Model 900LS – (Lazy Susan) Small Animal Stereotaxic Instrument

Product Description

Model 900LS (Lazy Susan) Small Animal Stereotaxic Instrument is an adaptation of the 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.

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 43.2 cm L x 25.4 cm (17” L x 10″) W base plate and is elevated to bring ear bar height
to 50 mm. Ear bar slots on the “U” frame have 0.1 mm verniers for ease in centering an animal. Ear bar zero to posterior end of base plate is 22.26 cm (8.763″).

Model 920 Rat Adaptor features include 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 included
(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 (17″ L x 10″ W)
Model 920 Rat Adaptor Including one set of Model 95718° Tip Rat Ear Bars
Model 960 Electrode Manipulator (0.1 mm res.) includingModel 1770 Electrode Holder with Corner Clamp


Model 900-E Lazy Susan Base Plate can be mounted to any Kopf 900 Series Stereotaxic frame.

Optional Accessories

Model 910 Rat Ear Plugs
Model 925 Swivel Mount
Model 935 Electrode Angle Calibrator
Model 940-B Digital Read-out Assembly
Model 943 Ear Bar Adaptor
Model 950 Removable Zero Point
Model 955 Non-Rupture 45° Tip Rat Ear Bars

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.

Rat Adaptors / Head Holders
Mouse Adaptors / Head Holders
Ear Bars