这是一个由四部分组成的系列报告中的第四篇论文，该系列报告了用于建筑HVAC应用的典型壁挂式二氧化碳传感器的测试和评估。对15个NDIR HVAC级壁挂式二氧化碳传感器模型进行了测试和评估，以确定老化对传感器性能的影响。总共评估了45个传感器:15个模型中各有三个。在测试的15个模型中，8个模型具有单灯单波长配置，4个模型具有双灯单波长配置，3个模型具有单灯双波长配置。所有单灯单波长传感器和一个单灯双波长传感器在传感器的电子封装中包含一个“自动基线调整”算法。 每个传感器都在“收到时”的条件下进行测试，然后在一年的时间里，每隔四个月进行一次性能测试。所有试验均在40%相对湿度、73oF（22.8℃）温度、14.70 psia（101.35 kPa）压力和1100 ppm二氧化碳浓度下进行。对于每个传感器，比较四次测试的读数，以评估连续操作对传感器性能的影响。测试结果表明，不同制造商的传感器性能差异很大。在一年内，观察到传感器读数的最大偏差为420 ppm（38%），而传感器读数的最小偏差为0 ppm。引文:ASHRAE交易，2010年，第116卷，pt。新墨西哥州阿尔伯克基2号

This is the fourth paper in a four-part series reporting on the test and evaluation of typical wall-mounted carbon-dioxide sensors used in building HVAC applications. Fifteen models of NDIR HVAC-grade wall-mounted CO2sensors were tested and evaluated to determine the effect of ageing on the sensors’ performance. In all, 45 sensors were evaluated: three from each of the 15 models. Among the 15 models tested, eight models have a single-lamp, single-wavelength configuration, four models have a dual-lamp, single-wavelength configuration, and three models have a single-lamp, dual-wavelength configuration. All single-lamp, single-wavelength sensors and one single-lamp, dual-wavelength sensor incorporate an “automatic baseline adjustment” algorithm in the sensor’s electronics package.Each sensor was tested under “as received” conditions, and then, over the course of one year, performance tests were conducted at four-month intervals. All tests were conducted at 40% relative humidity, 73oF (22.8oC) temperature, 14.70 psia (101.35 kPa) pressure, and 1100 ppm CO2concentration. For each sensor, the readings from the four tests were compared in order to evaluate the effect of continuous operation on the sensor’s performance. The test results showed a wide variation in sensor performance among the various manufacturers. In one year, the maximum deviation in a sensor’s reading was observed to be 420 ppm (38%) while the minimum deviation in a sensor’s reading was observed to be 0 ppm.