The 6200 VF Series range of TDR (Time-Domain Reflectometry) products is ideal for the measurement of liquids, powders and granules to a range of 24m. Unaffected by pressure, temperature, viscosity, vacuum, foam, dust, changes in dielectric constant or coating of the probe, the VF Series can measure virtually any product in Direct mode utilising any one of its seven probe types.

Pulses of low power microwaves are guided along the probe.  At the point where the waves meet the product surface they are reflected back.  The intensity of the reflection is relative to the dielectric constant of the product being measured. The higher the dielectric constant the stronger the reflection will be. 

Probe types and their application

The coaxial probe type is mainly used for clean liquids with a very low dielectric, such as LPG, LNG, solvents, NH3, Foam, alchohol, oil/water separators.  Suitable for a maximum tank height of 6 metres.

The coaxial probe is tolerant of liquid agitation or flow, and can be used in situations where there is liquid or vapour spray present.

The mono rod and mono cable types are suitable for higher viscosity clean liquids or waste liquids and fine powders. Cement, limestone, flyash, Alumina.  Highly viscous liquids, plastic powders & plastic granules.

The twin cable types are used for the higher range applications, tanks and silos with liquids and granules.  They are suitable for tanks with no head clearance and can be mounted close to the tank wall.  They are suitable for products with a high or low dielectric.

Tank farms, plastic granule silos, light powders, LPG, LNG, LH3, spheres, alcohol and water storage level.