Epithelial Volt/Ohm (TEER) Meter EVOM2

Epithelial Volt/Ohm (TEER) Meter EVOM2

Non-destructively test for epithelial monolayer confluence in 2D cell cultures

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  • Description

Epithelial Volt/Ohm (TEER) Meter EVOM2

Making TEER Measurements to Determine Cellular Confluence

The EVOM was the first instrument designed specifically to perform routine Trans Epithelial Electrical Resistance (TEER) measurement in tissue culture research. EVOM2™ is the next generation, redesigned for ease of use. The EVOM2™ not only qualitatively measures cell monolayer health, but also quantitatively measures cellular confluence. The unique electronic circuit of the EVOM2™ and the included STX2  electrode detect the confluence of the cellular monolayer. When combined with WPI’s Endohm chamber, the EVOM2™ can also be used to perform more accurate quantitative measurements or lower resistance measurements like transendothelial electrical resistance measurements. 

Isolated battery power for 10 hours of use

The isolated power source of the EVOM2™ was specifically designed to avoid adverse effects on tissue and the formation of electrode metal deposits, even when it is plugged into a standard wall outlet. Now, the EVOM2™ is always on when you need it. In addition, its rechargeable battery allows up to 10 hours of mobile use.

Accurate reading every time

The four-and-a-half digit readout provides a range of 1-9,999 Ω. The included test electrode lets you calibrate the resistance measurements for an accurate reading every time, and the voltage meter never needs calibration. An analog BNC output is standard with the EVOM2™, providing an output port for recording data or remote display of the EVOM2™output.

Electrode pair to measure voltage, pass current

EVOM2™ comes complete with the popular STX2 “chopstick” electrodes, 4 mm wide and 1 mm thick. Each stick of the electrode pair contains a silver/silver-chloride pellet for measuring voltage and a silver electrode for passing current. The small size of each electrode is designed to facilitate placement of the electrodes into a variety of standard cell culture wells. 

  • Measures trans-epithelial electrical resistance or trans-epithelilal voltage
  • Compatible with 12 and 24 well culture plate systems out of the box
  • Includes industry standard STX2 hand held “chopstick” electrodes
  • Analog output for recording resistance or voltage measurements
  • Auto ranging from 0-10 KΩ
  • Battery powered
  • Manual TEER measurement of epithelial cells in 6, 12, 24 and 96* well plates
  • BNC output for data acquisition system
  • Compatible with EndOhm chambers
  • *96-well plate measurement requires an STX100 series electrode.
  • Choose Resistance Range: 0-10 KΩ (EVOM2) or 0-100 KΩ (300523)
  • See Details for part numbers and descriptions


  • You can verify performance and calibrate the meter for TEER function using provided test resistor
  • Battery powered meter is portable
  • A variety of accessory electrodes are available for measuring TEER in 6- and 96-well fixed (HTS) and removable well culture systems (See STX100 series and Endohmelectrodes)


  • TEER and trans-epithelial voltage measurements in 2D cell cultures

Specyfikacja urządzenia:

  • Membrane Voltage Range +/-200 mv
  • Resolution 0.1 mV
  • Resistance Range 0 to 9999 Ω *   
  • Resistance Resolution 1 Ω
  • AC Square Wave Current +/- 10uA nominal at 12.5 Hz
  • Power Internal rechargeable 6V NiMH
  • 2700 mAH batter with external 
  • 12VDC Supply for recharging
  • Nomimal Battery Run Time 10 hours
  • BNC Output  1-10 V (1 mV/Ω)
  • Dimensions 19x11x6 cm (7.25x4.25x2.30")
  • Weight 1.4 kg (3 lb.)
  • Electrode Connection RJ-11 connector (telephone style)
  • Test Resistor External, 1000 Ω 
  • Environmental Range 10-38°C (50-100°F) 
  • 0-90% non-condensing relative humidity
  • Power Supply Universal 100-240 VAC, 120 VDC (5.5 x 2.5mm barrel positive tip), 850 mA