Shown: TRIO-235 with Sutter IPA® headstage (not included)

3-axis / 0-90 Diagonal Micromanipulator System

Ideal for in-vivo work, the TRIO™-235, replaces the Z-axis and replaces it with an adjustable diagonal axis. This configuration pairs a traditional X and Y-axis with a diagonal axis that can be adjusted in angle with a set screw. The diagonal features 50 mm of travel, with 25 mm of travel in the X and Y-axes. On this model, we have added software to create a synthetic "Z-axis" by combining the Diagonal and X-axes in reverse of how we create a synthetic diagonal axis on our other manipulators. The TRIO-235 features a precision bearing and lead-screw design.

The TRIO-235 controller employs a combination of state-of-the-art software and mechanical design that eliminates the need for the motor to remain powered on during recording, thus eliminating the heating effects of the motors and giving us the electrically quietest manipulators in the industry. This stability ensures that Sutter manipulators will not drift in the middle of experiments.

The compact design of the integrated Rotary Optical Encoder (ROE) controller uses minimal bench space; provides quiet, fan-free operation; and is easy to use. No rack mounted controller is required. Position coordinates, in relative or absolute values, are displayed directly on the ROE. The TRIO manipulators use a logarithmic acceleration algorithm that eliminates the need for speed selection. As the knobs on the ROE are turned faster, acceleration ramps up. This allows for smooth and intuitive motion control of electrode position without the need to stop and change speeds or lift your hand from the knobs. A Y-axis lockout function (accessible by DIP switch) is also available, allowing X/Diagonal-only axial movement during HOME and WORK repositioning.

Five conveniently located buttons control all the functions you will need in normal operation. Press and hold the [WORK] button to quickly store a work position; pressing [WORK] after this will return the manipulator to the same location. [HOME] sends the manipulator to a second position, often set for a point furthest from the microscope, which is useful for rapid pipette exchange. Pressing [SPEED] allows the selection of one of 4 speed ranges. With practice, there is no need to ever change speeds, however, we have included three low speed ranges for those who work at very high magnification. Holding [SPEED] for three-seconds will lock the knobs out, to prevent accidental movement. Display coordinates can toggle between relative and absolute by pressing the [RELATIVE] button; holding the button down will zero the relative coordinates. Finally, [PULSE] activates a pulse movement mode that produces small, rapid bursts of motion that can be advantageous for cell penetration with sharp electrodes. Hold [PULSE] for three-seconds to set or modify the angle the diagonal axis is positioned at. This allows the controller to calculate the synthetic “Z-Axis”.

Designed with maximum flexibility in mind, a DIP switch on the controller changes the directional movement of the ROE knobs to accommodate the preference of the user. The TRIO-235 comes standard with a universal mounting system suitable for the most popular headstages or pipette holders.

  • Three independent axes - 25 mm orthogonal travel in X, Y and Diagonal
  • Software-based “Z-axis”
  • Sub-micron (less than 100 nm) resolution
  • Fast movement with a top speed of 3 mm/sec (while homing)
  • Mechanically robust construction for high stability
  • Compact, fanless, user-friendly ROE controller preserves bench and rack space
  • Carries up to a kilogram
  • Push button control of multiple functions - WORK, HOME, SPEED, PULSE and RELATIVE
  • Suited for in vitro and in vivo electrophysiological recording
  • Universal mounting system for headstage or pipette holder
  • DIP switches on ROE select direction of movement produced by turn of ROE knob
  • USB interface for computer control


25 mm on X and Y / 50 mm on diagonal

Long Term Stability
< 1.0 micron in 4 hours

Control Box
5.5 in x 8 in x 4 in | 14 cm x 20 cm x 10.2 cm

Weight (mechanical)
2.8 lbs | 1.3 kg

Weight (Controller)
2.2 lbs | 1.0 kg

115/230 Volts
50/60 Hertz power line

TRIO-235 CE Certificate

US Prices > TRIO™-235
International prices vary by country. Please contact your local distributor or Sutter Instrument for a quotation. Prices subject to change without notice.

Basic systems include the manipulator, controller, rod holder, 4 inch dovetail extension, mounting adapter plate, Z-axis vertical extension, cables, and power supply

Catalog Number Description Price
TRIO-235 3-axis manipulator (X, Y and diagonal) and controller $ 8,970
MT-78-FS Fixed platform stage with imperial/standard holes, chamber insert and gantry supports $ 4,695
MT-78-FS/M6 Same as above with M6 tapped holes $ 4,695
MT-75 Standard gantry stand 8.7 to 13.4 in (22.1 to 33.9 cm) $ 1,016
MT-75S Short gantry stand 6.7 to 9.6 in (16.9 to 24.4 cm) $ 1,016
MT-75T Tall gantry stand 10.7 to 15.4 in (27.1.9 to 39.1 cm) $ 1,156
MT-75XT Extra tall gantry stand 14.7 to 18.5 in (37.4 to 47 cm) $ 1,156
MT-81-DOV81 MT-81 stand with 8 inch dovetail $ 755
MT-81-DOV121 MT-81 stand with 12 inch dovetail $ 755

285204 4 inch dovetail extension $ 82
265210 Mounting adapter plate $ 86
225RBI Rotating base $ 930
221165 Z-axis vertical extension $ 129
BR-AW Rod holding clamp for XenoWorks® injectors (for rod OD 2-4mm) $ 125
BR-AW-L Long rod holding clamp for XenoWorks® injectors (for rod OD 2-4mm) $ 147
MP-RISER-0.52 1/2 inch riser $ 165
MP-RISER-1.02 1 inch riser $ 226
MP-CLIP3 Rod holder (for rod OD 1 mm to 4 mm) $ 125
MP-ROD Rod holder (for rod OD 6.25 mm or larger) $ 125
EHOLDER Micropipette holder - 1.0-1.5 mm glass $ 147

1 Useful for low profile stereoscopes and microinjection
2 Risers can be combined to achieve desired height
3 Suitable for multi-electrode probes

For detailed information on mounting our micromanipulators, refer to the Mounting Systems section or phone for assistance.

MT-1078 / MT-2078
MT-1000 / MT-2000
MD Series