4.2 Resonators: measurement range 15 kHz to 20 MHz

Figure 4.5. Cross-section through the plane-concave resonator: (1) measuring volume; (2) plane transducer; (3) concave transducer; (4) adhesive joint with electrical contact to the liquid side; (5) quartz mount (V2A stainless steel); (6) rear electrical contact; (7) cell boundary; (8), (22), (23) thermostat channels; (9) filling and (10) ventilation capillary; (11) sealing rings; (12) base plate; (13) transmitter-side mounting plate; (14) tiltable frame for parallel alignment by means of ball joint (15), fine-adjustment screw (16), and compression spring (17); (18) receiver-side mounting plate; (19) ball guide; (20) spacer for fixing the cell length; (21) fastening screw; (24) protective walls for thermal shielding.