英国Westlock西锁是世界上著名的阀门位置监控产品制造商。主要产品有：旋转阀门位置***器、线性阀门位置***器、阀门定位器、微动开关、位置变送器、接近开关等。

产品在中国石化、电力等领域有着广泛的应用。产品型号：

EC2000,AccuTrak2200,AccuTrak2600,AccuTrak3400,AccuTrak4000,AccuTrak4040,4080,AccuTrak9900,9918,E9920,E9881,Micro Switch V3,V5,MAGNUM XT-90,3479,Micro Switch V5J012BB1D,V5B010CB3D,NJ2-V3-N,AccuTrak 

2004 AN,TCRMVAZ,2004AN-BY-2DPDT-16PT,2007X-BY-E76
2007X-BY-E183,2085A-2DPDT-CS,2147-BY-00-22AD-000,2249-BY-00-22AD-000,
2402ZSC20709,2402ZSC20714,2640-BY-CS-02AD-000,2640-BY-N-015-02BHP-00,4-20mA ATEX Eexd II CT6,2645-BY-00-2200-000,
2869-00-00-2200-000  2SPDT 2XM20 2A/24VDC Eex d II CT6,4080-BY-2SPDT,4080-BY-K10,3447ABTN00022ABC-00（2247-BY）,722A-BY-M19-FIO-4300-MO,9479-BY-2SPDT,BA-FIS-657/667 30-70,ICoT 5230-NI-E-HK-A-O-B,ICoT 5310I-ISE V B A2BN,PB306-BY00 22AD,
M20 to 1/2NPT-PLUG-069 转换接头,2640-BY-CS-02AD 
722A-BY-Q300 西锁-000,（2640-BY-N-015-02BHP-00） 
722-BY-M9-FIO-4300 
2645-BY-00-2200-000,
2645-BY-00-22AD-000,
2645-BY-CS-22AD-00,
2645-BYK00022FAN-00,
2646-BY-00-22AD-000,
2647-BY-00-22AD-000,
2648-BY-00-22AD-000,
2649-BY-00-22DW-000,
2649-BYK00022BSW-00,
2649BYK00022BSW-00,
2649BYN00022BNF-00,（2649BYS00022BNF-00）,
2649BYN00022BER-00,
2649BYN00022ADZ-00,
2649BYK00022ADZ-00,
2649BYS00022BDV-00,
2649-BY-KOCS-22AAA-00,
2649-BY-00-22AD-000,
2869-00-00-2200-000,
2269-00-00-2200-000,
2260-00-CS-0200-000,
2245BYN00052BCG-00,
2245-BY-00-22AD-000,
2245-BY-22AD-000,
2246-BY-00-22AD-000,
2245-BY,
2247-BY,
2265-00-00-2200-000,
2249-BY-00-22AD-000,
2246-BY-00-22AD-000,
2247-BY-000-22AD-000,
2247-BY-00-22AD-000,
2147-BY-00-22AD-000,
2147-BY-00-22VK-000,
2147-BY-00-22ZB-000,
2085A-2DPDT-CS,
2085A-NO-D36,
2085A-NO-D34,（2085A-2DPDT-CS）,
2004AN-BY-2DPDT-16PT,
2004AN-BY-2DPDT,
2004A-BY-2SPDT-UK,
2004A-BY-2DPDT,
2004N-BY-2DPDT-UK,
2004-BY-C16,（2004A-BY-2DPDT）,
2004SFC2A2MO4CSV）,
2004SFC2A2M0200,
2004SFC2A2M0200U,
2004SF2A2M04CSU,
2004SBY2A2M0200,
2004AN-BY-2DPDT-16PT,
2004NBY2A2M0200,
2004NBY2A2M0400,
2004NBY2A2M040000412,
2007KBY2B4M0200U,
2007SBY2B2M02CS45U,
2007SBY4E2M0300-UK,
2007-BY-2M2-1M4-UK,
2007-BY-2SPDT-UL,
2007X-BY-E76,
2007X-BY-E183,（2007X-BY-2DPDT-CS）,
2007XN-BY-2SPDT,
2007X-BY-2SPDT,
2007X-BY-E15,（2007X-BY-2DPDT-CS）,
2007X-BY-E96,（2007-BY-2M2-1M4-UK）,
2007X-BY-E76,（2007X-BY-2DPDT-CS-OK）,2402ZSC20709,
2402ZSC20714,
4080-BY-2SPDT,
4330-NI-E-HB-A-0-B,
1040SFC2A2M0200,
1040-BY-N-2SPDT,
1065-2SPDT-UK,
3447ABTN00022ABC-00,（2247-BY）,
3465-00-CS-22AD-000,
346700S0CS22FAD-00,