World Precision Instruments

Search the site by KEYWORD


Quick Finder


Testimonials

Nicholas James, King's College London

Customer service was always quick and very helpful. Products all arrived quickly, were fully set up for us and have proved to be of good quality.
read more

Accessories For EVOM Manual TEER Meters

Accessories For EVOM Manual TEER Meters

Includes electrodes compatible with the EVOM Manual and  EVOM3


Which EVOM™ Electrode is Right for Your Application?

WPI’s EVOM™ Manual is the gold standard for delivering stable and repeatable Trans Epithelial Electrical Resistance (TEER) measurements. The EVOM™ Manual is the newest TEER meter. It qualitatively measures cell monolayer health and quantitatively measures cell confluence by determining an increase or a plateau in tissue resistance detected using our innovative EVOM™ technology. WPI’s state of the art EVOM™ technology provides you with real-time, valuable feedback during experimental measurements.

Electrode options are available for use with the new EVOM™ Manual. Here we will compare these options so you can choose one that’s right for your application.

  • With STX electrodes, you can measure inside the well plate. The STX4 electrode is our new and improved version of the STX2-PLUS electrode. It has removable blades.
  • STX HTS electrodes are ideal for high throughput screening (HTS) plates.
  • EndOhm electrodes by design are considered more accurate in capturing smaller changes. However, cell culture inserts need to be physically moved out of the plate to the EndOhm chamber for measurement.

EVOM Electrode Comparission

This figure demonstrates how the EVOM™ electrodes measures TEER. With a fixed centered electrode geometry of the EndOhm, the variation of readings on the same sample is 1-2 Ω, as compared to 5% of the total reading using the STX2 electrodes. An EndOhm, together with the EVOM™ Manual, offers the most accurate, convenient and economical solution for trans membrane electrical resistance measurement.

For automation of TEER measurements, consider the REMS AutoSampler that integrates a robotic system and computer interface to automatically measure tissue resistance in 24- and 96-well plates. 

EVOM Electrode Comparison Chart

Download the electrode comparison chart. 

STX4

STX4 in useThe STX4 electrode is the general-purpose electrode for the manually operated EVOM™ meters like the EVOM™ Manual and EVOM3. With an adapter it may also be used with older versions of the EVOM and Millicell® meters. It is balanced and weighted for hands-free operation, and the shallow electrode tips require less fluid than previous hand-held electrodes. Its design offers greater precision when compared with the STX2 and STX3. This electrode is the only one with replaceable blades. This means you never need to chloride the tips, and you may replace the blades instead of the entire electrode. This extends the life of your electrode. The STX4 is designed for use with 24-well plates.

STX HTS

STX HTS and EVOMThe STX HTS electrodes are designed for high throughput screening, because the tips are much smaller, and the electrode is keyed to fit neatly into the filter wells. The design improves accuracy over the STX2 and STX3, and it is more durable, too. The size of the electrodes and the design reduces the chances of sample contamination. This is an excellent choice for 24- and 96-well plates. (TITLE: Corning 96, Corning Biocoat/Falcon 24, Corning Costar 24, Millipore 96)

EndOhm

EndOhm and EVOMEndOhm cell culture cup chambers are built for stability and reproducibility to 1% tolerance. These chambers are ideal when precision counts. Three sizes are available: 6mm, 12mm and 24mm for 24-, 12- and 6-well plates. The tri-leg supports provide mechanical stability and holds the membrane parallel to the electrodes. The symmetrical electrode pattern disperses the test current uniformly, giving the most accurate reading of all the EVOM electrodes. However, each well must be individually positioned inside the EndOhm chamber to make a reading.

 

The EVOM™ Manual requires an electrode for use. Choose an electrode suitable for your application.

Cell Culture Insert/Transwell Type Electrode Advantages Disadvantages
Removable 24-well STX4 No need to transfer inserts. Take measurments in the plate.  
Removable 24-well EndOhm-6 Most accurate mode of measurement, because of the larger electrode surface area and the concentric positioning of the electrodes. Need to transfer inserts into the EndOhm chamber for making measurements.
Removable 12-well EndOhm-12
Removable 6-well EndOhm-24
24- or 96-well High Throughput Screening (HTS) Plates STX HTS  Fits perfectly in the measurment plate. Choose the option based on your specific plate.  

 

 

 


EVM-EL-03-03-01

EVM-EL-03-03-01

STX4 EVOM™ Electrode with Removable Blades for TEER in 6.5 mm Inserts

View details...

EVM-EL-03-01-01

EVM-EL-03-01-01

ENDOHM-6 EVOM™ Electrode for TEER in 6.5 mm Insert, for use with EVOM Manual a...

View details...

EVM-EL-03-01-02

EVM-EL-03-01-02

ENDOHM-12 EVOM™ Electrode for TEER in 12 mm Insert, for use with EVOM Manual a...

View details...

EVM-EL-03-01-03

EVM-EL-03-01-03

ENDOHM-24 EVOM™ Electrode for TEER in 24 mm Insert, for use with EVOM Manual a...

View details...


Choose Quantity
EVM-EL-03-02-05

EVM-EL-03-02-05

STX HTS EVOM™ Electrode for TEER in MatTek 96

  • Compatible with EVOM Manual and EVOM3 meters
  • For MatTek 96-well plates
  • Exclusively compatible with Evom Manual


Choose Quantity
EVM-EL-03-03-02

EVM-EL-03-03-02

STX HTS EVOM™ Electrode for EVOM Manual, use with Millipore Multiscreen HTS 96-Well Plate

  • For Millipore Multiscreen HTS 96-Well Plate
  • Mini XLR end connector for direct connection to EVOM Manual and EVOM3 meter
  • Compatible with legacy meters including EVOM2 & Millicell ERS meters with the addition of connector EVM-AC-02-01-01.


Choose Quantity
EVM-EL-03-03-03

EVM-EL-03-03-03

STX HTS EVOM™ Electrode for EVOM Manual, use with Corning Falcon HTS Multi Well Insert System

  • For Corning Falcon HTS Multi Well Insert System
  • Mini XLR end connector for direct connection to EVOM Manual and EVOM3 meter
  • Compatible with legacy meters including EVOM2 & Millicell ERS meters with the addition of connector EVM-AC-02-01-01.


Choose Quantity
EVM-EL-03-03-04

EVM-EL-03-03-04

STX HTS EVOM™ Electrode for EVOM Manual, use with Corning Costar HTS Transwell-24

  • For Corning Costar HTS Transwell-24
  • Mini XLR end connector for direct connection to EVOM Manual and EVOM3 meter
  • Compatible with legacy meters including EVOM2 & Millicell ERS meters with the addition of connector EVM-AC-02-01-01.
     


Choose Quantity
EVM-EL-03-03-05

EVM-EL-03-03-05

STX HTS EVOM™ Electrode for EVOM Manual, use with Corning HTS 96-Well Plate

  • For Corning HTS 96-Well Plate
  • Mini XLR end connector for direct connection to EVOM Manual and EVOM3 meter
  • Compatible with legacy meters including EVOM2 & Millicell ERS meters with the addition of connector EVM-AC-02-01-01.


Choose Quantity
3993

3993

Use with electrodes with 2 mm pins. Do you want to connect a different electrode to your EVOM2? This adaptor fits into the EVOM2 RJ-11 plug and provides a 2mm pin port for each of the four RJ-11 leads.

EVM-AC-03-01-01

EVM-AC-03-01-01

Electrode Blades for STX4 EVOM™ for TEER, 3 Sets

View details...


Choose Quantity
300749

300749

EVOM3 USB drive 32GB, programmed with Python digital output package


Choose Quantity
803025

803025

EVOM3 replacement power supply, 5V 5W AC/DC External Wall Mount Mini-B connector

99672

99672

EVOM3 Legacy Adaptor

View details...


Choose Quantity
99916

99916

EVOM3 EndOhm cable, for use with EVOM3

Our Clients Include:

GlaxoSmithKline
University College London
Novartis
Imperial College
University of Cambridge
University of Oxford

Keep in Touch

We promise NEVER to share your details with anyone. You can opt out at any time.