The system maintains constant the electrical resistance measured between the low resistance pipette fluid, and the fluid being measured by generating an equal and opposing pressure which is measured by standard pressure transducers.

Specially developed circuitry matched to the hydraulic properties of the glass micropipettes allows one to measure pressures through tip openings as small as ½ micrometer ID, with high resolution and fidelity.

Frequency response linear from DC to 30 Hz.

Linear output throughout the measuring range. Measures positive pressures to a maximum value of 200 mm Hg.

Can be utilized with glass pipette with inside diameter tips ranging from 0.5 to 1.5 micrometer.

Continuous monitoring of system condition during operation, including simultaneous internal video presentation of pipette resistance, bridge unbalance, bridge resistance, capacity compensation, and output power.

A BNC video output connector is provided so the video presentation can be connected to an external monitor.

A special quadrature phase inner feedback system is incorporated to automatically correct for phase errors so as to maintain servo-null phase detector operation at maximum sensitivity.

• Input preamplifier with automatic capacitance compensation feature.
• Processing amplifier.
• Electro-hydraulic voltage to pressure converter.
• 2 micro-cannulae holders.
• Test chamber for micro pipettes.
• Complete operating instructions including electronic and hydraulic checkout.