PRODUCT PRESENCE DETECTOR
DOCIL 501B probe

The 501B probe is a product presence probe. It can be installed, for example, in piping where a lack of circulating product trips an alarm.

It can also be installed at the tank base and serve as a low level detector.

Product presence detector - Larco

The Docil sensor comprises a glass cone and an electronic circuit with, among other things, an infrared luminous signal transmitter and a receiver.
The Docil sensor works on the optical reflection/refraction principle.

DOCIL sensor characteristics

  • Accuracy: 0.1 mm
  • Response time: 1 ms
  • This sensor is ATEX certified

When the glass cone is not immersed in the liquid, the optical signal is reflected entirely towards the transmitter :

Conversely, when the cone is immersed in a liquid (hydrocarbon), the luminous signal is refracted and the receiver no longer receives the signal, thereby triggering an alarm :

PRODUCT PRESENCE DETECTOR DOCIL C 501B probe

DOCIL C 501 B DETECTOR CHARACTERISTICS

 Detection : Optical

Connection : 1¼” NPT

Simple wiring : a single one-pair cable (such as 01-IP-09-EG-FA) is necessary to connect a probe with one or two sensors to the processing system