Intracellular Low Cost Electrometer

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Intracellular Low Cost Electrometer

IE-251A-V

Intracellular Low Cost Electrometer

PRICE ON REQUEST

Product code: IE-251A-V

A low cost version of the research-grade Intracellular Electrometer.

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Overview

A low cost version of the research-grade Intracellular Electrometer. The important features required for low noise, drift free recording from glass microelectrodes have been retained in this lower cost model. The Intracellular Low Cost Electrometer is easy to use and is an excellent choice for student teaching laboratories. It  includes a very small active headstage, essentially the same as used with the Intracellular Electrometer. Epoxy-sealed construction affords maximum resistance to saline corrosion. Its small size and low mass permit easy mounting in a micropositioner. The supplied probe connects directly to the probe input on the Electrometer.

Included with the Intracellular Low Cost Electrometer:

Accessories purchased separately:

Details

Features


  • Fixed gains of x1 and x10.
  • Capacitance Compensation neutralizes input capacitance for up to 50 pF.
  • Junction potentials of up to ±200 mV are nulled with the DC Position control.
  • Electrode Test provides convenient electrode resistance check.
  • Push button operated Buzz produces oscillations at pipette tip to facilitate cell impalement.
  • Convenient Probe Test port permits fast check of amplifier performance.


Current Injection:
Bridge balance circuitry of the IE-251A-V allows simultaneous stimulation and recording through microelectrode resistances up to 1000 MΩ in two ranges. Voltages at the Stimulus Input are converted to constant currents applied to the electrode. The steady state and transient components of the current injection artifact are nulled with the DC and transient balance controls. The corrected signal is viewed at the single-ended bridge output. Electrode resistance is read from the DC balance ten-turn dial.

Overdrive Indicators:
Two visual indicators call attention to overload conditions:

  • Input Overdrive is illuminated whenever the probe input voltage exceeds ±1 V, caused by either excessive current through the microelectrode or an open circuit (open or blocked electrode).
  • Current Overdrive warns of excessive voltage (>50 V) applied to the Stimulus Input.

 

Product Code


IE-251A-V
Intracellular Low Cost Electrometer

Technical


Ordering Information

When ordering, please specify the following: Mains Power (V) = 115 for 110-115 V or 220 for 220-240 V


Specifications

  • Input Impedance: 1011 Ω shunted by 0.5 pF
  • Output Resistance: 100 Ω
  • Gains: x1, x10
  • Risetime (10-90%): 10 µsec, measured through 20 MΩ resistor
  • Noise Level: 25 µV p-p input shorted (0.1 Hz to 10 kHz) at x1 output & 250 µV p-p, 20 MΩ at input
  • Capacitance Compensation: 0-50 pF
  • Probe Input Voltage Range: ±1 V
  • DC Positioning Range: ± 200 mV, referred to input
  • Leakage Current: Adjustable to zero
  • Electrode Resistance Test: 1 mV/MO

Buzz:

  • Amplitude variable 0 to 15 V
  • Frequency variable 100 Hz to 10 kHz

Current Injection:

  • Bridge Balance Resistance Ranges: 0 - 100 MΩ & 0 - 1000 MΩ 
  • Current Injection Limit: ±1 V divided by electrode R or 0.5 µA, whichever occurs first
  • Stimulus Input Resistance: 3.3 kΩ
  • Max. Stimulus Input: ± 50 V
  • Bridge Bal. Output Resist.​: 100 Ω​
  • I Monitor Output Resist.: 1 kΩ
  • I Monitor Output Scale Factor: 1V = 50 nA

Additional Features:

  • Power Requirements: 100 to 130 or 220 to 240 VAC, 50/60 Hz, 20 VA
  • Physical Dimensions - Probe Handle: 6.5 x 65 mm (D x L)
  • Physical Dimensions - Probe: 9.5 x 65 mm (D x L) with 1.8 m cable
  • Physical Dimensions - Case: 12.5 x 20.3 x 25.4 cm (H x W x D)
  • Shipping Weight: 4.5 kg
  • Warranty: Two years, parts and labor