This online ammonia nitrogen monitor is an integrated industrial water quality control instrument, matched with ion selective ammonia nitrogen sensor for real-time continuous detection of ammonium content in water. Support measuring range 0.1~3000mg/L, covering low-concentration surface water and high-concentration breeding, chemical wastewater.

Built-in temperature compensation algorithm, LCD clear data display, equipped with upper and lower limit alarm function and relay output to automatically control dosing pumps, aeration systems. Dual signal output: isolated 4-20mA analog + RS485 Modbus-RTU digital communication, seamlessly connected to PLC, DCS and cloud IoT platform. IP65 dustproof and waterproof front panel, support wall-mounted and 96×96 panel embedded installation, strong anti-interference for harsh sewage sites.

MTW-PINH3-900 Online ammonia nitrogen monitor is an industrial wall-mounted analytical instrument matched with ammonia nitrogen ion sensor for continuous real-time monitoring of NH3-N in water. It supports dual signal output of 4-20mA analog and RS485 MODBUS-RTU digital communication, convenient to connect with PLC, DCS and remote monitoring cloud platform.

Built-in temperature compensation and pH correction algorithm to eliminate the interference of water temperature and pH value on ammonia nitrogen measurement, ensuring stable and accurate test data. Equipped with large LCD touch display, one-key automatic calibration, upper/lower limit relay alarm and automatic control functions.

The instrument front panel reaches IP65 protection grade, dust-proof and splash-proof, suitable for installation in harsh on-site workshops of sewage plants. It can work stably for 24 hours without interruption, with low daily maintenance cost.

It is widely used in municipal wastewater treatment plants, livestock breeding wastewater, river and lake surface water monitoring, chemical wastewater and environmental water quality automatic monitoring stations.

Key Advantages

Match wide-range ammonia nitrogen sensor, applicable to multiple water quality conditions
Independent relay control, realize automatic wastewater treatment linkage
Dual signal transmission mode, convenient for industrial automation access
Intelligent temperature compensation, stable test data
Industrial anti-interference circuit, stable operation in complex sewage environment
Simple calibration menu, easy operation for on-site workers

Sensor Technical Specifications

Measurement Range	NH4N：0.1~ 3000 mg/L K+：0.5~5000 mg/L (optional) PH：5-10 Temperature：0-40℃
Resolution	NH4N：0.01 mg/L K+：0.01 mg/L(optional) Temperature：0.1℃ pH：0.01
Accuracy	NH4N： NH4-N: ±5% of reading or ±0.2 mg/L, whichever is greater K+: ±10% of reading or ±0.2 mg/L (optional) Temperature：±0.5℃ pH：±0.1 pH
Repeatability	±5% or 0.2 mg/L, whichever is greater
Communication Protocol	MODBUS RS485
Storage Temperature	0 to 50°C (non-freezing)
Operating Temperature	0 to 40°C (non-freezing)
Dimensions	55mm×342mm(diameter × length)
Weight	<1KG
Protection Rating	IP68/NEMA6P
Cable Length	Standard 10 m cable, extendable up to 100 m

Controller Technical Specifications:

Display Output	128×64 graphic dot-matrix LCD with LED backlight for sunlight-readable operation
Power Supply	AC: 85–500 VAC; DC: 9–36 VDC
Main Material	PA66+GF25+FR(Top cover);Aluminum Alloy Powder Coating (Bottom Shell)
Output	Three channels of 4-20mA
Relay	Three relays, programmable for response parameters and values
Digital Communication	MODBUS RS485 for real-time data transmission
Storage Temperature	-20 or 70℃
Operating Temperature	-15 or 60℃
Waterproof Ratin	IP66/NEMA4X
Dimensions	145mm125mm162mm (L × W × H)
Weight	1.35KG

Application

Municipal sewage plant, livestock breeding wastewater, printing and dyeing factory, landfill leachate, chemical factory wastewater, river environmental monitoring, farmland irrigation water, aquaculture water tank monitoring.