Ion-selective electrode measurement directly detects ammonium ions in water
Compact integrated configuration · PINH3-500
Compact Online Ammonia Nitrogen Analyzer
A compact integrated ammonia, pH and temperature sensor for nitrification, aeration tanks, industrial processes and river-water monitoring where a smaller probe is preferred.
NH₄-N 0.1–3000 mg/LpH 5–10 · 0–40°CØ37 × 253 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
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
- pH range
- pH 5–10
- Temperature range
- 0–40°C
- Resolution
- NH₄-N 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; 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
- Ø37 × 253 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 at compact biological-treatment measurement points.
Aeration tanks
Use the integrated probe for ammonia, pH and temperature monitoring.
Industrial process water
Add online NH₄-N data to process-water and discharge monitoring.
Rivers and environmental water
Deploy a smaller probe at river and environmental monitoring locations.
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
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.