Pcme Limited

Envea UK Ltd

Michael Rigby

William John Averdieck

John Rogers

Gary Paul Cullen

Victor Frederick Thomas

Colin Baker

David Unitt

An apparatus () for monitoring particles flowing in a stack (), comprises: an electrical-interaction monitor () operable to provide a signal () resulting from electrical interaction of the particles with the monitor (). a scattered-light monitor () operable to provide a signal () resulting from detection of light scattered from the particles, and a controller () arranged to alter the calibration of the electrical-interaction monitorin response to changes in the relative magnitude of the electrical-interaction (signal) and the scattered-light signal ().

Methods and apparatus for monitoring particles flowing in a stack

An instrument () for monitoring particles () flowing in a stack, includes: (a) a light source for providing a light beam (); (b) a sensor/and (c) a probe housing. The housing comprises: (i) a mount (); (ii) a proximal portion () including a first aperture () through which in use the light beam () exits; (iii) a distal portion (), including a second aperture () through which the light beam () enters after having been scattered from particles () flowing in the stack, and a focusing mirror () arranged to reflect and focus the scattered light (); (iv) a medial portion (), connecting the distal portion () to the proximal portion (); (v) a waveguide (), passing from the distal portion () through the medial portion () and the proximal portion () to the sensor and arranged to guide to the sensor the light () reflected and focused by the focusing mirror ().

Monitor for monitoring particles flowing in a stack

A particle detector for detecting particles flowing in a duct has a first triboelectric probe ( ) for detecting the particles and a second triboelectric probe ( ) for detecting a signal generated by contaminants on the particle detector. The presence of signal-generating contaminants on the particle detector will result in an error signal on the first probe ( ) and a signal on the second probe ( ). Therefore, the presence of a signal on the second probe ( ) will indicate that the signal appearing on the first probe ( ) includes an error signal. If the ratio of the magnitude of the signal generated on the second probe ( ) to the magnitude of the signal generated on the first probe ( ) exceeds a certain pre-defined limit, cleaning of the detector will be required.

Particle detectors

An apparatus for detecting particles in a flow comprises a probe,positioned so that it projects into the flow and is charged triboelectrically by the particles in the flow. An electric circuit is coupled to the probe,and includes evaluating means for monitoring a signal from the probe,and for providing an output in dependence on the signal generated by the triboelectric charging of the probe,The part of the probe,that projects into the particle flow comprises an electrically conducting core covered with an insulating layer,which insulates the core from the particle flow.

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Ramsey, United Kingdom

Michael Rigby