The QMB6 quartz measurement box product range for coating thickness measurement has now been expanded to include the PRO series. In addition to transmitting frequency information for up to two measuring heads, the rate and coating thickness are now also calculated internally in the device instead of using external software. The Modbus protocol for the RS232, RS485, USB, or Ethernet IP/PoE interface enables quick integration into OEM systems. Alternatively, a conventional ASCII protocol is also available. The entire QMB6 series can be equipped with up to two integrated oscillators, eliminating the need for external oscillators.