EE820采用的是E+E单光源双光速红外线测量技术，可自动进行光源老化补充，并具有较高的抗污染能力，从而保证了产品卓越的长期稳定性。为了应对提高响应时间的要求，EE820过滤器的背面安装了一个风扇，用于加速被测空气的循环和流动。
配备的IP54防护等级的外壳和特殊的过滤器，使EE820可以应用在污染工况中，例如农业和畜牧业。在进行清洁操作前，使用M12接头可以方便拆除变送器。
典型应用
益加义专利技术--CO2自动校准程序采用了双光源双光束方法，通过测量固定波长的红外线光强，将其转换为CO2的吸收量。
两个红外线光源有着不同的工作周期：其中一个红外光源作为测量光源，每隔30秒测量一次CO2浓度，并发送测量信号。另一个红外光源作为对比光源，仅在自动校准时工作，每24小时被激活2次。对比光源的工作时间很短，老化漂移量可以忽略，因此可用来定期精确校准测量光源。
益加义公司拥有多年薄膜技术的研发经验和现代化的洁净室车间。红外测量单元的测量腔体镀金工艺和组装工艺均在高等级的洁净室完成，这对仪表长期稳定的测量十分重要。
0...2000 / 5000 / 10000ppm CO2
Measuring range0...2000ppm: ± (50ppm + 2% of measuring value)
Accuracy0...5000ppm: ± (50ppm + 3% of measuring value)
0...10000ppm: ± (100ppm + 5% of measuring value)
0...5V / 10V or 4...20mA
Outputs24V AC/DC
SupplyThe EE820 is designed for use in harsh, demanding applications. A multip-point CO2 and temperature factory adjustment procedure leads to an excellent CO2 measurement accuracy over the entire temperature working range.
The EE820 incorporates the E+E dual wavelength NDIR CO2 sensor, which compensates for ageing effects, is highly insensitive to pollution and offers outstanding long term stability.For fast response time requirements there is an EE820 version with forced air circulation created by a fan installed behind the filter.With its robust, functional housing and a special integrated filter the EE820 can be installed in polluted applications such as agriculture and livestock barns. The M12 connector option facilitates easy removal of the EE820 before site cleaning operations.
An optional kit facilitates easy configuration and adjustment of the EE820.
Key Features
E+E dual wavelength NDIR CO2 working principle
Measuring range up to 10,000ppm
Auto-calibration for excellent long term stability
Very low Temperature dependency
Fast response time version
Robust and functional enclosure
Highly insensitive to pollution
Voltage or current analogue outputs
Fast and easy installation
Easy user configuration and adjustment
Typical Applicatons
Greenhouses
Fruit and vegetable storage
Stables
Hatcheries and Incubators
Vehicles, Trains, Trams
