Instrument for the determination of sperm concentration, allows to determine the number of spermatozoa in each ejaculate and calculate the doses to produce. SperMed sse is a portable photometer with microprocessor with advanced optical system based on LED with narrow band interference filter that allows most accurate and repeatable readings. The instrument is protected against splashing water and the optical system is protected from dust and dirt by a transparent cup. Equipped with a locking mechanism that allows to place the cuvet in the same position. Light Source: LED; power supply: 1 x 9 volt batteries, 40-hour use; auto off after 10 minutes of inactivity.