SenSmart 4000 Series - Fixed Gas Detector - SENSOR TECHNOLOGY
by RC Systems
These Fixed Gas Detectors accept all of the latest generation Electrochemical smart sensors that RC Systems offers.
RC Systems offers many sensors to choose from, and for a complete list of electrochemical gases, please visit the "Detectable-Gases" tab.
Electrochemical Gas Sensor
Electrochemical sensing devices basically consist of electrodes surrounded by an electrolyte solution enclosed behind a gas permeable, hydrophobic membrane. Gas molecules diffuse across the membrane to enter the electrode/electrolyte interface where chemical and electrochemical reactions occur to generate measurable electrical current flow. Current flow is directly related to gas concentration over the specified detection range. In the absence of target gas, negligible electrical current flows and consequently, a definite zero is achieved and maintained (no zero drift). A combination of electrodes and electrolyte chemistry largely determines the type of gas detected and provides inherent chemical selectivity.