Dual Channel Differential Electrometer
The FD223a electrometer was designed specifically for use with intracellular ion selective electrodes fabricated using glass micropipettes and liquid ion exchangers.
The active head stages allow the researcher to locate the probes directly at the measurement site to minimize noise that would normally be picked up by longer cable runs. Driven guard shields cover the micropipette holders to further reduce the potential for interference from external sources of electromagnetic noise.
The FD223a is equipped with a test resistance port which is used to measure and adjust each probe for minimum leakage current. Each channel has a standby mode which clamps the head stage input voltage to zero, preventing extreme saturation or possible damage to the high impedance input amplifier.
Electrochemical measurements with ion specific electrodes
- Dual channel with very high input impedance
- Separate outputs for Channel A, B and A-B (Differential)
- Independent DC offset controls
- Test port
- Standby mode
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 using the WPI microelectrode holder supplied.
High quality, intracellular amplifier perfect for students
- Driven guard shield
- Test port
- Ground port
- Portable
- Remote headstage
For intracellular dual or differential studies, the Duo773 has separate negative capacity controls and built-in active filtering that allows the precise balancing of time constants for artifact-free differential measurement. Comes complete with two probe headstages, 1015Ω and 1011Ω probes to monitor signals from ion-specific micro-electrodes as well as KCl-filled electrodes.
2-Channel intracellular amplifier for dual and differential studies
- Two channels for differential or intracellular ISE
- Integrated DC current generator with external control input
- Integrated low pass filter
- Bridge balance circuit to null out electrode voltage drop
- Tickle circuit
- Integrated test ports for each channel
- Dual capacitance compensations and output offset controls
- Comes complete with 2 probe headstages, normally one high impedance and one low impedance
