Optional potassium-ion measurement is documented for this model
Advanced compensated configuration · PINH3-900
Online Ammonia Nitrogen Analyzer
An integrated online NH₄-N system for nitrification, aeration, industrial processes and river monitoring, with optional potassium measurement for projects that need additional ion compensation data.
NH₄-N 0.1–3000 mg/LOptional K⁺ 0.5–5000 mg/LØ55 × 342 mm
Model-specific values checked against the supplied sheet
PINH3-900 and PINH3-500 retain separate optional parameters, probe dimensions and configurations. The black FUNEL transmitter image provides consistent export-market presentation.
01
Measurement principle and product highlights
Ion-selective electrode measurement directly detects ammonium ions in water
Integrated pH and temperature measurement supports ammonia compensation
Digital sensor architecture supports long-distance transmission and system integration
Three 4–20 mA outputs, three configurable relays and Modbus RS485
Reverse-polarity protection for sensor power and RS485 A/B connections
Time display, data storage, historical review and optional wireless transmission
02
Product technical specifications
Confirm the process point, water matrix, minimum/normal/peak NH₄-N, pH, temperature, potassium interference, installation, cable and control interfaces before quotation.
- Measurement principle
- Ammonium ion-selective electrode with pH and temperature compensation
- Ammonia nitrogen range
- NH₄-N 0.1–3000 mg/L
- Optional potassium range
- K⁺ 0.5–5000 mg/L
- pH range
- pH 5–10
- Temperature range
- 0–40°C
- Resolution
- NH₄-N 0.01 mg/L; K⁺ 0.01 mg/L; pH 0.01; temperature 0.1°C
- Accuracy
- NH₄-N ±5% of reading or ±0.2 mg/L, whichever is greater; K⁺ ±10% of reading or ±0.2 mg/L; pH ±0.1; temperature ±0.5°C
- Repeatability
- ±5% or ±0.2 mg/L, whichever is greater
- Power supply
- 85–500 VAC; 9–36 VDC
- Analog output
- 3 × 4–20 mA
- Relays
- 3 configurable relays
- Digital communication
- Modbus RS485
- Storage temperature
- 0–50°C, non-freezing
- Operating temperature
- 0–40°C, non-freezing
- Sensor dimensions
- Ø55 × 342 mm
- Transmitter dimensions
- 145 × 125 × 162 mm
- Sensor weight
- <1 kg
- Transmitter weight
- 1.35 kg
- Sensor protection
- IP68 / NEMA6P
- Transmitter protection
- IP66 / NEMA4X
- Cable
- 10 m standard; extendable to 100 m
03
Recommended applications
Nitrification process
Track ammonia nitrogen through biological nitrification control points.
Aeration tanks
Monitor ammonia response alongside pH and temperature in wastewater treatment.
Industrial process water
Integrate continuous ammonia data into process and discharge controls.
Rivers and environmental water
Observe ammonia-nitrogen trends at river and environmental monitoring points.
04
Items to confirm
Identify the real water matrix and process point first, then confirm concentration span, pH, temperature, potassium, mounting and interfaces.
- 01Water matrix, process point and ammonia-control objective
- 02Minimum, normal, peak and alarm NH₄-N
- 03pH, temperature, potassium interference and optional K⁺ requirement
- 04Mounting space, cable, power, 4–20 mA, relays and RS485
05
Project documents available on request
After receiving the operating conditions, we prepare the configured datasheet, sensor and mounting confirmation, I/O schedule and quotation. The clean product image is not a dimensional drawing.
Get a quote- Configured model datasheet→
- Sensor and mounting confirmation→
- Cable and I/O schedule→
- Project quotation→
06
Compare the other PINH3 model
Compact Online Ammonia Nitrogen Analyzer
View product↗07
Selection questions
Does ion-selective measurement need pH and temperature data?+
Yes. Both supplied sheets integrate pH and temperature with the ammonia measurement for correction and compensation.
What is the main difference between PINH3-900 and PINH3-500?+
Both document NH₄-N 0.1–3000 mg/L. PINH3-900 also documents optional K⁺ 0.5–5000 mg/L and a Ø55 × 342 mm probe. PINH3-500 has no documented K⁺ option and uses a Ø37 × 253 mm probe.
Can the website image be used as a technical drawing?+
No. It provides consistent public presentation. Dimensions, interfaces and accessories come from the datasheet and order confirmation.
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.