以下是QRO-401汽车尾气分析仪的产品中英文介绍：

QRO-401汽车尾气分析仪是一款专为汽车尾气检测而设计的高精度仪器，适用于汽车制造、汽车维修、发动机分析研究、机动车年度检审以及环境保护监测等多个领域。它能够测量多种尾气成分，包括一氧化碳（CO）、碳氢化合物（HC）、二氧化碳（CO₂）、氧气（O₂）、空气剩余率（λ）、空燃比（AFR），还可选配测量氮氧化物（NOₓ）。

该仪器采用先进的测量技术，CO、HC、CO₂采用非分散红外吸收法（NDIR），O₂、NOₓ采用电化学传感器。其测试量程广泛，CO为0.00-9.99%，HC为0-9999ppm，CO₂为0.0-20.0%，O₂为0.00-25.00%，λ为0-2.000，AFR为0.0-99.0。测量精度高，可重复性小于2%FS，响应时间在10秒以内，能够快速准确地提供检测结果。

QRO-401具有自动调整预热时间功能，预热时间约2-8分钟。系统在未使用时会进入stand-by节电模式，有效节省能源。此外，它还配备了六段LED指示灯，操作简单直观。内置超小型打印机，可随时打印检测数据、日期和时间，方便记录和存档。通过RS232接口，该仪器还可以连接电脑，配合专用软件进行数据传输和进一步分析。

在设计上，QRO-401注重便携性，尺寸为285mm×410mm×155mm，重量仅约4.5kg，便于携带和现场使用。它还具备多种实用功能，如空气漏气检查、保持功能（Hold），可临时暂停测量，方便用户进行不同场景下的检测。用户可以根据汽车燃料类型进行选择，包括汽油、液化石油气（LPG）、压缩天然气（CNG）和酒精。此外，QRO-401还配有探头、探头软管、备用保险管、泄漏测试帽、备用过滤器、使用手册、电源线、接地线、校准控制器头、校准连接软管等基本附件，并可选配打印机、打印纸、PC软件和连电脑电缆。

The QRO-401 automotive exhaust gas analyzer is a high-precision instrument specifically designed for automotive exhaust gas detection. It is suitable for a variety of fields, including automotive manufacturing, automotive repair, engine analysis and research, annual inspection and review of motor vehicles, and environmental protection monitoring. The analyzer is capable of measuring various exhaust gas components, such as carbon monoxide (CO), hydrocarbons (HC), carbon dioxide (CO₂), oxygen (O₂), air residual rate (λ), air-fuel ratio (AFR), and it can also be optionally equipped to measure nitrogen oxides (NOₓ).

Utilizing advanced measurement techniques, it employs non-dispersive infrared absorption (NDIR) for CO, HC, and CO₂, and electrochemical sensors for O₂ and NOₓ. The analyzer has a wide range of measurement scales: CO from 0.00 to 9.99%, HC from 0 to 9999ppm, CO₂ from 0.0 to 20.0%, O₂ from 0.00 to 25.00%, λ from 0 to 2.000, and AFR from 0.0 to 99.0. With high measurement accuracy and repeatability of less than 2% FS, it can provide quick and accurate results within a response time of 10 seconds.

The QRO-401 features an automatic preheat time adjustment function, with a preheat time of approximately 2 to 8 minutes. When not in use, the system enters a stand-by power-saving mode to effectively conserve energy. Additionally, it is equipped with a six-segment LED indicator for intuitive operation. The built-in mini printer allows for on-site printing of detection data, date, and time, facilitating convenient recording and archiving. The analyzer can also be connected to a computer via an RS232 interface, and with dedicated software, data transfer and further analysis can be performed.

In terms of design, the QRO-401 prioritizes portability, with dimensions of 285mm×410mm×155mm and a weight of only about 4.5kg, making it easy to carry and use on-site. It also features various practical functions, such as air leak detection and a hold function that allows temporary suspension of measurement, making it convenient for users to conduct detections in different scenarios. Users can select the type of automotive fuel, including gasoline, liquefied petroleum gas (LPG), compressed natural gas (CNG), and ethanol. Moreover, the QRO-401 comes with a range of basic accessories, including a probe, probe hose, spare fuse, leak test cap, spare filter, user manual, power cord, ground wire, calibration controller head, and calibration connection hose, and optional items such as a printer, print paper, PC software, and a computer connection cable are also available.