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Electro 705 Electrometer
  • Low noise, high quality intracellular amplifier well-suited for the student lab
  • Remote headstage easily mounts in any manipulator
  • Battery-powered
 
 
 

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.

Electrode Resistance Test

The SYS-705 provides a 1 nA electrode test current. Electrode resistance is monitored at the 1X output as a voltage (1 mV/M). A 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 SYS-705s can be connected in tandem to create an optional differential amplifier probe system. 

Specifications 

Input Impedance 10^12 Ohms, shunted by 1pF
Output Impedance 100 Ohms, both outputs
Gain X1: ±0.1%
Input Voltage Range ±5 V
Risetime 15us, 10-90%
Noise Level 500uV peak-to-peak*
Input Capacitance Compensation 0-50pF
Gate Leakage Curent ±10pA, adjustable to zero
Electrode Resistance Test 1mV/ M Ohms
DC Positioning ± 300mV
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)

 
 
 
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