Abstract: A disposable sensor for metal analysis comprises a housing including a first section, a second section, and a flexible intermediate section therebetween. An ampoule containing a reagent is disposed in the intermediate section. A liquid seal is formed between the first and second sections. The intermediate section of the housing of the disposable sensor may be flexed to break the ampoule. When the seal is broken between the first and second sections, and the water sample mixes with the reagent, the mixture flows into the second section containing an electrode assembly. The electrode assembly may be disposed in engagement with the monitoring device to determine the concentration of the at least one metal in the water sample.

Abstract: An ergonometric transcutaneous electrical nerve stimulator especially designed for dysmenorrhea and low back pain. The ergonometric factors include a housing containing the electrical circuit, the housing being of a generally flattened disk shape with well rounded edges. A first power switch is located on a side edge of the housing, and one or more rocker switches controlling the amplitude of the current stimulation pulses to be supplied by one or more channels from the stimulator are mounted on a side edge of the housing. The housing of the stimulator has one or more attachment points on the side edge of the housing to allow for connection of the housing to a body or garment strap.