What type of level sensor are you using? The positioning of the sensor will be dependant upon what type you are using. Information on the material being stored and the means of filling would also be useful.

It is important to realise that the filling technique (pneumatic or mechanical) can have a major influence over the profile and symmetry of the top surface of the inventory - which in turn will have an influence on the positioning of whatever type of device you are using. The discharge pattern will also have an impact on the accuracy of the equipment employed on the vessel, since (depending upon the characteristics of the bulk solid) it is not unknown for a vessel operating in core (funnel) flow to cease flowing whilst level probes indicate there is still material present - as a result of the "dead zones" of material that can develop around the flanks of the vessel.

Richard Farnish

mailto: r.j.farnish@gre.ac.uk

http://www.bulksolids.com ■

Location of the level sensor would depend upon:

1.Type of the sensor you have

2.Properties of the materials being stored

3.Design of the bin/hopper (size, mass flow or funnel flow, etc.)

If you can give this information, I will be glad to help you.

Regards,

Amrit Agarwal (Tim)

Pneumatic Conveying Consultants ■

For humid materials capacitance type probes are not recommended because of resulting errors in measurement of the capacitance and potential build up of material on the probe's surface.

I guess that the probe is located at the bottom of the cyclone receiver to make sure that there is no build-up of the material in the receiver.

I think that a better option in this service is a vibrating type level probe.

Regards,

Amrit Agarwal (Tim)

Pneumatic Conveying Consultants

polypcc@aol.com, or

pccsolids@aol.com ■