Application of COD telemetry in environmental monitoring in a certain area of Fujian Province

With the deepening of environmental monitoring applications, this self powered monitoring equipment is gradually becoming popular. This device is equipped with a 14 * 1900mA/h, 3.6vdc battery, and comes with NB IoT or 4G wireless output. The stainless steel sturdy and corrosion-resistant shell meets the on-site operational requirements. The product probe is an organic matter sensor that operates using spectroscopy. Based on the absorption of ultraviolet light by organic matter, it uses the 254nm spectral absorption coefficient SAC254 (absorbance) to reflect the important measurement parameters of soluble organic matter content in water, and can be converted into COD/BOD and turbidity values under certain conditions. This method can achieve continuous monitoring without the need for any reagents.

measuring range	COD (calibrated using KHP): 0~500mg/l COD, turbidity: 10~800NTU
measurement accuracy	COD: ± 5% (KHP standard solution), turbidity: ± 10%
repeatability	5% (KHP standard solution)
resolution	COD：0.01 mg/l， Turbidity: 0.01NTU
Pressure Range	≤100KPa
Sensor material	SUS316L (regular version), titanium alloy (seawater version); Cable: PUR
Applicable water temperature	0~70℃
Sensor Size	Diameter 34mm * Length 209mm
Sensor weight	0.8KG
protection grade	IP68

Sensor cable length	10 meters
power supply	Built in lithium-ion battery, non rechargeable, 19000 × 14mAh/3.6VDC, self loss not exceeding 5%/year
endurance	Test and transmit every 5 minutes, with a single sensor working for 10 seconds, NB-IOT working for 14 months, 4G working for 12 months
Wireless breakpoint continuation	When the base station signal is interrupted, the data will be automatically saved, and after the wireless signal is restored, data with a timestamp will be transmitted again
refer to	PC IE, mobile apps (Android, HarmonyOS, Apple), WeChat mini programs

▶ Measurement parameters: COD, BOD (calculated based on 0.75COD), turbidity;

▶ The sensor adopts direct immersion installation, without sampling and preprocessing;

▶ Sensors can also be towed by floating plates;

▶ No need for chemical reagents, no secondary pollution;

▶ Comes with a built-in cleaning scraper;

▶ Short response time, capable of continuous measurement;

▶ Using LED light source with small size;

▶ The host adopts an expansion screw kit to achieve quick installation at the wellhead;

▶The host adopts a stainless steel shell, which has excellent anti-corrosion, waterproof, and impact resistance performance;

▶ Steel seal, not afraid of the influence of temperature changes on the seal;

▶ Supports multiple lid openings without affecting waterproofing, making it easy to replace batteries on site;

▶ Low self loss batteries enable devices to achieve longer battery life performance;

At present, the equipment has been stably transferred and put into operation in Zhangzhou, Fujian, and abnormal emission points have been effectively and promptly detected.