Sensor Solutions Holdings (SSH) is a diversified manufacturer of specialized sensor equipment. To date, SSH is composed of two operating companies. Nielsen-Kellerman (www.nkhome.com) is a leading manufacturer of portable devises to measure environmental conditions for use in agriculture, fire fighting, industrial hygiene, mining, military and various recreational markets. Amptek Inc. (www.amptek.com) designs and manufactures instrumentation used in numerous non-destructive testing and elemental analysis applications. Amptek was sold to a strategic buyer in 2014.