Physiology

The EVOM™ family of TEER measurement meters have been cited in over 16,000 peer-reviewed, scientific journal articles. The EVOM™ Manual has been designed to improve workflow efficiency, increase stability, and provide more repeatable measurements than older Trans Epithelial Electrical Resistance (TEER) meters including the Millipore MilliCell® ERS-2, Millipore MilliCell ERS and World Precision Instruments EVOM2, EVOM and EVOMX. Here’s a quick summary of benefits of the EVOM™ Manual versus the MilliCell ERS voltohmmeter...more

Overview of the MICRO-ePUMP

Designed to simplify intracellular injection and a variety of other microinjection tasks, the MICRO-ePUMP uses carefully regulated air pressure for injecting cells with fluid. Injected volumes range from picoliters to nanoliters. Timing, injection pressure and compensation pressure are adjusted independently using the touch screen interface. Time intervals can range from 2 seconds down to 10 ms or less, depending on the injection pressure setting. The injection pressure interval is triggered using the foot switch.

The MICRO-ePUMP is designed to inject very small quantities of fluids, such as drugs, into cells or small organelles. Two different positive pressures may be applied with a precision timing circuit that switches between the two pressure automatically.

• The port supplies positive pressure for high-pressure ejection.
• The pressure port maintains a low positive “compensation” pressure to the injecting...more

The World Precision Instruments (WPI) EVOM² is used for making trans epithelial electrical resistance (or TEER) measurements. We recommend that you test your EVOM2 before you use it for the first time and then periodically after that. If there is a concern that the meter or the electrode is not functioning properly, test the meter first. This video shows how to test the meter.

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