The Ion-Selective Electrode (ISE) Online Sensor is a probe-type intelligent sensor. It features compensation for temperature, pH, and interfering ions, and adopts an RS485 interface with standard Modbus protocol. The sensor enables in-situ measurement without the need for reagents or sample pre-treatment, offering low maintenance and high operational efficiency.
The measurement principle of ion-selective electrodes (ISEs) is based on the relationship between the activity and concentration of ions in an electrolyte solution. An ISE typically consists of two electrodes: a working electrode and a reference electrode. The working electrode selectively responds to the target ion, while the reference electrode provides a stable potential as a reference.
The working electrode is usually coated with a selective membrane that exhibits a specific response to a particular ion. When the target ion interacts with the selective membrane, a change in electric potential is generated. By measuring this potential change, the concentration of the ion can be determined.
where:
| مبدأ العمل | Ion selection electrode method | ||||||||
| Measurement factors | NH4N | Na+ | NO3N | F- | Cl- | ||||
| نموذج المنتج | ISE NH4N-100 | ISE NH4N-200 | ISE NH4N-210 | ISE Na-200 | ISE Na-210 | ISE NO3N-200 | ISE F-200 | ISE Cl-200 | |
| Measurement factors | Ammonia nitrogen, temperature | Ammonia nitrogen, pH, temperature | Ammonia nitrogen, pH, K+, temperature | Na+, pH, temperature | Na+, pH, ammonia nitrogen, temperature | nitrate, Cl-, temperature | F-, pH, and temperature | Cl-, pH, temperature | |
| Measurement range(mg/L) | 0.1~1000 | 0.1~1000 | 0.1~1000 | 0.1~1000 | 0.1~1000 | 0.1~1000 | 0.1~10000 | 3~30000 | |
| / | pH 0~14 | pH 0~14 | / | / | / | pH 0~14 | pH 0~14 | ||
| Temperature 0~50 °C | Temperature0~50 °C | Temperature0~50 ℃ | Temperature0~50 ℃ | Temperature0~50 ℃ | Temperature0~50 ℃ | Temperature0~50 ℃ | Temperature0~50 ℃ | ||
| التكرار | ≤2%、<0.1pH、≤0.3℃ | ≤2%、≤0.3℃ | |||||||
| دقة القياس | ±5%or±0.1mg/L;Temperature < 0.3°C | ±5% or ±0.1mg/L;<0.1pH; Temperature < 0.3°C | ± 10% or ± 0.1mg/L; Temperature < 0.3°C | ± 10% or ± 0.5mg/L temperature < 0.3°C | |||||
| Compensation Scope: | / | pH 4~10 | pH 4~10K+;<100mg/L | NH4N+<100mg/L | / | Cl-<1000mg/L | pH 3.5-5 | / | |
| Low concentration drift (24h) | ±1%F.S | ||||||||
| انحراف النطاق (24 ساعة) | ±3%F.S | ||||||||
| حد الكشف | 0.1 ملجم/لتر | 0.05 ملغ/لتر | 0.05 ملغ/لتر | 0.1 ملجم/لتر | 0.1 ملجم/لتر | 3mg/L | |||
| قرار | 0.01 ملغ/لتر | ||||||||
| مستوى الحماية | IP68 | ||||||||
| واجهة الاتصال | RS485، بروتوكول Modbus القياسي، معدل الباود 9600، بت العنوان الافتراضي 50 | ||||||||
| الأبعاد: | (φ33*146)mm, cable 10 meters (can be customized) | (φ50*251)mm, cable 10 meters (customizable) | (φ60*270)mm, cable 10 meters (can be customized) | (φ60*270)mm, cable 10 meters (can be customized) | (φ50*251)mm, cable 10 meters (customizable) | (φ60*270)mm, cable 10 meters (can be customized) | (φ50*251)mm, cable 10 meters (customizable) | (φ50*251)mm, cable 10 meters (customizable) | |
| المواد | 316L الفولاذ المقاوم للصدأ/PVC/سبائك التيتانيوم اختياري | ||||||||
| الوزن | 0.2KG | 2KG | 1KG | 2KG | 1KG | 2KG | 1KG | 2KG | |
| خيوط التثبيت | الطرف العلوي NPT3/4 الخيط | ||||||||
| جهد التشغيل | 9~36V DC | ||||||||
| متوسط الوقت بين الأعطال | ≥ 1440 ساعة/الوقت | ||||||||
| استهلاك الطاقة | 0.5w | ||||||||
| فترة المعايرة | 1~3 months (depending on the water quality environment on site) | ||||||||
| بيئة العمل | (0~50) درجة مئوية | ||||||||
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