ENFR

Tuesday, 13 April 2021

Micro-wave Detector




 
Functioning :

The Microwave Pulse Sender-Receiver System is composedof electrical isolation units : the sender unit and the receiver one.

The sender emits a burst of microwave energy towards the receiver. This burst of energy is transmitted approximately 200 times each second.

When the line-of-sight between the sender and receiver is clear, the receiver will detect each of these bursts. If the line-of-sight is interrupted by a sufficiently reflective or absorbent material the energy will not detect the transmission.

The receiver is designed to switch a relay when the beam is cut. In each case the relay will switch only after the detector state has been maintained (since its change) for the respective time: any further change of state during a time out period will override the previous change.

The sensitivity of the detector is adjusted by a potentiometer that can compensate for partially reflective or partially absorbing materials. In the same way, it can be adjusted so that it will change state when only a fraction of the beam is blocked. There are two sensitivity adjustment potentiometers.

The relay can be set to either energize or de-energize when the beam is broken. This mode is set via a two-position slide switch in the receiver unit.

In the receiver unit there are three LED lamps :

  • 1 LED indicates that power is applied
  • 1 LED indicates that a valid signal is detected
  • 1 LED indicates that the relay is energized


Main Advantages :

  • Low frequency for dusty environment
  • Replacement for gamma ray
  • Easy to install
  • Measurement during filling or emptying
  • High and bottom level detection
  • Detection without any contact with the product, suitable for high temperature and big particle size, and hard applications.
  • Level detection for big bag

 

News

20-23 April 2021, Bundaberg (Australia) :

ASSCT Industry equipment exhibition 2021, exhibitor and poster presentation.



 


 

September 29-30, 2021, Hotel Manaira, João Pessoa, Paraíba (Brazil) :

SEMTEC 7º Seminário Técnico da Indústria do Cimento e Cal