Description

ABB 8225-FKM-PVDF-55T-C

1. Basic Information

ABB 8225-FKM-PVDF-55T-C is an integrated intelligent digital conductivity transmitter. It integrates electrode and transmission unit into one compact device, specially designed for high-precision measurement of conductivity and resistivity in pure water, ultra-pure water and mildly corrosive process fluids.

Adopting PVDF corrosion-resistant housing and FKM fluororubber sealing, equipped with 55T high-precision electrode, the transmitter features automatic temperature compensation, self-calibration and anti-fouling performance. With IP65 protection grade and 4-20mA standard signal output, it is widely used in water treatment, pharmaceutical, fine chemical and semiconductor industries for real-time water quality monitoring and process interlock control.

2. Technical Specifications

2.1 Measurement Performance

Model: 8225-FKM-PVDF-55T-C
Type: Integrated Digital Conductivity / Resistivity Transmitter
Electrode Type: 55T high-precision dedicated electrode for low-conductivity water
Measured Media: Pure water, ultra-pure water, deionized water, mild acid and alkali fluid
Measurement Range: 0.05µS/cm～200mS/cm wide range
Compensation: Built-in PT1000 automatic temperature compensation
Response Speed: Millisecond-level fast response
Output Signal: 4～20mA analog + digital communication

2.2 Material & Corrosion Resistance

Housing Material: PVDF anti-corrosion polymer
Sealing Material: FKM fluororubber, high temperature and aging resistance
Electrode Feature: Anti-fouling and anti-oxidation sensing electrode
Structure: Integrated one-piece design without split wiring
Adaptability: Resists mild acid, alkali and organic solvent erosion

2.3 Electrical & Environmental Parameters

Power Supply: 24VDC industrial DC power
Protection Grade: IP65 dustproof and waterproof
Medium Temperature: 0℃～+60℃
Storage Temperature: -20℃～+70℃
Humidity Range: 5%～95%RH (Non-condensing)
Operation Mode: Menu visual key operation, multi-language support

3. Features

55T High-precision Low-conductivity Measurement: Optimized algorithm for pure water and ultra-pure water low conductivity range, solving data jitter and inaccuracy problems of ordinary transmitters in high-purity water monitoring.
Excellent Corrosion Resistance: PVDF housing and FKM sealing ensure long-term stable operation in pure water and mild corrosive fluid environments, avoiding aging and leakage failures.
Automatic Temperature Compensation: Real-time temperature correction eliminates measurement deviation caused by water temperature fluctuation, ensuring consistent and accurate data under variable working conditions.
Integrated Simplified Structure: All-in-one electrode and transmitter design reduces wiring failure points, realizing convenient installation and low maintenance rate.
Intelligent Self-diagnosis & Calibration: Supports zero calibration, range adaptation and electrode status self-inspection, timely prompting pollution and aging faults.
Strong System Compatibility: Standard 4-20mA signal matches mainstream DCS/PLC systems, realizing real-time monitoring, over-limit alarm and process interlock.

4. Working Principle

Fluid Signal Acquisition: The 55T high-precision electrode senses the ion conductivity of the medium and collects original conductivity analog signals.
Real-time Temperature Sampling: The built-in PT1000 sensor synchronously collects medium temperature data for temperature compensation calculation.
Signal Processing & Compensation: The main control chip amplifies, filters and denoises the signal, and corrects measurement errors through temperature compensation algorithm.
Linear Calibration: Optimizes signal linearity through built-in calibration program to ensure full-range measurement accuracy.
Standard Signal Output: Converts accurate conductivity values into 4-20mA standard industrial signals and uploads to the control system.
Status Self-inspection & Early Warning: Continuously monitors electrode pollution, signal stability and hardware status to record abnormal data and assist maintenance.

5. Applications

5.1 Pure & Ultra-pure Water System

Monitors water quality conductivity of RO and EDI water production systems, evaluates the operating status of water purification equipment and ensures effluent quality compliance.

5.2 Pharmaceutical & Fine Chemical Industry

Applied in pharmaceutical purified water and clean process water systems, adapting to mild corrosive and high-cleanliness water quality detection requirements.

5.3 Semiconductor & Electronic Manufacturing

Precisely detects ultra-pure water conductivity for electronic cleaning and chip production processes, supporting high-standard industrial water quality control.

5.4 Industrial Water Treatment System

Realizes circulating water and reclaimed water quality monitoring, predicting scaling and ion exceeding risks to optimize water treatment process parameters.

5.5 Old Equipment Renovation & Replacement

Replaces aging split-type transmitters with inaccurate measurement and poor corrosion resistance, improving the stability and precision of industrial water quality monitoring systems.