New
NHN-180 Online Ammonia Nitrogen Digital Sensor
(RS-485/ModbusRTU)
● With automatic temperature compensation.
● Output standard Rs485 (Modbus/RTU protocol) digital signal.
● The Rs485 signal is conveniently connected to third-party devices such as PLC, DCS, industrial control computers, general controllers, paperless recording instruments or touch screens.
● Parameter setting is more convenient and faster.
● The calibration function provides a simple and fast way to calibrate.
● Real-time data transmission allows you to obtain timely and accurate data for monitoring water bodies.
Range | NH4+: 0-1000mg/L or 0-100mg/L NH3: 0-150mg/L or 0-15mg/L K+: 0~1000mg/L pH: 0~14pH temperature: 0~35℃ |
Resolution | NH4-N:0.1mg/L |
Accuracy | NH4+: ±5%F.S. NH3 or total ammonia nitrogen: ±5%F.S. K+: ±5%F.S. pH: 0.1pH temperature: 0.5℃ |
Operating Temperature | 0-35°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 (Pt1000) pH compensation range: 4-10 pH K+ compensation range: 0-1000mg/L |
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