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Smart Ion-Selective Sensors | Ammonium, Fluoride, Calcium, Sodium

Ion-selective electrode sensors for ammonium, fluoride, calcium and sodium. M39×1.5 standard thread, 4-20mA and RS485 Modbus RTU dual output, IP68, fast response with removable electrode for easy cleaning.

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Description

Product Overview

The smart ion sensor series applies ion-selective electrode (ISE) measurement to determine the concentration of individual ions in water in real time. Each sensor targets a specific ion — ammonium, fluoride, calcium or sodium — giving process operators and environmental monitors a direct read-out of the species they care about.

All models share an M39 × 1.5 standard threaded body that suits pipe-mounted and submerged tank installation. The electrode assembly can be removed and cleaned quickly, and the sensors support both 4–20 mA and RS485 Modbus RTU output for straightforward integration.

Key Features

  • Ion-selective electrode method: Direct potentiometric measurement of the target ion.
  • Fast response: Rapid electrode response supports continuous online data acquisition.
  • M39 × 1.5 standard thread: Fits pipe and submerged tank installations.
  • Dual output: 4–20 mA (adjustable) and RS485 Modbus RTU.
  • Removable electrode: Electrode can be disassembled and cleaned quickly.
  • Automatic alarm: Data upload with exceedance warning.
  • Wide supply range: DC 9–30 V (12 V DC recommended).
  • IP68 protection: Sealed for continuous immersion.

Available Ion Models

Ion measured Model Measurement range pH range Housing
Ammonium (NH4+) MT-NHL 5×10⁻⁶–1 M (0.1–18000 ppm) 4–10 pH ABS
Fluoride (F⁻) MT-FBT 0.1–1900 ppm 5–7 pH POM + stainless steel
Calcium (Ca²⁺) MT-CA Configurable Application dependent POM + stainless steel
Sodium (Na⁺) MT-NA Configurable Application dependent POM + stainless steel

Technical Specifications

Item Specification
Measurement principle Ion-selective electrode (ISE)
Temperature range 0–50 °C
Power supply DC 9–30 V (12 V DC recommended)
Current output 4–20 mA (adjustable)
Current accuracy 1% FS
Data communication RS485 (Modbus RTU)
Protection rating IP68
Operating humidity < 90%
Process connection M39 × 1.5 standard thread
Installation Pipe-mounted or submerged tank

Applications

  • Industrial wastewater
  • Surface water
  • Secondary water supply
  • Aquaculture
  • Circulating cooling water
  • Groundwater monitoring

Frequently Asked Questions

How does an ion-selective sensor work?

Ion-selective electrode measurement uses a membrane that responds potentiometrically to a specific ion. The resulting potential is converted into a concentration value, giving a direct reading of that ion in the water.

Can one sensor measure several ions?

Each sensor is configured for a specific ion. Multi-ion monitoring is achieved by installing several sensors — ammonium, fluoride, calcium and sodium models can be combined on the same RS485 bus.

How is the electrode maintained?

The electrode assembly can be disassembled and cleaned quickly, which keeps routine maintenance short even under continuous online operation.

What pH range must the sample be in?

This depends on the ion model. The ammonium sensor operates over 4–10 pH, and the fluoride sensor over 5–7 pH. Staying inside the stated range keeps the measurement accurate.

Where is the sensor installed?

The M39 × 1.5 standard thread supports both pipe-mounted and submerged tank (investment) installations.

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High Quality

Stable performance, IP-rated field design, accurate measurement and reliable data for 24/7 water quality monitoring in harsh environments.

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Timely delivery to support your urgent orders and project schedules efficiently and professionally at any time.

Best Warranty

Professional Warranty: 12-month coverage plus long-term remote support for stable water quality monitoring and customer satisfaction.