Principle : 

High-frequency microwave pulses issued by the guided wave radar propagate along detection components (steel cable or steel rod), met the media to be measured, since the dielectric constant of the mutation, cause reflections, a portion of the pulse energy is reflected back. Transmit pulse and the reflected pulse is proportional to the distance and the time interval measured media.

Common technical specification :

Suitable for Medium    : Liquid, solid powder 

Explosion-proof Grade :  Exia IIC T6 Ga/Exd IIC T6 Gb

Measuring Range         : up to 30m

Frequency                   : 500MHz-1.8GHz

Accuracy                     : ±10mm

Process Temperature:?-40?400??

Process pressure      :?-0.1?40?MPa

Signal output           :?4?20?mA/HART

The Scene Display    : Four LCD/Can be programmed

Power Source           : Two-wire (DC24V)

                              :Four-wire?DC24V/AC220V?

Shell                       : Aluminum /Plastic

Connection: Flange  / Thread
Antenna                  : single cable/ double cable/ single road/ coaxial tube
                                 / PTFE or PVDF coating cable and rod 

Application   : Liquid / solid /powder measure,
                       : Acids/ Bases / alkaline / other corrosive media
                       : cement silo powder/ Ash powder 
                       :  Measuring No ion water, deoxygenated water  

Form more detail please contact company for detail cateloge with model no,