Thickness gauges from the QM20 series, featuring high resolution and an RS232 interface with a dual built-in oscillator.
It does not require external oscillator.

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    Terms and Conditions
    Lead time 4-6 weeks

    QM20-2-H / RS232 / High resolution / Dual oscillator

    EDFelectronics offers so called PC based thickness rate monitors QM20 series, which combine the functionality of an oscillator and measurement converter. All monitors are installed between sensor head and superior control unit (e.g. PC or PLC) on atmosphere. The transducer delivers information about quartz frequency, rate, thickness and crystal health via a serial line like RS232, RS485, USB or PoE QM20 series are available with standard and high resolution.

    Technical specifications: 


    RS-232 2-wire

    Resolution (@ 6MHz)

    0.01 Hz

    Frequency operation 

    6 MHz


    2 (Two channels with internal Built-in oscylator only )

    External oscillator

    YES - both channels

    RS cable length

    20m max (1.5 m included)