DUELCO公司是歐洲主要生產傳感器,繼電器的生產廠家,產品廣泛用于港口,碼頭,鋼廠,電廠,化工,石油,煤炭行業。
 丹麥DUELCO傳感器，DUELCO繼電器主要型號有：TST-3、SSN-2003、NST-2004、EU-10、EU-2001、HR-20、SSO-10、DSM-M、DSM-221。

SSO-10 Standstill Monitoring Relay
Designed for 1-and 3-phase motors
Can be used in applications with frequency converters
Microprocessor controlled
2 NO safety outputs and 1 NC signal contact
10 A contact load
Status indication with LEDs
Detachable terminals
(By 2-channel operation of 23-24,33-34,41-42)
Category 3/4, EN 954-1