The online nitrite ion sensor is an intelligent sensing device designed specifically for water quality monitoring scenarios. It uses PVC membrane ion selective electrode method to quickly and accurately measure the concentration of nitrite in water. The device is equipped with an automatic temperature compensation function, which effectively reduces the impact of environmental temperature changes on measurement results and ensures stable and reliable data. The whole machine adopts 316L stainless steel shell with a protection level of IP68. It can be immersed in pipelines, water tanks or natural water bodies for a long time and is suitable for complex working conditions of 0-40 ℃ and ≤ 0.2MPa. The product has undergone 72 hours of aging and calibration before leaving the factory, and is ready to use immediately, meeting the online monitoring needs of environmental protection, aquaculture, industrial circulating water, drinking water pipe networks, and other fields.
Core Features:
| Model | ZW-NO2-PR | |
| Measuring principle | ion selection method | |
| Range and resolution | 0~2.000 mg/L | 0.001mg/L |
| Accuracy | ±5%;±0.3℃ | |
| Calibration method | Two-point calibration | |
| Cleaning method | / | |
| Temperature compensation | Automatic temperature compensation (Pt1000) | |
| Output method | RS-485(ModbusRTU),4-20 mA(Optional) | |
| Storage temperature | -5~40℃ | |
| Working conditions | 0~40℃,≤0.2MPa | |
| Shell material | 316L | |
| Installation method | immersion installation,3/4NPT | |
| Power consumption | 0.2W@12V | |
| Power supply | 12~24VDC | |
| Protection level | IP68 | |




Industrial-Grade & Stable Data Transmission: RS485 delivers robust anti-interference performance for real-time, reliable hardness data transmission in harsh environments (e.g., industrial boilers, municipal water supply), ensuring accurate monitoring.
Easy Integration & Scalability:Supports multi-node networking, seamlessly integrates with mainstream PLC/RTU systems, enabling flexible deployment and reducing system integration costs and maintenance complexity.

1.Are you manufacture?
A:Yes,we are Tranmitter manufacturer and exporter in China with more than 10 years of CE,ROHS,FCC,ISO and 11 patents experience.
2.Do you offer OEM services?
A:Yes,we can provide you with OEM services and design housings and logos.
3.DO you offer free samples?
A:Sorry,we don't offer free samples.After ordering in bulk,we will deduct the sample fee from the second order.
Strong R & D: 30+ Senior experts and highly educated personnel formed a R & D team, heavy investment, master a number of core technologies and patents.
Professional and effective solutions: for smart environmental protection, agriculture and other fields, to provide customized compound networking solutions.
Full range of products: covering the whole industry chain products from data collection to platform services to meet diverse needs.
Excellent quality: we have perfect quality control system, strictly quality control each production link, low defective rate.
Good service: 7×24 hours fast response, Professional pre-sale, sale, after-sales team support.