Sensor Specifications
The 7-Series electrochemical sensor by Ningxia MaiYa Sensor Technology Development Co., LTD features a repeatability of 1% output signal and a linearity with a regression coefficient of R2=0.999. It operates within a temperature range of -20℃ to +50℃ and a humidity range of 15% to 90% RH, non-condensing. The sensor can withstand atmospheric pressure ±10% with a pressure factor of less than 0.02% signal per MBar. It has a baseline extent of less than ±0.4µA and a long-term drift of less than 5% signal loss per year. The sensor does not require a bias voltage and has a load resistance of 10Ω. It does not include built-in filters, has a lifetime of 2 years in air, and comes with a 1-year warranty from the date of shipment. The output current polarity is positive for carbon monoxide and hydrogen sulfide sensors.

Product Models and Performance
The document lists various models of the 7-Series sensor, each with different normal and maximum ranges, sensitivity, resolution, response time, and maximum zero drift. For example, the 7CO-10 model has a normal range of 0-10 ppm, a maximum range of 20 ppm, a sensitivity of 1.4±0.3 µA/ppm, a resolution of 0.01 ppm, a response time of less than 25 seconds, and a maximum zero drift of 0.05 ppm.

Cross Interference
The sensor's response to cross-interference from other gases is noted, with specific gases like H2S, SO2, C2H5OH, NH3, and CH4 showing no response, while H2 at 200 ppm shows a response of 45 ppm. It is emphasized that cross-interference data is for reference only and the measurement of intersecting gases is not linear.

Important Declarations
The document includes several important declarations: 4-Series sensors are designed for gas leak monitoring and are not suitable for long-term exposure or continuous detection. Sensor pins must be connected through a PCB socket to avoid damage. Sensors should avoid contact with organic solvents and high concentrations of gas. Electrochemical sensors with positive output current require oxygen for the reaction and should be calibrated with air as the background gas. Sensors should not be removed or inserted while powered on to prevent damage.