WPI EVOM
| Objektnummer | B00017185 |
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| Seriennummer | 017185 |
| Nome oggetto | WPI EVOM |
| Stato | Archived Product |
Gruppo prodotti: Life Science / Biotecnologie
Status, terms of delivery and payment
Verification of devices
The second-hand devices are verified by Labexchange Service GmbH before delivery. You are receiving only fully functional devices.
Dispatch time
The stated dispatch times are the shortest possible ones for each article. The effective dispatch times can vary. The effective dispatch times will be stated in the order confirmation.
As a matter of principle, we are offering collective deliveries. The shipping time is calculated based on the position with the longest lead time. A partial delivery is possible on explicit request.
Shipping methods
Parcel services, forwarding agencies, self-pickup, delivery by Labexchange fleet.
Delivery information
Prices exclude shipping costs. Stated shipping costs are to be expected. Deviations are possible. If transport costs are not specified, please ask separately for them.
The stated transport and packing charges apply to the most favorable route if transport and are to be understood as subject to verification due to unexpected cost increases. By reason of unpredictable events, cargo rates and delivery times can change at any time and therefore have to be adapted to the recent situation. Import formalities and possible customs charges will be borne by the purchaser. Incoterm coding according to Incoterms 2010: For persons who collect the devices themselves: EXW, for dipatch by sea: CFR, by air freight: CPT, other shipments: DAP. Note for international shipments: A proof of preference/EUR1 will not be issued by us. When self-collecting/ordering EXW from countries within or outside the European Union, 16% VAT will be retained as a deposit until we have received the corresponding confirmation of arrival/bill of delivery from the buyer.
Terms of payment
We do not accept payment by letter of credit, PayPal, etc. In each case the invoice amount is payable without deduction. Discount is not granted.
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Country |
Possible payment methods |
Comment |
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DE, AT, CH |
Payment by invoice, payment in advance, payment by credit card |
Payment by invoice is only possible for corporate clients. |
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NL, BE, LU |
Payment by invoice, payment in advance, payment by credit card |
Payment by invoice is only possible for corporate clients |
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Other countries |
Payment in advance, payment by credit card |
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Our General Terms of Sale, Delivery and Payment are valid and are available for download here.
The goods are offered subject to prior sale.
Definition of status
All articles are used articles, except an article is listed especially as a new device.
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Status |
Condition |
Comment |
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Immediately available |
Used | The article is fully functional and in impeccable condition. It can be shipped immediately. |
| In stock |
Used |
The article is on stock. Our service technicians will verify the article before delivery. You are receiving only a fully functional article. |
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Published |
Used |
The article is still with the provider. After your order the article will be purchased and verified by us before being shipped to you. A certificate of operativeness as well as a service report are included in delivery. |
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New device |
new |
The article is brand new and unused. Regarding new equipment the guarantee/warranty conditions of the corresponding manufacturer apply. |
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Labprocure |
Used |
Labprocure GmbH, as the advertiser, is responsible for the content of this device offer. Labprocure assumes liability for the offers advertised here and for the photos and offer texts included. Labprocure GmbH, Bruckstraße 58, 72393 Burladingen. |
manufacturer : WPI
model : EVOM
annotation : Dokumente engl.
The following illustrations and descriptions refer to the instrument model and are drawn from brochures. They do not represent the scope of delivery. Please refer to the text of the offer for the exact scope of delivery.
TEER Measurement
Trans Epithelial Electric Resistance (TEER) Measurements
During the last two decades TEER measurements have become universally established as the most convenient, reliable and non-destructive method to evaluate and monitor the growth of epithelial tissue cultures in vitro.
The confluence of the cellular monolayer is quickly determined by a sharp increase in TEER. Recently there has been a significant surge of interest in introducing a combined electrode for resistance measurements in the Millipore 96-well
TEER measurement technology, which was first introduced by WPI in the mid-1980's, has since been perfected and expanded to include a range of TEER related manual and automatic instrumentation.
- Manual TEER measurement of epithelial cells in 24- and 96-well plates
- Battery powered electrically isolated meter
- AC current avoids adverse effects on tissue
- Compatible with Endohm chambers
- STX2 manual electrode enclosed with meter
- STX2 can be sterilized with EtO, alcohol or a bactericide
The EVOM was the first instrument designed specifically to perform routine TEER (Trans Epithelial Electric Resistance) measurement in tissue culture research.
The battery-powered EVOM produces an AC current that avoids adverse effects on tissues, which can otherwise be caused, by a DC current -- including electrode metal deposits.
The EVOM has an easy-to-read LC display and is also available with a BNC recorder output (EVOMX). Input impedance of the EVOM is greater than 1010 ohm, and resistance ranges from 0 to 1999 ohm; and 0 to 20,000 ohm can be monitored using the switchable range setting located on the instrument front panel.
One unique feature of the EVOM is that resistance readings are unaffected by membrane capacitance and membrane voltage. The membrane voltage reading range is ±200 mV. EVOM comes complete with the popular STX2 "Chopstick" electrode set. The STX2 consists of a fixed pair of double 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 cell culture wells.
STX2 can be used with all tissue culture inserts currently on the market. For more accurate quantitative measurements and/or for lower resistance measurements (e.g., endothelial tissue cultures) the EVOM can be used in conjunction with the optional Endohm chambers.
- BNC output for Data Acquisition System
- Toggle switch for continuous measurement
EVOMX is a modified version of the EVOM and is recommended for use with STX100 series electrodes. Its measurement switch and circuits have been modified to remain ON continuously.
This enables the user to have one hand free to move the electrode while using the other to note the readings. A BNC recorder output connector is provided on the EVOMX to permit direct recording of TEER measurements to a chart recorder or computer-based data-acquisition system.
STX100 Electrodes
- Designed for 24-well HTS plate (Corning Costar and BD Falcon) and with 96-well plates (Millipore and BD Falcon)
- Improved accuracy down to 5 Ohm
- Sterilized with EtO, alcohol or bactericide
With the development of a High Throughput Screening (HTS) protocol for faster drug discovery, a new line of cell culture filter plates have been introduced by several major cell culture insert manufacturers.
These HTS plates normally have either 24 or 96 individual cell culture inserts "bonded" together as one plate so that it can be handled by a robot apparatus. In response to these developments, WPI has developed an automatic REMS system and a manual electrode, STX100, for TEER measurements using HTS plates.
STX100's design is based on the same reliable design principle as the universally used STX2 electrode, with several important modifications. The size of the electrode tip has been reduced to 1.5 mm to facilitate positioning through the narrower slit of the HTS plate. The STX100 electrode itself is constructed using a stronger material for higher durability and maximum usage applications. The bottom section of the electrode is shaped to fit neatly into the "keyhole" shaped filter well.
This enables the STX100 electrode to produce increased accuracy and reproducibility of TEER readings (±5?) compared to the standard STX2. Several versions of STX100 are available, designed to fit the Corning Costar 24-well HTS plate, the Falcon 24 well HTS plate, the Millipore Multiscreen CaCo 96-well plate, and BD Falcon HTS 96-multiwell plate. Measurement can be directly performed when the HTS plate is in either a common or divided tray, reducing the possibility of contamination as well as mechanical damage to the cultured cells.
