BOD Sensor Henan Suijing Environmental Protection Technology Co., Ltd. was established in 2018. The company is located in Luoyang, an important industrial city in central China, and is a manufacturing and production enterprise that provides water quality analysis instruments for various industries and enterprises in Luoyang. Over the past few years, the company has adhered to the enterprise spirit of seeking truth from facts and exploring innovation, continuously advancing and rapidly growing in the water quality testing industry. The company's products are widely used in many fields such as water plants, petroleum, chemical, and food machinery manufacturing. Over the years, with professional products and a positive and enthusiastic work attitude, Suijing's footprint has spread to 30 provinces, municipalities and autonomous regions in China, and its scientific research innovation and service capabilities have rapidly improved

GNST-BOD221
BOD sensor
Product Introduction
GNST-BOD221 is a dual beam probe type BOD intelligent sensor that effectively reduces turbidity interference through compensation. It comes with a cleaning brush to avoid the influence of attachments and bubbles on measurement. The sensor adopts RS485 interface and standard Modbus protocol, and the measurement data can be converted into COD, BOD, TOC, etc., quickly reflecting changes in the water body.
Application field
The instrument is widely used in industries such as environmental surface water, municipal sewage, and industrial wastewater, and has been unanimously recognized by a large number of users.
BOD sensor
Measurement principle
The UV absorption spectrum of water has a good correlation with organic pollutants in the water, and the absorption of specific wavelengths of ultraviolet light by the concentration of organic pollutants follows the Lambert Beer law.
Product Features
(1)Differential optical detection with temperature compensation, high signal accuracy, and good stability
(2)Equipped with self-cleaning function to remove attachments and bubbles from the measurement window, maintenance free
(3)Dual UV path detection, not affected by chromaticity, automatically deducts turbidity interference in organic matter measurement
(4) Corrosion resistant casing, waterproof ratingIP68, RS485 communication interface, standard ModBus protocol, easy to integrate
Technical Specifications
model |
GNST-BOD221 |
working principle |
Dual wavelength UV absorption method |
Measure wavelength |
254nm,365nm |
measurement range |
BOD:0250 mg/L
Turbidity:0~600NTU
|
Turbidity compensation range |
200NTU |
repetitiveness |
≤1% |
measurement accuracy |
≤5% |
zero drift(24h) |
±1%F.S. |
Span Drift(24h) |
±2%F.S. |
detection limit |
1mg/L |
resolution |
0. 1mg/L |
Protection level |
IP68 |
communication interface |
RS485, standardModbusProtocol baud rate9600 Factory default address bits50 |
Dimensions |
φ33*221mm, cable10rice(customizable) |
material |
316Lstainless steel/PVC/Titanium alloy optional |
weight |
1kg |
install thread |
upper endNPT3/4thread |
Working Voltage |
(9~36)V DC |
MTBF |
≥1440h/time |
power consumption |
0.9W(Motor brush rotation)0.4W(The motor brush is not working) |
Cleaning Method |
Mechanical brush |
calibration cycle |
1~3month |
working environment |
(0~50)'C |