Westlock創建于1984年，是世界的閥門控制監視器的制造商，全世界有超過100，000只閥門采用了Westlock的產品，Westlock一直奉行不斷創新，不斷研發的精神始終保持水平。主要產品有：旋轉閥門位置監視器、線性閥門位置監視器、閥門定位器、微動開關、位置變送器、接近開關等。產品在中國石化、電力等領域有著廣泛的應用。

主要產品：旋轉閥門位置監視器、線性閥門位置監視器、閥門定位器、微動開關、位置變送器、接近開關、限位開關、閥位開關。

常用型號：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,
3465-00-CS-22AD-000,
346700S0CS22FAD-00,
3445-BY,
3479-TT2,
3460A00SOCS01AAA-00,
3447SBYS00022BNE-00,
3447ABYN00022ABC-00,
3447ABY-00-22AD-000,
3447ABY-00-33AD-000,
3447BYN00022ABY-00,
3045-BY-00-22AD-000,
3046-BY-00-22AD-000,
360NCMBYM6BC122AAA-UK,
360NCMBY2M6XSO2600-UK,
360NCM-BY-D14,
360NBY3B2M0200U,
360-BY-M2,
9044-BY-2SPDT-UK,
9468NBY2M12(3)3/4-UK,
9748,
9479-BY-2SPDT,
9479N-BY-DT,(9479NDT),
9479DT,9479SBY2B2M06DTU
9479-N-BY-PTB-BBC-U,
C9479N-BY-2SPDT,
E9479-BY-2SPDT-UK,
2549BYSECC21BDB-00,
722ABYM9FIO4200M-UK,
711NBY1A2M0900I2700U,
711NBY2M9FIO5700UK,
5230-NI-E-HK-A-0-B,
5330-IS-E-VB-A-2-B-N,
5330-IS-E-VB-A-0-B-N,
5330-IS-E-V-B-A-0-B-N,
5310I-ISEVBA2,
DVC 2000
DVC 6000
784-BY-M2-FSO-4200-MO,(IWLS784M2FSO4200MO),
ICOT 5230-NI-E-HK-A-O-B,
ICOT 5310H-SEVBA2BN,
BA-F1S-657/667 30-70,
PB306-BY-00-22AD,
SW-010302UK ,
SW-040302UK ,
SB40557,
XT-90LP 0550 6880
PB308-BY00-22AD,
B-SW-10000? XT906850,
LD NO:S-2007F-MA-CS2,
XNNN-02T0,XNNN-02A0
81-20516-A2,
11-12310-00,
21-11510-A2,
70-15541-531,
DXP-M21GNEB,
TXP-L22GLEM,
TXP-L22GNE,
TXP-L22GNEM,
DVC-AS-Z2-B-P,
DVC-AS-Z2-B-P-S45,
ZNB327A002,
STN16-SPDT,
GGBA-0124,
H2-1Z43C3G411,
2549BYSECC21BDB-00
2249BYS00021CDB-00
3447-BY-00-22DW-000
3447SBYS0CS22AAA-00
C3479-NO-W300
34793B2M0600019U
8649-DB18
8649-DB23-NR1
8649-DB22-NR1
722SBY1A2M1200I570MU,
722SBY1A2M0800530MU,
722SBY1A2M1200530MU,)
2147-BY-00-22AD-000
B-VA-30060,(VA30060)
B-VA-30016-004
BOLT SWITCHES – BM SERIES
BOLT SWITCHES – BF SERIES
BFT1C3-1,BFT1C3-2,BFT1C4-1,
BFT1C4-2,BFT2C3-1,BFT2C3-2,
BFT2C4-1,BFT2C4-2,BMT1C3-1,
BMT1C3-2,BMT1C4-1,BMT1C4-2,
BMT2C3-1,BMT2C3-2,BMT2C4-1,BMT2C4-2