Industrial Factory Automation

Endress and Hauser has brought out the Liquiphant M, a meter that provides online measurement of density and concentration. A built-in density calculator can be end-user customised with complex tables and mathematical interdependencies, allowing the meter to provide the same kind of density and concentration measurements once possible only with lab instruments. Because the Liquiphant M provides online measurements, it allows control systems to react much faster to changing process conditions. Instead of waiting for results to come back from the lab, a control system can take corrective action immediately by performing closed-loop control. The Liquiphant employs a mechanically oscillating fork with two tines that are each excited to resonant frequency. The frequency changes when the fork is immersed in any liquid. If the vibration falls below a predetermined frequency, the sensor reports the covered state to subsequent switching electronics. The tines are excited by a piezoelectric dri...

Willtek Communications has announced the 4933 RF Shield, supporting radiation and quality measurements at large radio transceivers, notebook PCs and other electronic equipment. It combines a high shielding factor with easy access to the unit under test. The 4933 RF Shield attenuates signals from outside or inside by a high degree. The attenuation, in conjunction with the RF connector, enables radio-frequency and quality engineers to measure the radiation of the device under test in an EMC prequalification test, without the need to rent a large anechoic shielded chamber. Other applications include transceiver tests in a controlled environment. Willtek's 4933 RF Shield comes with a solenoid lock and a control panel displaying the status of the lock. Due to a USB interface, an external PC can read the status and release the lock remotely.