An instrument for determining level or plumb orientations includes an elongated body having a plurality of orientation measurement devices. Each of the orientation measurement devices can indicate either a level or plumb orientation depending on a position of the instrument. The orientation measurement devices each include a chamber having front and rear convex sides, a fluid contained in the chamber, and an air bubble floating in the fluid. The elongated body includes a set of first openings and a set of second openings. The orientation measurement devices are embedded into the elongated body through the first set of openings and the orientation measurement devices each include bubble therein viewable from the front and back of the elongated body. The bubble is also viewable from the top and bottom of the elongated body through the second set of openings.

A laser level alignment tool is shown. The laser level alignment tool includes magnetic mounts located along a perimeter of body. A laser level is coupled to the body off center from a center point of the laser level alignment tool. The magnetic mounts may be height adjustable relative to the body.

A plumb-bob device has an enclosure with three lasers projecting from one end, one of which projects a horizontal lane, one in a vertical plane, and one with crossed planes from a laser that is suspended to swing but not rotate about an axis. The device may be attached to an object to be leveled or plumbed, and moving the object until the lasers coincide accomplishes plumbing the object.

An alignment system transmitting a laser light at a predetermined angle. Selected embodiments can be utilized to measure distance.

An effective inexpensive, compact and easy-to-use self-leveling laser level capable of projecting at least two laser beams at any desired angle dialed on a 360-degree format.

The present invention is a specialized laser alignment tool for locating at least one roofing penetration point for a conduit installation. The specialized laser alignment tool is fixably mountable to and self-centering on an electrical hub and projects one or more roofing penetration points which are in vertical alignment with the electrical hub.

The present invention is a specialized laser alignment tool for locating at least one roofing penetration point for a conduit installation. The specialized laser alignment tool is fixably mountable to and self-centering on an electrical hub and projects one or more roofing penetration points which are in vertical alignment with the electrical hub.

A measuring-robot device for fully mechanized coal mining faces and an automatic measuring system are provided. The measuring robot includes a suspension cage, a total station, a prism and an industrial computer. Firstly, the suspension cage with automatic leveling function is fixed on the top beam of a hydraulic support, then the total station and the industrial computer are fixed in the suspension cage, and finally the prism with a plug connector is installed under the base of the total station, forming a measuring-robot device. According to the fluctuations of the fully mechanized coal mining face, several measuring robots will be deployed along the fully mechanized coal mining face, and the adjacent measuring robots are line of sight to each other, forming the automatic measuring system covering the fully mechanized coal mining.

A measuring-robot device for fully mechanized coal mining faces and an automatic measuring system are provided. The measuring robot includes a suspension cage, a total station, a prism and an industrial computer. Firstly, the suspension cage with automatic leveling function is fixed on the top beam of a hydraulic support, then the total station and the industrial computer are fixed in the suspension cage, and finally the prism with a plug connector is installed under the base of the total station, forming a measuring-robot device. According to the fluctuations of the fully mechanized coal mining face, several measuring robots will be deployed along the fully mechanized coal mining face, and the adjacent measuring robots are line of sight to each other, forming the automatic measuring system covering the fully mechanized coal mining.

A plumb bob for detecting differing fluids in tanks and vessels includes a tubular housing having enclosed ends. An LED infrared transmitter disposed in the tubular housing transmits infrared signals through fluids in which the plum bob is immersed to a LED infrared receiver. Circuitry disposed within the housing provides power to the LEDs and operates an LED driver to determine fluid parameters for the types of fluids in which the plumb bob is immersed. One or more vibration signal generators emits different vibrations according to the types of fluids detected. The vibration signal generators transmit the vibrations from the housing through a gauge tape line to a gauge tape reel held by an operator, who can determine the fluid types by the vibrations.