The Magne-Sonic Series 100 is a two wire device which may be installed in any position in a pipe or vessel to detect the presence of a liquid.
The Series 100 has a tuning fork style probe which vibrates at its natural frequency when in air. A piezoelectric crystal system is used to create a 1200 Hz vibration in the tuning fork. As the tuning fork is covered by a liquid or slurry, a corresponding shift occurs in the vibrating frequency of the tuning fork. This shift is being monitored continuously and once a present threshold is exceeded, the output changes status.
A standard two core cable is used to connect the switch in series with the load. The solid state output stage acts as a simple SPST switch, operated by liquid presence.
When specifying the standard 2-wire output version, the switch may also be interfaced directly to a 3 wire 24VDC PLC using a third PLC terminal on the circuit board. When relay output is required a SPDT dry contact output version is available with selectable high or low level fail-safe.
The new option "W" provides a unique step change output for 2-wire 24VDC applications. This option is similar to the DIN 19234 (NAMUR) Switching Levels except it is not suitable for I.S. applications - drawing 16.8 MA when "on" and 6.0 MA when "off'. See Larger Image