Eddy Current Displacement Sensor EZ GAP®


Eddy Current Displacement Sensor EZ GAP®

EZ GAP is the eddy current displacement sensor to measure the distance to iron, stainless and aluminum.

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High environmentally-resistant sensor

Sensor's materials are used with SUS and PPS.
Clears the IP protection rating 67, and withstands the temperature of up to 105℃(Option:130℃).
Proves the sensor's ability under the poor environment.

Easy calibration setting

The corrected points can be set from 2 to 11 points freely at your desired sensor position. As the number of corrected point increases, the linearity
errors become smaller.(linearity error :±0.15% F.S.)
The nonmagnetic metal (SUS 304, A5052) object also can be detected by the sensor.

Chart:For calibration at 5 or more points

Reducing the temperature drift

The temperature drift is less than ±0.015% F.S./℃ by the temperature drift adjustment function.

(within a range less than a half of the rated detection range)

Temperature measuring function

The temperature at the sensor head can be monitored.
This function makes soundness of the sensor check , so the products can stabilize the quality.

State of the temperature display

Extendable up to 20m

The sensor cable can be extended up to 20 m.
It is easier to wire. Each connector is plated with gold which gives resistance to improper contact.

Improved the maintenance efficiency!

It can be replaced individually even if the sensor or amplifier has a malfunction.


Touch roll is available

Touch rolls introduced in the application are available at NSD.

Fig: Measures the rubber thickness, Touch roll (manufactured by NSD)

System Configuration

Fig: EZ GAP® System Configuration


Item Specification
Model *1 Sensor GPS-1718M-[L1] GPS-2818M-[L1] GPS-2824M-[L1] GPS-6030M-[L1]
Extension cable GPS-C01-[L2]
Amplifier GTA-120VN (Analog voltage output, I/O sink)
GTA-120VP (Analog voltage output, I/O source)
GTA-120AN (Analog current output, I/O sink)
GTA-120AP (Analog current output, I/O source)
Cable length Interconnecting
[L1]: Select from 0.5m or 2m
Extension cable [L2]: Select from 5m, 10m, 15m, or 20m
Standard detection object Iron (S50C, FC250), Stainless steel (SUS304, SUS430), Aluminum (A5052)
Rated detection range (F.S.) *2 0~6mm 0~12mm 0~26mm
Resolution ( ): Internal processing resolution 1μm(0.4μm)
Linearity error *2 ±0.15% F.S. (For calibration at 5 or more points )
±0.20% F.S. (For calibration at 3 points )
Temperature character *2 ±0.015% F.S./℃ or less *3
Sensor Heat Resisting -10 to +105℃, Heat-resistant type (option):-10 to +130℃
(Relay connector: -10 to +60℃)
2 x 102m/s2 {20G 200Hz, up/down 4h, forward/back 2h
Converter Ambient operating - temperature: 0 to +55°C, - humidity: 20 to 90 %RH (No condensation)
(Linearity error
Corrected point Select from 2 to 11 points.
Set the sensor position freely.
Digital filter (at -3dB) Between 1Hz and 1kHz
Preset The current sensor position is set to desired gap data.
Measuring function Peak, buttom, peak-to-peak, and sample HOLD
Judgment Judge the gap data, measured data, temperature data by LOW, GO, or HIGH.
Analog output Voltage output: 2CH (0 to 12V) or current output: 2CH (4 to 20mA)
I/O Input Preset, switching program, external measuring trigger, and measuring reset
Output System ready, RUN mode, Judgment (LOW, GO, HIGH), Measuring strobe

*1: L1: Sensor interconnecting cable length, L2: Extension cable length
*2: The detection object material is S50C, FC250, or SUS 430.
  For the other object materials, refer to the specification and instruction manual.
  (The rated detection distance is shorter than above materials, and the temperature character is more increased.)
*3: The “range less than a half of the rated detection range” is, for example, 0 to 6 mm range when the rated detection range (F.S.) is 0 to 12 mm.


  • PDF DownloadGPS-1718M-□
  • PDF DownloadGPS-2818M-□
  • PDF DownloadGPS-2824M-□
  • PDF DownloadGPS-6030M-□
  • PDF DownloadGTA-120□□

Application Introduction