The Model 1402 Static Potentiostat was designed specifically as a low-cost circuit for use with commercial electrochemical gas sensors. It can, however, be used for many other applications, with or without modification. The circuit is a standard, grounded-working electrode design. For information on the operation of a potentiostat, click here
The Model 1401 Power Supply is intended for use with up to 8 Model 1402 circuits. It provides +5V and -5V at 20 mA and operates from a wall transformer. There is also space for installing parts to make a higher-current +5V supply for other uses. (See right side of above diagram.)
Features:
* Switch-selected current ranges:
1 microamp per volt; 10 uA/V; 100 uA/V; u1000 A/V (approx. 1 nA to 3 mA)
* OEM part for manufacture or research lab use. Also available in enclosure (as Model 1420).
* Screw-adjustable gain, offset, and applied bias
* Built-in low-pass noise filter with cutoff about 1 Hz. (Can be disabled.)
* Output available in inverted and noninverted orientation.
* Modifiable for special uses, such as externally-controlled bias or higher voltages.
* Socketed op amps allow use of premium parts for lower noise or higher voltage operation.
* Also available in small, surface mount version. (Inquire)
Applications:
* Standard porous-electrode electochemical gas sensors.
* A versatile building block for sensor test systems.
* Constant-voltage source.
* Constant-current source with adjustable ranges, not ground-referenced.
* Resistance-based sensors requiring careful control of excitation current
(e.g., conductive polymer, composite polymer).
* Voltammetric potentiometer (with function generator and slight modification).
