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PEC-700
PROBEST
PEC-700 Electrode-Free Inductive Conductivity Sensor
Working Principle
The PEC-700 inductive conductivity sensor works on electromagnetic induction theory. Thanks to its electrode-free structure, polarization problems are fully eliminated, making it the optimal solution for measuring high-conductivity fluid, slurry with suspended solids, and scaling-prone process media.
Core Product Features
Ultra-wide measuring range: 0–2000 mS/cm, covers most industrial conductivity measurement scenarios
Superior corrosion resistance: PP / PFA material optional, stable in pH 0–14 strong acid & alkaline liquid
High temperature resistance: PFA construction can operate continuously under 120°C
Flexible installation: flange / insertion / submersible / flow-through / tee-type / thread connection, compatible with all pipeline & tank systems
Precise & repeatable reading: Conductivity accuracy ±1.0% FS, repeatability ≤1%
Industrial communication: Standard Modbus RTU over RS485, easy PLC & DCS system integration
IP68 high ingress protection: Reliable operation under submerged, wet, dusty harsh environments
Multi-channel control: 4-channel output + relay control, save power & lower running cost
Low lifecycle cost: Only simple cleaning every 3–6 months, minimal maintenance workload
Application Scenarios
Chemical industry, brine / salt water monitoring, industrial wastewater treatment, electroplating, mining slurry, high-concentration acid & alkali process, scaling liquid online measurement
Features
Electrodeless design: Eliminates polarization problems, ideal for high-conductivity media, suspended-solids media, or scaling-prone media
Wide measuring range: Conductivity measurement range of 0–2000 mS/cm, applicable to various industrial and water quality scenarios
Excellent corrosion resistance: Withstands strong acids and alkalis (pH 0–14), with optional PP or PFA wetted materials
Flexible mounting: Supports flange, insertion, submersible, flow-through, tee-type, threaded connection and other mounting methods
High accuracy and repeatability: Conductivity accuracy up to ±1.0%FS, repeatability ≤1%
Communication: Supports standard Modbus RTU protocol with RS485 output for seamless system integration
High ingress protection: IP68 rated, suitable for harsh operating environments
Multi-channel configuration: Supports 4-channel outputs and relay control, reducing overall system costs
Extended cable option: Standard 5-meter cable, extendable on request to accommodate various site layouts
Low maintenance cost: Simple cleaning every 3–6 months under normal operating conditions, easy to maintain
Measuring Principle: Electromagnetic induction method
Measuring Range Conductivity: 0–2000 mS/cm; Salinity: 0–100 mS/cm (0–72 ppt)
Accuracy Conductivity: ±1.0%FS (0.1–2000 mS/cm); Salinity: ±1.5%FS
Repeatability ≤1%
Resolution Conductivity / acid-base concentration: ±0.1%FS; Salinity: ±0.1 ppt
Temperature Range PP material: 0–50℃; PFA material: 0–120℃
Power Supply: 9–36 VDC, <0.5W@12V
Communication Protocol: Modbus RTU
Protection Rating: IP68
Wetted & Structural Materials: 316L stainless steel, PP/PFA
No. | Measured Medium | Concentra tion Range | Medium Temperatu re Range | PP Material Electrode (Operating temp: 0–50℃) | Remarks |
1 | H₃PO₄ (Phosphoric Acid) | 0–40% | 0–75℃ | Applicable within 0–50℃ | — |
2 | HCl (Hydrochloric Acid) | 0–18% | 0–65℃ | Applicable within 0–50℃ | — |
3 | HCl (Hydrochloric Acid) | 22–36% | 0–65℃ | Not applicable | — |
4 | NaOH (Sodium Hydroxide) | 0–16% | 0–100℃ | Applicable within 0–50℃ | — |
5 | CaCl₂ (Calcium Chloride) | 0–22% | 15–55℃ | Applicable | — |
6 | HNO₃ (Nitric Acid) | 0–28% | 0–50℃ | Not applicable | PP is not resistant to oxidation by dilute nitric acid |
7 | HNO₃ (Nitric Acid) | 36–96% | 0–50℃ | Not applicable | PP becomes brittle and cracks in contact with concentrated nitric acid |
8 | H₂SO₄ (Sulfuric Acid) | 0–30% | -1–110℃ | Applicable within 0–50℃ | Suitable for dilute sulfuric acid |
9 | H₂SO₄ (Sulfuric Acid) | 40–80% | -1–115℃ | Not applicable | Medium- concentration sulfuric acid corrodes PP at elevated temperatures |
10 | H₂SO₄ (Sulfuric Acid) | 93–99% | -1–115℃ | Not applicable | PP is not resistant to fuming / concentrated sulfuric acid |
11 | HF (Hydrofluoric Acid) | 0–30% | 18–25℃ | Not applicable | HF slowly penetrates and embrittles PP material |
12 | NaCl (Sodium Chloride) | 0–25% | 0–50℃ | Applicable | — |
13 | KOH (Potassium Hydroxide) | 0–30% | 0–50℃ | Applicable | — |
14 | Seawater | — | 0–50℃ | Applicable | For conductivity or salinity measurement |
