Westlock创建于1984年，是世界的阀门控制监视器的制造商，*有超过100，000只阀门采用了Westlock的产品，Westlock一直奉行不断创新，不断研发的精神始终保持水平。主要产品有：旋转阀门位置监视器、线性阀门位置监视器、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。

主要产品：旋转阀门位置监视器、线性阀门位置监视器、阀门定位器、微动开关、位置变送器、接近开关、限位开关、阀位开关。

常用型号：2640-BY-CS-02AD-000,
2645-BY-00-2200-000,
2645-BY-00-22UT-00,
2645-BY-00-22AD-000,
2645-BY-CS-22AD-00,
2645-CSF1
2649-CSF2
2645-BYCS22AD000,
2649-BYKOCSAAA00,
2649BYK00022BSW-00,
2645-BYK00022FAN-00,
2645BYN00022FAN-00
2645BYK00022BUQ-00
2645BYK00022SAC-00
2646-BY-00-22AD-000,
2647-BY-00-22AD-000,
2648-BY-00-22AD-000,
2649-BY-00-22DW-000,
2649-BYK00022BSW-00,
2649BYS00022QAM-00
2649BYN00022KAQ-00
2649BYK00022BSW-00,
2649BYN00022BNF-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,
2004AN-BY-2DPDT-16PT,
2004AN-BY-2DPDT,
2004A-BY-2SPDT-UK,
2004A-BY-2DPDT,
2004N-BY-2DPDT-UK,
2004-BY-C16,
2004SFC2A2MO4CSV）,
2004SFC2A2M0200,
2004SFC2A2M0200U,
2004SF2A2M04CSU,
2004SBY2A2M0200,
2004AN-BY-2DPDT-16PT,
2004NBY2A2M0200,
2004NBY2A2M0400,
2004AN-BY-C302,
2004NBY2A2M040000412,
2007KBY2B4M0200U,
2007SBY2B2M02CS45U,
2007SBY4E2M0300-UK,
2007-BY-2M2-1M4-UK,
2007-BY-2SPDT-UL,
2007X-BY-E76,
2007X-BY-E183,
2007XN-BY-2SPDT,
2007X-BY-2SPDT,
2007X-BY-E15,
2007X-BY-E96,
2007X-BY-E76,
2402ZSC20709,
2402ZSC20714,
4080-BY-2SPDT,
4330-NI-E-HB-A-0-B,
1040SFC2A2M0200,
1040-BY-N-2SPDT,
1065-2SPDT-UK,
3045-BY-00-22AD-000
3046-BY-00-22AD-000
3047-BY-00-22AD-000,
3049-BY-00-22AD-000
3645-BY-N-ACA
3447ABTN00022ABC-00,