CHI1550A Solution Dispenser

The CHI1550A solution dispenser is designed for making high density and high accuracy solution arrays,
which can be used in chemical, biological and medical applications. The solution dispenser consists of a highresolution three-dimensional positioner, a piezoelectric jetting device, and a sample platform, as shown in Figure 1.

The three-dimensional positioner can travel 50 mm in all three directions with 0.1 micrometer resolution,
allowing high-precision patterning. This is particularly important when multiple overlapping solution components
need to be dispensed.
The jetting device can dispense single drops of solutions with viscosity less than 40 centipoise and surface
tension in the range of 0.02-0.07 N/m. Solutions with properties outside these limits can be jetted if changes to the
properties can be achieved with solvents or changes in temperature. With a default nozzle size of 60 microns, the
jetting device can produce drops ranging from 100-200 picoliters in volume, depending on the operating parameters
and solution composition.
The CHI1550A solution dispenser control software is very user-friendly for creating binary, ternary and
quaternary arrays of spots containing mixtures of solutions. Instead of using a manually created look-up table for
solution dispensing patterns, pattern creation is facilitated by our software, which can also provide commonly used
patterns as a default for binary, ternary, and quaternary arrays. The positioner can memorize certain critical positions,
such as the solution loading point and first dispensing point, allowing the jetting device to go to these positions
easily and quickly.
The array pattern can be examined graphically, and it will also be displayed during the dispensing process.

System requirements
Operating System: PC with Microsoft Windows 98/NT/Me/2000/XP/Vista/7/8
Communication: USB or RS-232 serial port

Hardware Specifications