Water matrix and process point
State nitrification, aeration tank, industrial process, river or other duty and describe the sample.
NH₄-N · Online ion-selective electrode
Select online ammonia nitrogen measurement by water matrix, range and compensation requirements
PINH3-900 and PINH3-500 both cover 0.1–3000 mg/L NH₄-N with integrated pH and temperature compensation; PINH3-900 also supports optional K⁺ measurement.
2online analyzer models
0.1–3000 mg/LNH₄-N range
0.01 mg/Lammonia resolution
3 × 4–20 mAanalog outputs
01 · Start with the duty
Confirm the real water matrix and ion-compensation requirement
Ion-selective electrode response depends on the water matrix, pH, temperature and interfering ions. Selection cannot rely on maximum range alone; the process point, potassium conditions, mounting and interfaces must be confirmed.
Minimum, normal and peak
Provide minimum, normal, peak and alarm NH₄-N—not a single design value.
pH, temperature and potassium
Confirm pH, temperature, potassium interference and whether the PINH3-900 optional K⁺ measurement is required.
Mounting and interfaces
Confirm space, cable, power, 4–20 mA, relays, RS485, quantity and destination.
02 · Model architecture
PINH3-900 advanced compensation + PINH3-500 compact
Select by K⁺ compensation requirement, probe size, measuring range, outputs and available mounting space.
Advanced compensated configurationPINH3-900Online 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
Compact integrated configurationPINH3-500Compact 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
03 · Key specifications
Core PINH3 series technical parameters
Both models use ion-selective electrodes with integrated pH and temperature compensation, analog outputs, relays and Modbus RS485.
- 01NH₄-N range · 0.1–3000 mg/L
- 02Resolution · 0.01 mg/L; pH · 5–10
- 03Outputs · 3 × 4–20 mA / Modbus RS485
04 · Common questions
Confirm this information before an inquiry
How should I choose PINH3-900 or PINH3-500?+
Both have the same NH₄-N range. Compare PINH3-900 when optional K⁺ measurement or added ion compensation is required; choose PINH3-500 when a smaller probe is preferred and K⁺ measurement is not required.
Do both models measure pH and temperature?+
Yes. Both cover pH 5–10 and 0–40°C for integrated measurement and compensation.
How do the probe dimensions differ?+
PINH3-900 uses an Ø55 × 342 mm probe; PINH3-500 uses an Ø37 × 253 mm probe.
Which outputs are available?+
Both models provide three 4–20 mA outputs, three relays and Modbus RS485.
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.