Function And System Design; Measuring Principle; Measuring System - Endress+Hauser Nivector FTI26 Technical Information

Measuring principle

Measuring system

4

Function and system design

The sensor surface of the Nivector evaluates the different dielectric values of air and bulk solids. If
the bulk solids come into contact with the sensor surface, the electronics change the switch status.
The Nivector can be switched to either minimum of maximum fail-safe mode, ensuring quiescent
current operation in all applications. The switch status is indicated by an LED. A guard electrode
eliminates interference factors due to the vessel wall or possible buildup, for example.
Depending on the fail-safe mode selected and the level, the Nivector switches and signals in the
following cases:
• When point level is reached
• In the event of a problem
• In the event of a power failure (electrical switch is locked)
The measuring system comprises a Nivector point level switch, e. g. for connecting to PLCs or an IO-
Link master as per DIN EN 61131-9. A suitable miniature contactor or a solenoid valve can be
connected directly to the point level switch.
 1 Application examples
1 Overfill protection or upper level detection (MAX)
2 Dry-running protection or lower level detection (MIN)
System integration
For devices with IO-Link, an IO-DD is available in the Downloads area of the Endress+Hauser website
→  15.
Nivector FTI26
1
2
Endress+Hauser
A0035880