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BIOPAC Hardware | EL250 SERIES | Page 1 - 2 Updated: 11.4.2013
ELECTRODES
In selecting the application site for any style of electrode, care should be taken that:
1) Electrode site is dry and free of excessive hair.
2) Electrode is not placed over scar tissue or on an area of established erythema or with a lesion of any kind.
3) Skin is properly prepared. (Prepare the skin at the electrode site. Use the ELPAD to lightly abrade the skin
surface. Use a brisk dry rub to prepare the application site. Avoid excessive abrasion of the skin surface.)
EL250 Series Reusable Ag-AgCI Electrodes
Surface biopotentials can be accurately and clearly transm
itted with silver-silver chloride electrodes. EL250
Series reusable electrodes are permanently connected to 1-meter leads and terminate in standard 1.5 mm female
Touchproof sockets for direct connection to the SS1L shielded electrode lead adapter. Use shielded electrode
leads for minimal interference. The unshielded electrode leads work best as ground electrodes. Typically, one
biopotential input requires two shielded electrodes for signal inputs and one unshielded electrode for ground.
EL254 Ag-AgCl Unshielded Electrode, 7.2 mm diameter housing, 4 mm contact area, includes 1 m lead
terminated with a 1.5 mm female Touchproof socket for connection to the SS1L.
EL254S Ag-AgCl Shielded Electrode, 7.2 mm diameter housing, 4 mm contact area, includes 1 meter lead
terminated with two 1.5 mm female Touchproof sockets for connection to the SS1L. The gray lead
plug is for the electrode contact; the black lead pin plug is for the lead shield.
EL258 Ag-AgCl Unshielded Electrode, 12.5 mm diameter housing, 8 mm contact area, includes 1 meter lead
terminated with a 1.5 mm female Touchproof socket for connection to the SS1L.
EL258S Ag-AgCl Shielded Electrode, 12.5 mm diameter housing, 8 mm contact area, includes 1 meter lead
terminated with two 1.5 mm female Touchproof sockets for connection to the SS1L. The gray lead
plug is for the electrode contact; the black lead pin plug is for the lead shield.
EL258H Features a 2 mm gel injection hole, useful for EEG monitoring; use as both recording and reference
electrodes. 12.5 mm diameter housing, 8 mm contact area, 1 m lead terminated with 1.5 mm female
Touchproof socket for connection to the SS1L.
EL250 Series Radiotranslucent Ag-AgCI Recording Electrodes (Animals Only)
MRI Us
e: MR Conditional (tested to 9T)
Condition: For use with animals only,
due to possible heating hazards associated with incomplete
filling of gel reservoir with electrode gel.
EL254RT/258RT Components:
Electrode: Ag/AgCI Lead wire: Carbon
Enclosure: Epoxy Wire insulation: PVC
EL254RT Silver-silver chloride (Ag-AgC1) electrodes provide accurate and clear transmission of surface
biopotentials. Reusable electrodes are permanently connected to robust and pliable leadwires. The
leadwires terminate in standard Touchproof connectors for interfacing to 100C series Biopotential
modules or extension cables. 7.2 mm diameter housing, 4 mm contact area, includes 1.5 m lead
terminated with a 1.5 mm female Touchproof socket for connection to the SS1L.
EL258RT As described above for EL254RT but with larger dimensions. 12.5 mm diameter housing, 8 mm
contact area, includes 1.5 m lead terminated with 1.5 mm female Touchproof socket for connection to
the SS1L.
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