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  • 2017.11 First in the industry! Unbreakable in cutting oil and oil mistDigital Gauge (contact-type displacement sensor)Release of SA Series Air Purge Specification

2017.11 First in the industry!
Unbreakable in cutting oil and oil mistDigital Gauge (contact-type displacement sensor)Release of SA Series
Air Purge Specification



Citizen Finedevice Co., Ltd.

Citizen Finedevice Co., Ltd. (Head Office: Fujikawaguchiko-Machi, Minamitsuru-Gun, Yamanashi Prefecture. President: Ryuzo Kondo) has released a new digital gauge (contact-type displacement sensor) to measure dimensions in an automated inspection line during the manufacturing process. SA Series Air Purge Specification is the first digital gauge in the industry to prevent any foreign matter from entering, and it is operable even in an environment where the gauge is exposed to direct contact with cutting oil.

Digital Gauge (contact-type displacement sensor)SA Series Air Purge Specification

■ Model No. 2 Models
  • SA-S110AP (Graduation 0.1μm)
  • SA-S510AP (Graduation 0.5μm)
  • ■ Date of Release December 1
    ■ Price SA-S110AP 108,000 yen + Tax   SA-S510AP 78,000 yen + Tax

    The digital gauge (contact-type displacement sensor) detects the spindle’s movement when a probe touches an object to be measured with an internal sensor and quantifies the variation. It is mainly used in automated lines within manufacturing processes that require high-precision measurement. Ever since the SA Series was released in 2015, the series, featuring a robust body, has enjoyed a good reputation for its precision and durability, which are approximately 20 times higher than those of conventional products. The series is capable of highly accurate counting using the absolute method and has eliminated the need for zero-point adjustment.

    Cutting and polishing processing sites have recently faced the necessity to increase production efficiency by performing the electrical measurement of dimensions in processing machineries. However, as the cutting oil used during processing is highly permeable, the existing digital gauges with rubber bellows (expansive rubber pipe) specifications are incapable of preventing the permeation of cutting oil or foreign matter from entering the detector when a rubber bellow breaks.

    This new product adopts the air purging method, replacing rubber bellows, and supplies air to the detector body and increases the inner pressure to prevent foreign matter from entering, meaning that it is even operable in a harsh environment where it is exposed to contact with cutting oil and the like.

    Main features

    • Capable of measurement inside processing machinery where the gauge is exposed to cutting oil by reducing foreign matter that enters it with air purging.

    • Capable of highly accurate counting and no need for zero-point adjustment.

    • Robust body that ensures high durability.


    Automated inspection line within manufacturing process (parts cutting, polishing, cutting, assembly, etc.)

    Target industries

    Automobile parts industry, bearing industry, electronic component industry


    Model SA-S510AP SA-S110AP
    Measurement range 10mm
    Resolution 0.5μm 0.1μm
    Indication accuracy (P-P)*2 2μm 1μm
    Measuring force*3 1.5N to 3N
    Supplied air pressure 0.05 to 0.1MPa
    Mass Approx. 160 g
    Operating temperature/humidity range -10℃ to 55℃
    35% to 80%RH
    (with no condensation or icing)
    Storage temperature/humidity range -20℃ to 60℃
    35 to 80%RH
    Grounding method Capacitor grounding
    Cable Sold separately as an option
    Measurement terminal Ceramic ball Φ3.175 mm

    *1 The first digital gauge with air purge specification in the industry. As of November 27, 2017 according to the company’s own research.

    *2 When the ambient temperature is 20℃.

    *3 The value varies depending on the supplied air pressure.

    Contact Us

    Contact information for the press
    Citizen Watch Co., Ltd.
    PR IR Section Ohdate, Mitome
    TEL 042-466-1232 (Direct)
    Contact information for general customers
    Citizen Finedevice Co., Ltd.
    Sales Group, Industrial Equipment Department
    TEL 0555-22-1141 (Direct)