title: A solid state laboratory timer for viscosity measurement.
abstract: A low cost timer originally for use with the Harkness Viscometer is described. The timer, which may be used as a general purpose laboratory stop watch, is quiet in operation and counts to 99 seconds with 0.01 second resolution.
mesh_terms: D019411:Clinical Laboratory Techniques / Q000295:instrumentation*; D006801:Humans; D010949:Plasma; D014783:Viscosity