BCH Electric Limited manufactures Oil Tight Limit Switches. BCH Electric Limited has been awarded ISO 9001:2000 certifications. BCH Electric Limited supplies low voltage electrical and electronic controls. Oil Tight Limit Switches are designed to operate in highly contaminated atmospheres and extremely high shock and vibration conditions. Oil Tight Limit Switches off the assembly line passes through rigid tests before being operational in the field. The "Set Back" head design of these switches offers greater structural rigidity. These limit switches are completely oil tight, water tight and dust tight, provide ample space at terminals for easy wiring and the contacts have thermoplastic barriers to prevent short circuit.