Skip to main content

Model 900LS Small Animal Stereotaxic Instrument

Model 900LS (Lazy Susan) Small Animal Stereotaxic Instrument is an adaptation of our Model 900 Small Animal Stereotaxic Instrument. The unique style base plate allows the entire base plate with “U” frame to be rotated through 360°, easily changing its position for the researchers access to the experiment at hand. There is a locking screw that allows the unit to be secured in place.

The instrument consists of a rugged “U” frame to which is affixed a Model 960 three-dimensional Electrode Manipulator. Model 1770 Standard Electrode Holder with corner clamp is included.

Manipulator X,Y, Z adjustment – Metric scale 80 mm travel, calibrated 0.1 mm vernier scale.

Angle adjustment – Fully universal joint calibrated on two planes for access from any angle. Vertical alignment pin can be removed for angled settings from 0° – 90° either side of vertical, 2° increments. Manipulator swivel design has been improved with a locking mechanism for off-plane presentations. A precision t-bolt locking mechanism will insure that manipulator angle is held firmly in place to provide positive angle presentations.

Rotation adjustment – Manipulator swivel base can be rotated up to 360°. Manipulator X/Z axis can be repositioned at 90° increments.

The stereotaxic frame is mounted to a 13.9”L x 10″W base plate and is elevated to bring ear bar height to 53 mm. Ear bar slots on the “U” frame have 0.1 mm verniers for ease in centering the animal. Ear bar zero to posterior end of base plate is 8.763″.

Model 920 Rat Adaptor includes a nose and tooth bar assembly offering various stereotaxic adjustments.

Dorsal/Ventral adjustment dial – Calibrated in 100 micron increments, 1 mm per revolution.

Dorsal/Ventral adjustment – 30 mm

Dorsal – 10 mm above ear bar zero

Ventral – 20 mm below ear bar zero

Adaptor Plate A/P adjustment – 44 mm

Ear Bars – Model 957 18° Tip Rat Ear Bars

(6.3 mm square with 35 mm of calibration).

Model 900LS Standard Accessories

(supplied with Model 900LS)

Model 900 Stereotaxic “U” Frame Assembly

Model 900-E Lazy Susan Base Plate

Model 920 Rat Adaptor including one set of

Model 957 18° Tip Rat Ear Bars

Model 960 Electrode Manipulator (0.1 mm res.) including

Model 1770 Electrode Holder with corner clamp

Our instruments were designed for versatility. Any standard accessory, that is not required, can be omitted and the appropriate accessories can be added for your specific research.


  • Quality, versatility and ability to perform are guaranteed by David Kopf Instruments.
  • Combines student level operating simplicity with research quality and accuracy.
  • Permits accurate and reliable stereotaxic placement.
  • Several atlases in current use are based on the Kopf Model 900’s dependable parameters.
  • Modular accessories allow for expansion of instrument capabilities.
  • Adaptable for use with a wide variety of small animals.