76-RH Telescopic Transit Square (No Micrometer)

The 76-RH has precision telescope optics mounted on a solid-cast bronze horizontal axle which combine to produce a well-balanced instrument with feather-touch controls. The 76-RH is the undisputed "workhorse" of optical alignment, providing tremendous flexibility with substantial time and labor savings.

The versatile Brunson 76-RH transit combines the traditional main telescope with a fixed-focus cross telescope mounted in the horizontal axis of the instrument. This second telescope is fixed at infinity focus to make collimation or autocollimation with another instrument or a mirror quick and easy. This capability means that the 76-RH can be quickly made perpendicular to an optical reference line. By simply shifting from the main eyepiece to the cross-axis eyepiece, an operator can establish or verify his/her position relative to the basic reference line in seconds. This effectively requires only one technician, where previously two were required.

Patented ball bearing mounts permit accurate sweeping of both horizontal and vertical planes. The 76-RH employs a 194-TM coincidence level for precision leveling. The 194-TM has a 360-degree rotating turret to view the magnified bubble image from any position.

Micrometers are sold separately. Measurements from the optical reference line are taken by using an optical micrometer mounted on the main telescope. Please consider a model 190 optical micrometer or a model 160 coordinate micrometer. 

The 76-RH comes with a model 509 light source, a carrying case, set of adjusting pins, instruction booklet, and plastic cover.

The 76-RH is classified as National Stock Number (NSN) 6675-01-052-7029.

For additional general information about this instrument, read about our transits.

May Be Used With

160-x Series Coordinate Micrometers
190-x Series Optical Micrometers
186 Plastic Autoreflection Target
188 Glass Autoreflection Target
191 Combination Reticle Projection, Fixed Right Angle Eyepiece Unit (discontinued)
192 Auto-Collimation Unit (discontinued)
193 Right Angle Eyepiece (discontinued)
193-L Right Angle Swivel Eyepiece, Illuminated Adapter
196-1 Combination Projection, Auto-Collimation, Fixed Right Angle Eyepiece Unit

Although the 76-RH comes with its own light source, the following light sources will fit on the instrument:

• 509 Light Source
• 508 Light Source (discontinued)
• 504 In-line fiber optic light source (discontinued)
• 505-110, 505-220 Fiber optic light sources (discontinued)