1.3MAX-250E Oxygen Sensor
MAX-250E oxygen sensors offer quick response, stability and extra life on the order of 900,000 percent hours.
The MAX-250E is a galvanic, partial pressure sensor that is specific to oxygen. It consists of two electrodes (a cathode and an anode), a teflon membrane and an electrolyte. Oxygen diffuses through the teflon membrane and immediately reacts electrochemically at a gold cathode. Concurrently, oxidation occurs electrochemically at a lead anode, generating an electrical current and providing a voltage output. Electrodes are immersed in a unique gelled weak acid electrolyte which is responsible for the sensors long life and motion insensitive characteristic. Since the sensor is specific to oxygen, the current generated is proportional to the amount of oxygen present in the sample gas. When no oxygen is present, there is no electrochemical reaction and therefore, negligible current is produced. In this sense, the sensor is self-zeroing.
CAUTION: The Maxtec MAX-250E oxygen sensor is a sealed
!device containing a mild acid electrolyte, lead (Pb), and lead acetate. Lead and lead acetate are hazardous waste constituents and should be disposed of properly, or returned to Maxtec for proper disposal or recovery.
CAUTION: Do not use ethylene oxide for sterilization. Do not immerse the sensor in any cleaning solution, autoclave
!or expose the sensor to high temperatures.
CAUTION: Dropping or severely jarring the sensor after
!calibration may shift the calibration point enough to require recalibration.
CAUTION: The flow diverter for the sensor is for use with
!flowing gases only. Do not use the diverter when performing static sampling, such as in incubators, oxygen tents, oxygen hoods, etc.
