New
NHN-120 Online Ammonia Nitrogen Digital Sensor
(RS-485/ModbusRTU)
●With automatic temperature compensation.
●Output standard Rs485 (Modbus/RTU protocol) digital signal.
●Rs485 signal is convenient for connecting to third-party equipment such as PLC, DCS, industrial control computer, general controller, paperless recording instrument or touch screen.
●Parameter setting is more convenient and faster.
●The calibration function provides a simple and fast calibration method.
●Real-time data transmission allows you to obtain timely and accurately monitored water body data.
Range | NH4-N(0~100)mg/l |
Resolution | NH4-N:0.1mg/L |
Accuracy | ±10% of the measured value or ±2mg/L, whichever is greater |
Operating Temperature | 0-40°C |
Working Pressure | <0.1MPa |
Power supply | 12~24VDC±10% |
Signal output mode | Rs485(Modbus/RTU) |
Wetted material | PVC and POM |
Mounting Type | 3/4" NPT thread, submersible installation |
Maintenance | It is recommended to clean the electrode once a month and calibrate it every three months. |
Display type | No display |
Measurement compensation method | Automatic temperature compensation (Pt100) |
Dimensions | 300×60mm |
Weight | 9600g |
Calibration method | Two-point calibration |
Protection Rating | IP68 |
Measuring principle | Ammonium ion selective electrode method |
Power Consumption | <0.5W |
Brand | DOWESTON |

Tell us about your measurement task and we will help with product selection and technical questions.info@doweston.com