Electro 705, a battery operated, low noise, wide band electrometer preamplifier, is designed for intracellular voltage measurement. Two 705's can be linked together to form a high impedance differential electrometer pair. Each instrument includes a miniature gold plated active probe to which a microelectrode can be attached.
- Driven guard shield
- With Test port and ground port
- Portable and remote headstage
- Cost effective, battery powered and capacitance compensation
- It measures intracellular action potentials
Easily mounted in any manipulator, this compact probe, containing the first stage of amplification, includes a microelectrode holder, which plugs directly into the probe input.
Four 9 V alkaline batteries (included) power the Electro 705 for approximately 500 hours giving a 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.
The Electo 705 provides a 1 nA electrode test current. Electrode resistance is monitored at the 1× output as a voltage (1 mV/M). The Probe Test Port allows the convenience of testing the amplifier's intrinsic noise and gain without cumbersome external test hookups. Head stage leakage current can also be adjusted with minimum effort. The 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.
Input impedance: 1012 Ω, shunted by 1 pF
Output impedance: 100 Ω, both outputs
Gain X1: ±0.1%
Risetime: 15 µs, 10 - 90%
Noise Level: 500 μV peak-to-peak*
Gate Leakage Curent: ±10 pA, adjustable to zero
DC Positioning: ±300 mV
Common Mode Rejection: >10⁴ (in differential mode)
