Electrical, optical, [ acoustical, ultrasonic, ] chemical and laser scientific and laboratory instruments for [ counting, ] sizing, classifying, differentiating, grading and identifying particles in solids, * OR * liquids [ or gases ], for use in clinical, biological, industrial, medical, environmental, academic and scientific research and commercial laboratories; instruments for measuring particle [ speeds, mobility, and distribution, and for monitoring airborne or pneumatically carried particles in liquid or gases ] ; instruments employing ultraviolet-visible-infrared (UV-vis-IR) optical absorption, [ ultrasonic absorption, and turbidity monitoring, ] for measuring particle properties, [ transmitters and receivers, ejectors, dryers, and separators; ] instruments for measuring rheological properties, namely, viscometers, rotary and capillary rheometers; measuring apparatus and instruments, namely, rheometers for measuring rheological properties of fluids * AND * suspensions, [ gels and solids; ] viscosimeters; [ and torque electrical transducers; instruments for measuring dimensional information of particles through image formation and analysis, namely, particle size, shape, structure and composition analysers; ] particle size and shape distribution and concentration measuring instruments, namely, [ particle counting instruments, air and liquid particle counters, ] photocorrelation spectroscopy instruments, instruments for producing zimm plots to determine the molecular weight of polymers; instruments and apparatus for performing chromatography, for the measurement of weight, size, and viscosity of particles, molecules and macromolecules; [ acoustic spectroscopy instruments, laser diffraction measuring instruments, all for use in clinical, biological, industrial, medical, academic and scientific research and commercial laboratories; ] particle charge measuring instruments, namely, [ zeta potential measuring instruments, ] electrophoretic mobility measuring instruments, particle mobility measuring instruments, Ph measuring instruments, micro electrophoresis measuring instruments, all for use in clinical, biological, industrial, medical, academic and scientific research and commercial laboratories; [ sedimentation, sieve, diffraction, and zeta potential laboratory instruments; ] apparatus for preparing samples, suspensions, [ sprays, ] and emulsions of particles for use with any of the aforesaid goods, namely, [ sample dispersion units, stirred cells, ] autosamplers, dry powder feeders, dispensers, autotitrators, nebulizers, ultrasonic baths, pumps, degassers, detectors, columns and temperature controllers, sample grabbers, extractors, fluidisers, diluters, concentrators, separators, dispersion units, measurement cells, auto-sampling units, automated preparation stages; instrument controllers, namely, computers, digital signal processors and microprocessors, computer software for controlling and operating all of the aforesaid goods and for controlling copier and powder quality; software for chemical analysis of spectroscopic data to produce chemical image maps that identify the chemical components of a surface; machine readable data carriers namely, solid state memory devices, optical and magnetic storage media disks, magnetic tapes, all sold pre-programmed with control or analysis programs for use with the foregoing goods; and replacement parts for the aforesaid goods