Water Quality Ammonium Nitrogen Sensor, 0~10/100/1000mg/L

SKU: SUCH-WQS-NHN106

$555.89

● 0~10/ 0~100/ 0~1000mg/L ● 0.01/ 0.1 mg/L,0. 1°C resolution ● RS485 (Modbus RTU)/ 4-20mA ● Ion-selective electrode method

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Output Signal *
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Overview
Specs
Application
FAQ
Reviews

Overview

SUCH professional ammonia nitrogen sensors utilize ion-selective electrode technology combined with automatic temperature compensation to achieve high-precision detection across different concentration ranges in water quality. Supported ranges include 0~10 mg/L, 0~100 mg/L, and 0~1000 mg/L. The water sensor features RS485 (Modbus-RTU) and 4–20 mA output for flexible system integration. Its 3/4 NPT mounting interface and 5-meter waterproof cable further simplify field deployment.

Feature

Ammonium nitrogen sensor feature

The SUCH water quality ammonia nitrogen sensor utilizes an ammonium ion (NH₄⁺) selective electrode based on a PVC membrane to measure ammonium ion concentration in water. It is available with a measurement range of 0–20 mg/L and incorporates Pt1000 temperature compensation.
Signal Output: RS485/ 4-20mA for seamless integration into PLCs, DCS systems, industrial control computers, and similar devices.
Stable Reference System: The internal reference solution, designed specifically for ammonium ion measurement, permeates extremely slowly through a microporous salt bridge under a minimum pressure of 100 kPa (1 bar).

Dimension (unit: mm)

Ammonium nitrogen sensor dimension

Correct Installation Method

Water quality sensor correct installation method

In Figure A, the electrode connector is too long and the insertion portion is too short, which can create dead space inside the ammonia nitrogen sensor and cause measurement errors. Installation should follow Figure B (inserting toward the FLOW direction).
The installation method in Figure A can cause air pockets to form in the conductivity cell, leading to measurement errors and instability. Installation should follow Figure B.

Note: Installing sensors is a highly meticulous task; improper installation methods will not yield satisfactory measurement data. When installing water quality sensors, carefully select the installation location and consider the mounting approach to prevent measurement data distortion.

Primary Interfering Ions

Interferences (moles/liter)	10⁻⁴ M Ammonium	10⁻³ M Ammonium	10⁻² M Ammonium
H⁺	< 2	< 1	< 1
Li⁺	0.2	0.5	0.5
Na⁺	0.005	0.08	0.8
K⁺	7×10⁻⁵	6×10⁻⁴	6×10⁻³
Cs⁺	0.003	0.05	0.5
Mg²⁺	> 0.5	> 1	> 1
Ca²⁺	> 0.2	> 1	> 1
Sr²⁺	> 0.2	> 1	> 1
Ba²⁺	> 0.2	> 0.5	> 0.5
Zn²⁺	0.001	0.01	0.1
N₂H₅⁺	> 0.1	> 0.1	> 0.1
Bu₄N⁺	1×10⁻⁵	1×10⁻⁴	1×10⁻³

Specs

Measurement Principle	Ion-selective electrode method
Measurement Range	0~10 mg/L
	0~100 mg/L
	0~1000 mg/L
Accuracy	0~10 mg/L: ±10% or ±1 mg/L, ±0.5°C
	0~100 mg/L: ±10% or ±5 mg/L, ±0.5°C
	0~1000 mg/L: ±10% of reading ±0.5°C
Resolution	0~10 mg/L: 0.01 mg/L,0. 1℃
	0~100 mg/L: 0.01 mg/L,0. 1℃
	0~1000 mg/L: 0.1 mg/L,0. 1℃
Response Time	T90<60 s
Minimum Detection Limit	0.09 (0–10 mg/L and 0–100 mg/L)
Minimum Detection Limit	0.9 (0–1000 mg/L)
Calibration Method	Two-point calibration
Cleaning Method	/
Temperature Compensation	Automatic temperature compensation (Pt1000)
Output Method	RS485 (Modbus-RTU), 4-20 mA (optional)
Storage Temperature	-5 to 65°C
Operating Conditions	0~40°C, <0.1 MPa, 4–10 pH
Mounting Method	Submersible installation, 3/4 NPT
Power Consumption	0.2W @ 12V
Power Supply	12–24VDC
Protection Rating	IP68
Cable Length	5 m, other lengths customizable
Housing Material	ABS, PVC, POM

PDF computing 0~10/100/1000mg/L Water Quality Ammonium Nitrogen Sensor User Manual

Application

Wastewater Treatment Plant

Agricultural Drainage

Aquaculture

FAQ

Q1: How does a water quality ammonia nitrogen sensor work? ❯

Water quality ammonia nitrogen sensors typically operate based on ion-selective electrode or colorimetric methods, calculating ammonia nitrogen content by detecting ammonium ion concentrations in water. Electrode-type sensors utilize a selective membrane that responds to changes in ammonium ion activity, thereby outputting a stable electrical signal. Some models also incorporate built-in temperature compensation modules (e.g., Pt1000) to minimize the impact of temperature variations on measurements.

Q2: How should water quality ammonia nitrogen sensors be maintained? ❯

Maintenance for ammonia nitrogen sensors is relatively straightforward, though basic upkeep is still required for long-term use. Regular cleaning of the electrode surface is necessary to prevent interference from deposits like sludge, grease, or algae. If installed in water bodies with high suspended solids or prone to biofilm buildup, pairing with an automatic brushing device or manual periodic wiping is recommended to reduce clogging risks. Additionally, inspect cable connections, waterproof seals, and electrode membranes for integrity to ensure long-term stable operation.

Q3: Can water quality ammonia nitrogen sensors be used in different water conditions? ❯

Ammonia nitrogen sensors are suitable for diverse water environments, including wastewater treatment plants, aquaculture ponds, surface water, industrial discharge monitoring, water treatment facilities, and circulating cooling water systems. Their core advantages include long-term online monitoring capability, stable data output, and rapid response times. Most electrode-type ammonia nitrogen sensors feature anti-interference capabilities and IP68 protection ratings, enabling submersible installation.

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Water Quality Ammonium Nitrogen Sensor, 0~10/100/1000mg/L

Feature

Dimension (unit: mm)

Correct Installation Method

Primary Interfering Ions

Wastewater Treatment Plant

Agricultural Drainage

Aquaculture

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