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Remote Headstage — Easily mounted in any manipulator, this small probe, containing the first stage of amplification, includes a microelectrode holder, which plugs directly into the probe input.
Battery Power — Four 9V alkaline batteries (included) power the Electro 705 for approximately 500 hours giving a super clean low noise source of power making the Electro 705 the quietest amplifier available. Batteries can be easily tested by the press of a button.
Capacitance Compensation — Corrects for loss of rise time caused by the presence of electrode capacity. Up to 50 pF of electrode shunt capacity may be neutralized.
Driven Guard Shield — Stray capacitance can be further reduced by placing the driven guard shield (included) over the microelectrode holder at the input end of the probe.
Tickler Circuit — A momentary oscillation that helps achieve cell penetration.
Electrode Resistance Test — The 705 provides a 1 nA electrode test current. Electrode resistance is monitored at the 1X output as a voltage (1 mV/M).
Probe Test Port — Allows the convenience of testing the amplifier's intrinsic noise and gain without cumbersome external test hookups. Gate leakage current can also be adjusted with minimum effort.
Baseline Position Control — Adds or subtracts up to 300 mV to the headstage output, allowing artifact voltages such as liquid junction potentials to be nulled prior to recording.
Differential Output — Two Electro 705s can be connected in tandem to create an optional differential amplifier probe system.
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| ELECTRO 705 SPECIFICATIONS |
| INPUT IMPEDANCE |
1012 Ohms, shunted by 1 pF |
| OUTPUT IMPEDANCE |
100 Ohms, both outputs |
| GAIN |
X1: ±0.1% |
| INPUT VOLTAGE RANGE |
±5 V |
| RISETIME |
15 µs, 10-90% |
| NOISE LEVEL |
500 µV peak-to-peak* |
| INPUT CAPACITANCE COMPENSATION |
0-50 pF |
| GATE LEAKAGE CURRENT |
±10 pA, adjustable to zero |
| ELECTRODE RESISTANCE TEST |
1 mV/ M Ohms |
| DC POSITIONING |
± 300 mV |
| COMMON MODE REJECTION |
>104 (in differential mode) |
| POWER |
Four 9V alkaline batteries, supplied |
| DIMENSIONS |
8.5 x 3.5 x 2.2 in. (22 x 9 x 6 cm) |
| SHIPPING WEIGHT |
5 lb (2.3 kg) |
| * Wide band, with 20 M Ohms source |
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| 705 |
Electro 705 Electrometer |
Probe, driven guard shield and micropipette holder MEH1SF included for glass microelectrodes O.D. 1.0 mm, 1.2 mm, 1.5 mm, or 2.0 mm.
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Optional Accessories
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| 3468 |
Dual Rack Mount Kit |
| 3469 |
Single Rack Mount Kit |
| M3301 |
Micromanipulator (specify left- or right-handed) |
| M-3 |
80° Tilting base 6mm x 1mm screw |
| RC1T |
Reference cell (Ag/AgCl) |
| 705PF |
Replacement probe (includes calibration)* |
| 2541 |
Driven guard shield for 705PF Probe |
| MEH1Sxx |
Microelectrode holder |
- See: Cables and connectors
- See: Microelectrode holders
- See: Capillary glass
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