VA-10M – Voltammetry/Amperometry (Module)

Npi's VA-10M is a highly sensitive current amplifier (picoampere range) intended for voltammetric and amperometric measurements utilizing carbon-fiber microelectrodes.

Overview
Specifications
Links

Advantages of the VA-10M

User-friendly amplifier designed for voltammetric recordings
Capable of detecting the smallest signals with sensitivity in the picoampere range
Compatible with carbon fiber electrodes
Facilitates in vivo recordings with optional mini-headstages (including multi-channel options)
Also offered as a 19" stand-alone device

Voltammeter-Amperometer Module

Npi's VA-10M is a highly sensitive current amplifier (picoampere range) intended for voltammetric and amperometric measurements utilizing carbon-fiber microelectrodes.

Features:

Low noise operation, functioning within the picoampere range
Optimally designed for recordings from individual cells
Can be utilized with external waveforms for cyclic voltammetry
Telegraph outputs provided for straightforward interfacing with data acquisition systems
3-electrode headstage available for a floating command potential
Gain settings adjustable from 0.5 to 25 mV / pA in six increments
Accurate built-in voltage source for DC amperometry (+/- 1000 mV standard, +/- 2000 mV optional)

Applications:

Enables concurrent electrophysiological recordings during voltammetric or amperometric studies using headstages with differential inputs
Applicable in scanning electrochemical microscopy
Also appropriate for lipid bilayer recordings

Compatible with 5 µm carbon fiber electrodes, which are also available from npi.

Specifications of the VA-10M:

HEADSTAGE:

Input voltage range: ±1200 mV
Operating voltage: ±12 V
Enclosure: Size: 40 x 70 x 20 mm, not grounded
Mounting plate: 50 x 70 mm, not conducting
Electrode connector: BNC with driven shield
Ground connector: 1 mm connector (black)
Driven shield output: 1 mm connector (red)
Input resistance: >1013 Ω
Current range: ±20 nA
Feedback resistor: 500 MΩ

NOISE: <1 pA

LP FILTER:

4-pole or 8-pole Bessel FILTER
6 corner frequencies: 100, 300 500, 1k, 3k, 5k Hz.

GAIN: 6-position rotary switch (x0.5, x1, x2.5, x5, x10, x25) mV / pA

VOLTAGE SOURCE: COMMAND VOLTAGE set by 10-turn potentiometer, range: (1000 mV, polarity selectable with polarity switch (+, 0, -), display XXXX mV

OUTPUTS:

Impedance: 250 Ω
FILTERED: BNC connector, sensitivity selectable with GAIN switch, FILTERED with LP Bessel FILTER
UNFILTERED: BNC connector, sensitivity selectable with GAIN switch

INPUTS: Resistance: 1 MΩ

COMMAND VOLTAGE: INPUT BNC connector, sensitivity: /10, also displayed

MONITORS:

Impedance: 250 Ω
GAIN: BNC connector, 1 V per step, +1 V….+7 V
COMMAND: BNC connector, sensitivity: x10

POWER REQUIREMENTS: 115/230 V AC, 60/50 Hz, fuse 0.4/0.2 A, slow.

Ordering Information

VA-10M4 Voltammeter module with 4-pole Bessel filter for recordings with carbon fiber electrodes, width = 1
VA-10M8 Voltammeter module with 8-pole Bessel filter for recordings with carbon fiber electrodes, width = 1
VA-HS3 Differential (3-Electrode) Headstage for VA-10 Amplifier System
VA-HS-MINI VA-10 MiniHeadstage with differential input, with standard cable 2.5m, D=2.3mm, w/o housing
VA-HS4 4-channel Headstage for VA-10 Modular System
VA-CFE Carbon fiber electrodes, 5 µm diameter, using the Anodic Electrophoretic Deposition of Paint (EDP) method
VA-CFE-H-BNC CFE holder for headstages with BNC connector

You can also visit site of the manufacturer.

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