0~100mg/L Online Digital Ammonia Nitrogen Nh4-N Sensor for Water

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: NH351 ammonia nitrogen sensor
• Product Name: Nh4-N Sensor
• Cable Length: 10 Meters
• Principle: ISE
• Protection Grade: IP68
• Material: POM
• Measuring Range: 0~100mg/L
• Automatic Cleaning: with Brush
• Accuracy: 5%
• Communication: RS485
• Pressure Range: 1 Bar
• Transport Package: Packing
• Specification: Diameter: 65mm Length: 275mm
• Trademark: Daruifuno
• Origin: China
• HS Code: 9026809000
• Production Capacity: 5000pieces/Year

Product Description

Features

Adopt ion selective electrode (ISE) method

Digital sensor, RS-485 output, support MODBUS

No reagents, no pollution, environmentally friendly

With self-cleaning brush, longer maintenance cycle

Automatically compensat pH and temperature

Note: The ion electrode is only suitable for fresh water application scenarios, not for sea water
 

Specification

Model	NH351
Measuring Principle	Ion selective electrode (ISE) method
Measuring Range	NH4-N: 0~1000mg/L
Accuracy	NH4-N: 5% of the measured value ± 0.2mg/L pH: 0.1pH
Resolution	NH4-N: 0.01mg/L
Communication	RS-485, MODBU-RTU
Related Measurement	pH: 5.0~9.0pH (recommendation)
Temperature Range	0~45ºC (does not freeze)
Storage Temperature	0~50ºC (does not freeze)
Working Pressure	1 bar
Protection Grade	IP68
Shell Material	POM
Installation	Investment, 1 inch NPT pipe thread
Dimension	Diameter: 65mm Length: 275mm

Principle:
The sensor utilizes an ammonium ion-selective electrode (NH4+-ISE) to measure ammonia nitrogen (NH4+/NH3) in aqueous solutions. The ISE consists of a polymer membrane doped with a selective ionophore (e.g., nonactin or monactin), which generates a membrane potential proportional to the logarithmic concentration of ammonium ions (NH4+) via the Nernst equation.
Application: