
Quintuple Stack: 36.4 lb (16.5 kg)
Sextuple Stack 43 lb (19.5 kg)
Warranty 1-Year


Model FT-5100 FT-5200 FT-5500 FT-5000
Standard Magnification 1,000 2,000 5,000 10,000
Indication Range 200 100 40 20
Effective Indication Range 150 70 30 15
Graduation 5 2 1 0.5
Repeatability Max 2.0 Max 1.0 Max 0.5 Max 0.3
Response Time (sec) Max 1.5 Max 1.5 Max 1.8 Max 2.0

Ordering Details

Stack Number Scale Magnification
1000 2000 5000 10000
Single Type FT-5101 FT-5201 FT-5501 FT-5001
Dual Type FT-5102 FT-5202 FT-5502 FT-5002
Triple Type FT-5103 FT-5203 FT-5503 FT-5003
Quadruple Type FT-5104 FT-5204 FT-5504 FT-5004
Quintuple Type FT-5105 FT-5205 FT-5505 FT-5005
Sextuple Type FT-5106 FT-5206 FT-5506 FT-5006

Optional Accessories

FUA-503 Air Filter & oil Separator -manual drain. For 1 to 3 Column stacks
FUA-506 Air Filter & oil Separator -manual drain. For 4 to 6 Column stacks
CAG2000-OP-AR Precision Regulator


Literature Download:

FT-5000 Data Sheet | FT-5000 Manual