SEMITEC Corporation was established 1958 in Tokyo, Japan.
SEMITEC is a manufacturer who develops and produces high-classed leaded and epoxy coated thermistors based on a semiconducting ceramic resistor. All products are characterized by a high mechanical strength, superior thermal responsiveness, high reliability and extreme long life time at excellent price/performance ratio.
http://www.semitec.co.jp

TEWA Sensors was established 1964 in Lublin, Poland.
TEWA is a manufacturer who develops and produces high-classed assembled and customized temperature sensors. TEWA Temperature Sensors offers a wide range of standard and customized temperature sensors designed according to individual customer´s requirements covering applications in temperature range between -100°C and +600°C.
All products are characterized by a high mechanical strength, superior thermal responsiveness, high reliability and extreme long life time at excellent price/performance ratio.
http://www.tewa-sensors.com