Thin Film Measurement

Measurement Transducer QMB6

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The QMB6 quartz measurement box combines simplicity of operation with unrivaled accuracy in a compact form factor, delivering precise measurements at up to 0.01 Hz frequency resolution for 2 sensor channels.

You can purchase the Measurement Transducer QMB6 directly in our Onlineshop.

Features & Benefits

  • 2 independent measurement channels
  • High frequency resolution of up to 0.01 Hz
  • ModBUS protocol for ease of integration
  • 4 communication interface options: RS232/RS485, USB or Ethernet (PoE)
  • Includes low noise integrated oscillator
  • Unmatched low-cost compact unit performance
  • All connecting cables, power supply and Windows Software included

Quartz sensors can be either directly connected utilizing the integrated low noise oscillator or linked via external oscillators when the QMB6 is installed at larger distance from the sensor.
The QMB6 is available with 4 hardware communication standards RS232/485, USB and LAN/Ethernet with PoE option. The latter simplifies installation in an Ethernet infrastructure network.
Monitoring and data logging can be performed by either using the supplied Windows software or by integration into a host environment utilizing the industry standard ModBUS protocol.

Software Screenshots

Connection examples

Quartz oscillator type4 - 6 MHz
Frequency resolution0,1 Hz bei 10 Samples/s (standard version)
0,01 Hz bei 10 Samples/s (high resolution version)
Sampling frequency0,5 to10 Hz
Reference frequency stability0,5 ppm
Sensor input2 x BNC female
InterfacesRS-232, RS-485, USB, Ethernet (PoE)
Supply voltage12 - 24 V DC for RS-232/RS-485;
5 V DC for USB
48 V DC for LAN/Ethernet, PoE IEEE 802.3af
Supply currentmax. 500 mA for both channels
Operation temperature15 °C to 40 °C
Dimensions106.5 mm x 61.3 mm x 26 mm (RS-232/RS-485 Version)
96.4 mm x 61.3 mm x 26 mm (USB Version)
116.4 mm x 61.3 mm x 26 mm (Ethernet Version)
Weight~0,2 kg
Windows Software (included)Provides datalogging functions for up to 253 units, Ethernet option extends number of units to unlimited; all service
operations, including IP address seng, factory parameter restore and firmware upgrade



Passive external oscillator incl. 10 cm BNC cable (BT-QM-EO)


Mounting brackets for QMB6 or oscillator (BT-QM-MBS/BT-QM-EO-MBS)

Accessories cables

BNC cable

Accessory test quartz crystal

Test quartz crystal