SKU: 7482927520

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

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Description

STX4 EVOM Electrode with Removable Blades for TEER in 6.5 mm InsertsElectrode for EVOM3 and EVOM Manual with Replaceable Blades Ensures Stable Measurements The STX4 electrode is the most recent version of chopstick electrode for the EVOM3 and EVOM Manual and it is designed to facilitate measurements of voltage (potential difference: PD) and resistance (transepithelial electrical resistance: TEER) of cultured epithelia (cellular layer) grown onto permeable membrane inserts in 12 and 24 well tissue culture plates. STX4

Electrode for EVOM3 and EVOM™ Manual with Replaceable Blades Ensures Stable Measurements

The STX4 electrode is the most recent version of chopstick electrode for the EVOM3 and EVOM™ Manual  and it is designed to facilitate measurements of voltage (potential difference: PD) and resistance (transepithelial electrical resistance: TEER) of cultured epithelia (cellular layer) grown onto permeable membrane inserts in 12- and 24-well tissue culture plates. STX4 can measure directly inside the well plates with 12 and 24 inserts. The STX4 is designed primarily for 24-well hanging inserts or transwells (e.g., Corning 3470), and the electrode’s best performance can be seen in this format.

Benefits

  • Replaceable blades – This new STX4 electrode has replaceable electrode blades.

  • No chloriding necessary – Electrode tips are specially coated, requiring no chloriding (maintenance step) to ensure proper electrode functionality when measuring TEER of cellular layers like epithelial cultures. Chloriding was necessary for the  STX2-PLUS.

  • Less liquid volume needed – This electrode requires with less liquid volumes than required for STX2-PLUS electrode to keep the tips immersed and able to provide stable readouts.

  • Hands-free operation – The STX4 electrode fits perfectly in 24-well hanging transwells cell culture well plates and can stay hung on top of these transwells, allowing for hands-free operation.

  • Greater precision – The STX4 electrode offers better TEER measurement precision, because it eliminates the variability factors resulting from change in electrode spacing and positioning as seen with STX2 electrode.

  • Shielded from radio frequency interference (RFI) – This STX4 electrode has a shielded cable and eliminates or minimizes any interference (from electrical sources or cell phones) affecting the TEER measurement read outs.

The STX4 electrode sits on the well for hands-free operation, and the adjustment ring lets you place the electrode blades in the well exactly where they need to be, suspended in solution without touching the membrane or the bottom of the cell culture well plate.

NOTE: Improve your TEER measurement precision with the older EVOM2 by swapping out the STX2 or STX3 with the new STX4. STX4 can be used with the EVOM2 (previous model) by using the EVM-AC-02-01-01 adapter, which is sold separately.

 

Shipping Notes
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Exchange/Return Notes
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SKU: 7482927520

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4.5 ★★★★★
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Nanou
Fort Morgan, US
★★★★★ 5
good toy for heavy chewers
Color: Blue Shark, Size: Medium
My dog loves this toy. It is tough and has a nice squeak. The only thing that bothers me a bit (it doesn't bother the dog) is the plastic tail gets rough with the chewing.
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Reviewed in the United States on June 11, 2026
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Jen
Birmingham, US
★★★★★ 5
Just buy it!!!!
Color: Blue Shark, Size: Medium, Color: Blue Shark, Size: Medium
5 stars so far! My beefy boy is obsessed with this toy. He’s a TOUGH chewer. It fits perfectly in his mouth and it’s definitely tough! Feels thick & sturdy, has no weird smell. He loves the squeaker and he’s been (trying) to tear it up non stop since I gave it to him! Lol. He wore himself out. Definitely ordering more. Love the different animals !
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Reviewed in the United States on June 11, 2026
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Rosemarie
Alexandria, US
★★★★★ 4
Durable and fun toy
Color: Blue Shark, Size: Medium
My granddog really likes this toy. He is a pit bull mix. The middle is where the squeaker is. Toy is hard plastic and he chewed on it a long time. No damage to toy! The only reason I gave it a 4 and not a 5 is how loud it is bouncing on wood floors. The toy I do recommend. Good size and bright blue color fish.
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Reviewed in the United States on June 5, 2026
C
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Cheryl Otis
Omaha, US
★★★★★ 5
TRULY INDESTRUCTIBLE!!!
Color: Blue Shark, Size: Medium, Color: Blue Shark, Size: Medium
This toy is truly indestructible. I have purchased several toys over the past few months, all have been detroyed except for this one. It may not look as pretty now but it is still intact and still squeaks. I highly recommend for anyone with truly aggressive chewers.
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Reviewed in the United States on May 29, 2026
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CHAOS
Fort Morgan, US
★★★★★ 5
Make sure you get this brand. The look alikes are trash!
Very durable and fun! My Pitbull chews on this constantly and loves to have treats or peanut butter, put in the bottom of it as an extra treat. A friend of mine bought a similar looking toy that was destroyed by her pitbull in moments. This one is better quality and has stood the test of this power chewer. The rubber is very thick and he chews it constantly but it stays in tact. It is soft enough to squeak if he gets a hold of it just right, but that’s the rare treat. The size is perfect for my 80 pound boy. I am also able to throw these toys in his pool for him to dive for them. Definitely in great value for the price.
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Reviewed in the United States on March 19, 2026

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