Conductivity Transmitter

ACITEK G300 Online DO Transmitter + DO6800 High-temperature Dissolved Oxygen Electrode

1. Project Background
A fine chemical enterprise produces 50,000 tons of acrylate annually. Its reaction kettles operate at 80–120℃ and 0.6–1.0 MPa. Dissolved Oxygen (DO) must be strictly controlled within 0.5–1.5 mg/L. Excess DO causes side reactions and reduces product purity, while insufficient DO leads to incomplete chemical reaction and lower output.

The traditional polarographic electrodes suffered severe signal drift above 60℃, with membranes aging every 2–3 weeks. Frequent shutdown for calibration and replacement brought high maintenance costs and disrupted continuous production. The site adopted ACITEK G300 DO Transmitter + DO6800 High-temperature DO Electrode to solve the problems.



2. Product Specifications
ACITEK G300 Online DO Transmitter

Measuring range: 0.00–40.00 ppm, Accuracy: ±0.01 ppm
Working temperature: -10.0–130.0℃, automatic temperature compensation
Output: 4-20mA & Modbus RTU, compatible with DCS system
Protection class: IP65, explosion-proof design







ACITEK DO6800 High-temperature DO Electrode

Temperature resistance: 0–130℃, supports 130℃ SIP sterilization
Housing: 316L stainless steel, acid & alkali resistant
High-temperature resistant membrane, anti-aging and anti-fouling
Response time: t90 ≤ 60 s




3. Installation & Commissioning

Mounted on DN50 side port of reaction kettle, immersed 20–30 cm below liquid level, away from agitator and inlet to avoid bubble interference.
Shielded cabling to prevent electromagnetic interference.
Two-point calibration with oxygen-free water and air-saturated water. Stable performance lasts over 6 months after one calibration.
Linked with DCS: Automatic nitrogen purge when DO below set value; cut off nitrogen supply when DO exceeds limit.

4. Application Results (6-month operation)

Stable measurement: No signal drift at 120℃, DO fluctuation controlled within ±0.1 mg/L.
Low maintenance: Membrane service life extended from 2–3 weeks to 8–10 months. Calibration cycle reaches 6 months, maintenance workload reduced by over 70%.
Quality improvement: Acrylate purity rose from 99.2% to 99.7%, high-grade product rate increased by 12%.
Higher efficiency: Gas consumption cut by 18%. Shutdowns caused by DO faults were eliminated, with annual output increased by 2000 tons.
Durable performance: Continuous trouble-free operation for 180 days, no corrosion orscaling on electrode.

5. Customer Feedback
"This high-temperature DO monitoring solution perfectly solves our pain points of unstable reading and frequent maintenance. The G300 transmitter delivers reliable data and smooth communication. The DO6800 electrode works well under high temperature. It greatly guarantees our continuous production and product quality." — Manager Wang, Equipment Department

6. Applicable Scenarios

Chemical industry: High-temperature reaction kettles, polymerization & oxidation processes, high-temperature wastewater
Pharmaceutical industry: Fermenters with 121℃ SIP sterilization
Power industry: Boiler feed water and condensed water trace oxygen monitoring
Environmental protection: High-temperature industrial wastewater & leachate treatment

1. Product Overview
Manufactured in Shanghai, China, the ACITEK G400-COND is a fixed-installation 4-wire conductivity transmitter tailored for industrial production and laboratory precision monitoring. Featuring a glass bead reinforced PBT enclosure and PP structural materials, the device delivers ultra-wide-range conductivity measurement (0.000 μS/cm – 200.0 mS/cm). It supports all mainstream 2-electrode and 4-electrode sensors, with freely selectable cell constants from 0.005 to 20 cm⁻¹, and compatible with Pt1000 and NTC 30 kΩ temperature detectors.
Equipped with a high-contrast LCD display, dual current outputs, two floating relay contacts, and dual 24VDC/230VAC power supply options, the transmitter integrates real-time sensor monitoring and preventive maintenance prompts. It supports wall, pipe and panel mounting, features intuitive operation and on-site medium calibration, and offers OEM/ODM customization with a standard one-year warranty.
2. Core Product Advantages
The G400-COND solves key pain points of traditional conductivity monitoring with outstanding comprehensive performance. Its full-range measurement adapts to various liquid environments without equipment replacement. Dual independent outputs realize synchronous detection and signal transmission of conductivity and temperature, supporting precise system control. The built-in relay alarm function enables automatic on-site equipment linkage without additional modules.
With corrosion-resistant and durable industrial-grade housing, it adapts to harsh production environments. Meanwhile, portable calibration, factory reset function and intelligent maintenance reminders greatly reduce daily operation and maintenance costs, ensuring long-term stable and accurate measurement data.
3. Main Application Scenarios
3.1 High-Purity Water Monitoring (Pharmaceutical, Electronics, Power Industry)
Widely used in pharmaceutical water for injection, semiconductor cleaning water and power plant boiler feedwater monitoring. Matched with low cell constant electrodes, it realizes real-time monitoring of water ion purity and automatic temperature compensation. It triggers alarms and linkage protection when water conductivity exceeds the standard, effectively avoiding product contamination and equipment scaling, and meeting GMP and industrial safety supervision standards.
3.2 Industrial Circulating Water & Cooling Tower Control
Applied to factory cooling circulating water systems, it monitors conductivity changes caused by water evaporation and salt accumulation in real time. By setting threshold parameters, it automatically controls pipeline blowdown and scale inhibitor dosing, optimizes water circulation concentration ratio, reduces fresh water consumption and chemical costs, and prevents pipeline corrosion and blockage.
3.3 Chemical & Electroplating Process Concentration Control
Adaptable to acid-base mixing solutions and electroplating bath liquid monitoring. By configuring different cell constants for solutions of varying concentrations, it realizes closed-loop automatic control of solution concentration through relay-linked dosing pumps. It also monitors the salinity of factory wastewater discharge to ensure compliance with environmental protection discharge standards and stabilize product yield.
3.4 Sewage & Reclaimed Water Treatment
Installed in sewage treatment tanks and discharge pipelines, it uses conductivity data to reflect water TDS content, quickly identify sudden impact of high-salinity wastewater, and monitor the treatment effect of reclaimed water. Real-time data upload meets environmental supervision recording requirements and helps optimize biochemical treatment processes.
3.5 Food & Beverage CIP Cleaning Monitoring
Used for pipeline CIP acid-base cleaning process monitoring in food and beverage factories. It judges detergent concentration and fresh water rinsing endpoint through conductivity values, avoids residual cleaning agents affecting food safety, realizes automated cleaning control, and saves water and detergent resources.
3.6 Laboratory Analytical Testing
Suitable for long-term fixed monitoring of laboratory sample solutions. It supports flexible parameter calibration and cell constant adjustment, with a clear high-contrast display. The integrated temperature detection function realizes comprehensive analysis of solution properties, simplifying laboratory daily detection and instrument maintenance work.
4. On-Site Application Compatibility
The G400-COND boasts strong on-site adaptability. Three installation methods adapt to equipment rooms, outdoor stations and laboratory cabinets. The universal power supply design matches mainstream industrial power systems, and standard 4–20mA analog signals are seamlessly compatible with PLC, DCS and monitoring hosts. It supports most mainstream sensors on the market, reducing equipment upgrade costs. Customized services can meet the personalized needs of system integrators and manufacturers.
5. Conclusion
The ACITEK G400-COND conductivity transmitter is a multi-scenario, high-stability monitoring instrument integrating detection, alarm and signal transmission. With full-range measurement, intelligent control, simple operation and strong environmental adaptability, it covers mainstream monitoring scenarios such as industrial water treatment, chemical production, food processing and laboratory testing. With reliable quality and perfect after-sales guarantee, it provides efficient, low-cost and automated conductivity monitoring solutions for various industries.

1. Product Application Overview
ACITEK G100-DO is a miniature DIN rail-mounted dissolved oxygen (DO) transmitter specially designed for industrial process water quality monitoring. With an ultra-narrow 12.5 mm modular housing, 4–20 mA active analog output, RS485 communication, 24 VDC power supply and integrated temperature measurement function, it perfectly solves the installation limitation of narrow control cabinets, compact fermenters and small-scale process monitoring stations. Matched with 12 mm diameter 316L stainless steel DO sensor (IP65 protection), it delivers fast response within 1 minute and stable long-term measurement, widely deployed in chemical, pharmaceutical, biotechnology, food & beverage, energy industries, industrial wastewater treatment and laboratory process analysis. The complete package includes DIN rail transmitter, stainless steel DO sensor, mounting fittings, signal cable, flow cell and operation manual, supporting OEM & ODM customized service for diversified on-site working conditionsacitekinst....

2. Industry-Specific Application Scenarios
2.1 Biotechnology & Pharmaceutical Fermentation
Biopharmaceutical and microbial fermentation processes require precise real-time dissolved oxygen control to guarantee strain reproduction, metabolite yield and drug purity.


Core application: Small & medium-sized bioreactors, seed culture tanks, cell culture lines.
Application advantages:

Ultra-thin 12.5 mm body allows centralized installation in dense PLC control cabinets with multi-channel parameter transmitters (pH, conductivity, DO) without cabinet space shortage.
Built-in manual calibration keys (K3/K4) support on-site one-point/two-point calibration without extra handheld calibrators; calibration cycle is recommended once every 3 months to sustain measurement accuracy.
Stainless steel 1.4435 sensor probe adapts to repeated SIP/CIP high-temperature sterilization sanitary working conditions, avoiding corrosion from culture medium and organic solvents.
4–20 mA signal connects to DCS/PLC to realize automatic linkage of stirring speed and aeration flow, stabilizing DO concentration in fermentation broth and improving production batch consistency.


Typical case: Antibiotic, amino acid, vaccine cell culture production lines.

2.2 Food & Beverage Production
Dissolved oxygen directly determines product flavor, shelf life and oxidation stability in food processing.


Core application: Beer/wine fermentation, pure water production, beverage filling pretreatment, dairy processing.
Working value:

Monitor low-level residual oxygen in finished water and beverage pipelines to suppress fat oxidation, color fading and flavor deterioration.
Fermentation tank online monitoring: control oxygen supply in yeast growth stage to avoid excessive DO causing off-flavor in finished wine.
Compact DIN rail design fits small beverage factory central control cabinets, realizing multi-point DO monitoring for multiple production lines with low overall investment cost.


Matching hardware: 12 mm stainless steel sanitary DO sensor with silicone sealing, compatible with food-grade fluid pipelines.

2.3 Chemical Industry Process Monitoring
Chemical synthesis, polymerization and fine chemical reactions are sensitive to dissolved oxygen to prevent invalid oxidation side reactions.


Application points: Chemical reaction kettles, solvent recovery systems, intermediate water circulation pipelines, fine chemical pilot test lines.
Product highlights for chemical sites:

4-wire system with 14–24 VDC wide voltage power supply, stable signal transmission under factory electromagnetic interference.
RS485 Modbus communication supports distributed networking, enabling centralized remote data collection of dozens of monitoring points.
Low-cost modular measurement station solution, ideal for small-batch pilot chemical workshops with limited cabinet space.



2.4 Energy & Power Industry Water Treatment
High dissolved oxygen in boiler feed water, cooling circulating water and thermal power sampling water will cause pipeline and equipment corrosion, shortening service life.


Core scenario: Thermal power plant condensate sampling rack, boiler deaerator outlet monitoring, cooling water circulation system.
On-site advantages:

Slim DIN rail transmitter can be densely arranged on sampling rack small-sized control boxes.
Synchronous measurement of dissolved oxygen and medium temperature, providing dual-parameter data for water chemical supervision.
4–20 mA analog signal uploads DO data to power plant monitoring system to trigger deaeration equipment linkage control.



2.5 Industrial Wastewater & Environmental Water Treatment
Aerobic and anaerobic biochemical tanks rely on precise DO adjustment to optimize activated sludge treatment efficiency and reduce aeration energy consumption.


Applications: Factory sewage treatment stations, small municipal wastewater aerobic tanks, discharge water quality monitoring wells.
Field performance:

IP65 stainless steel sensor probe resists sludge adhesion and weak corrosive wastewater medium.
Fast 1-minute response time timely reflects DO fluctuation in biochemical tanks to adjust fan operation frequency and cut power consumption.
Low maintenance cost, suitable for scattered small sewage treatment stations with limited operation manpower.



2.6 Laboratory & Pilot Test Equipment
Universities, R&D laboratories and pilot workshops have compact test equipment with limited installation space.


Usage scene: Laboratory bench bioreactors, small water quality test circulation devices, material oxidation test systems.
Laboratory advantages: Miniature transmitter saves laboratory control box space; simple manual calibration operation meets frequent experimental parameter calibration demands; one-year warranty and customizable OEM labels support laboratory self-developed test equipment matching.

3. Installation & System Application Modes
3.1 DIN Rail Central Cabinet Installation
The G100-DO transmitter adopts standard 35 mm DIN rail mounting, dozens of units can be side-by-side installed together with pH, conductivity transmitters inside narrow control cabinets, realizing multi-parameter centralized monitoring of the whole production line, which is the most mainstream application mode for medium and small factories.

3.2 Independent Small-Scale Monitoring Station
Matched with flow chamber, mounting bracket and cable, it forms a complete compact DO measuring station for single reactor, single pipeline or single wastewater tank independent monitoring, without large integrated analysis cabinet, greatly reducing equipment procurement and cabinet transformation cost.

3.3 PLC/DCS Automatic Control System Integration

Analog output: 4–20 mA active current signal accesses PLC analog module to realize closed-loop automatic control of aeration, stirring, deaeration equipment.
Digital communication: RS485 Modbus-RTU connects to industrial gateway, uploading DO & temperature data to upper computer, SCADA or cloud platform for remote real-time viewing and historical data recording.

4. Application Advantages Over Traditional Large DO Transmitters

Space-saving layout: Only 12.5 mm width, solving the installation bottleneck of narrow cabinets and compact equipment that large display transmitters cannot fit.
Cost-effective construction: Low unit price plus modular assembly reduces the total investment of multi-point monitoring stations, especially suitable for small factories and pilot projects.
Wide universal compatibility: One set of equipment covers biotech, food, chemical, energy and environmental protection industries; stainless steel sensor adapts to sanitary, corrosive and aqueous working conditions.
Easy on-site maintenance: Independent K3/K4 calibration buttons support field calibration without removing the transmitter from the cabinet; recommended quarterly calibration ensures long-term stable measurement.
Dual signal output: Simultaneous 4–20 mA analog and RS485 digital communication, compatible with both traditional PLC control and modern industrial internet remote monitoring systems.

5. Application Matching Notes

For sanitary fermentation and food production, select 1.4435 stainless steel sanitary DO sensor; for chemical wastewater, 316L stainless steel probe is recommended.
The transmitter body protection grade is IP20, so it must be installed inside closed control cabinets; the matched DO sensor reaches IP65 and can be directly inserted into pipelines or tanks.
Power supply range: 14–24 VDC 4-wire connection, avoid long-distance thin wire power supply to prevent voltage drop affecting measurement stability.
OEM/ODM customization is available for special industrial application requirements, including logo printing, cable length adjustment and flow chamber modification.

1. Drinking Water Quality Online Monitoring


Drinking water safety supervision requires continuous tracking of dissolved ion content to judge raw water pollution, treatment efficiency and pipeline secondary contamination, which is the primary application scenario of CR-GS-10.


Application Points



Water plant full-process monitoring

Install CR-GS-10 at raw water intake, sedimentation tank outlet, filter section and finished water pipeline. Abrupt conductivity rise of raw water can warn agricultural chemical infiltration or industrial wastewater leakage; comparing conductivity before and after filtration evaluates the removal efficiency of mineral ions and impurities, ensuring finished water complies with national drinking water standards.
Community & commercial direct drinking water equipment

Mount the sensor on RO direct drinking machines in schools, hospitals, office buildings and shopping malls. Real-time conductivity data reflects filter element aging and membrane attenuation: once effluent conductivity surges, the system triggers maintenance reminder to avoid unqualified drinking water supply.



Matching Product Advantages



Platinum electrode features strong chemical inertness, resisting corrosion from residual chlorine in tap water and long-term stable measurement without frequent calibration;
Compact structure with Pg13.5, G1/2A and NPT multi-thread interfaces, easy to install on small-sized commercial water dispensers and pipeline flow cells;
Wide measuring range (0.05 μS/cm ~ 100 mS/cm) covers both low-conductivity purified water and medium-conductivity tap water.



2. Ion Exchange & Reverse Osmosis (RO) Pure Water Treatment Systems


Ion exchangers and reverse osmosis equipment are core processes for industrial pure water preparation, where conductivity is the key index to judge resin failure and RO membrane desalination performance, making CR-GS-10 an essential online monitoring component.


2.1 Ion Exchange Resin Regeneration Monitoring


Cation and anion exchange resins gradually lose ion exchange capacity during operation, accompanied by rising effluent conductivity. Install CR-GS-10 at the outlet of mixed bed/separate bed ion exchangers:



Set conductivity threshold linkage control; when readings exceed the standard value, the system automatically starts acid-alkali regeneration program;
Avoid manual periodic sampling detection, reduce labor cost and prevent unqualified pure water from flowing into downstream production lines.



2.2 Reverse Osmosis System Operation Control



Monitor primary and secondary RO product water conductivity to judge membrane integrity: conductivity jump indicates membrane rupture, seal failure or scaling blockage;
Install sensors on raw water inlet and concentrated water outlet to calculate water recovery rate, optimize dosing of scale inhibitors, reduce chemical consumption and extend membrane service life.



Matching Product Advantages



Stable operation under 6 bar process pressure, adapting to pipeline pressure of standard RO water treatment equipment;
Wide temperature adaptation (-5~+80°C) fits warm water circulation systems in industrial pure water workshops;
Low overall investment cost, suitable for mass deployment on medium and small-sized pure water equipment manufacturers.



3. Aquarium & Aquaculture Water Quality Management


Household aquariums, commercial ornamental fish breeding farms and hydroponic planting facilities all rely on conductivity to control water mineralization degree, and CR-GS-10 provides economical continuous detection solutions for civilian and small aquaculture scenes.


Application Points



Ornamental fish tank water adjustment

Different fish species have fixed adaptive mineral concentration ranges. CR-GS-10 continuously monitors water conductivity to guide regular water replacement and mineral additive dosing, avoiding fish stress or death caused by excessive or insufficient dissolved solids.
Small-scale aquaculture & hydroponics

Deploy the sensor in indoor hydroponic vegetable planting pools and mini aquatic breeding ponds. Conductivity fluctuation reflects nutrient solution concentration change, helping growers adjust fertilizer dosage in real time to stabilize plant growth environment.



Matching Product Advantages



Small and lightweight design, plug-type installation option without complex pipeline transformation;
One-year warranty reduces post-maintenance cost for aquarium merchants and individual users;
Platinum electrode resists biological adhesion of algae and aquatic microorganisms, maintaining stable measurement in long-term immersion.



4. General Laboratory & Multi-Scenario Routine Water Testing


Beyond industrial and civilian online monitoring, CR-GS-10 also serves as a universal conductivity probe for laboratory daily water analysis, matching small water quality analyzers for offline sampling measurement.


Application Points



Lab daily pure water machine effluent detection, verifying lab-grade purified water quality for chemical, environmental and biological experiments;
Routine sampling testing of surface water, groundwater and domestic sewage, recording conductivity changes as auxiliary pollution evaluation data;
Teaching laboratory demonstration experiments for water quality detection courses.



Matching Product Advantages



Dual-purpose design for online pipeline installation and offline immersion measurement;
K=10 cell constant compatible with mainstream conductivity transmitters and lab meters on the market, convenient equipment matching and replacement;
Robust glass electrode body with impact resistance, suitable for frequent mobile use in laboratories.



5. Universal Municipal & Light Industrial General Water Quality Inspection


CR-GS-10 can be extended to multiple light industrial and municipal auxiliary water monitoring scenarios:



Circulating cooling water monitoring for small factories: control conductivity to adjust blowdown frequency and reduce scaling and pipeline corrosion;
Swimming pool and spa water supervision: track total dissolved solids to assist disinfectant concentration management;
Landscape river and community fountain water quality regular monitoring, timely reflect external pollution input.



Core Product Strengths Supporting Multi-Scenario Application



Platinum electrode core material: Inert metal avoids oxidation and ion precipitation, long service life, minimal measurement drift after long-term underwater immersion;
Ultra-wide measuring range: 0.05 μS/cm to 100 mS/cm covers nearly all conventional clean water and lightly polluted water measurement demands;
Strong environmental adaptability: -5~+80°C temperature range and 6 bar pressure resistance adapt to most normal industrial and civilian water pipeline operating conditions;
Flexible installation compatibility: Three connection modes (Pg13.5 screw head, G1/2A & 1/2"-14 NPT thread, plug connector) match various pipeline sizes and equipment interfaces;
High cost performance: Compact integrated structure, low procurement cost, one-year full warranty, ideal for mass installation in medium and small water treatment projects.



Conclusion


As a versatile platinum two-electrode conductivity sensor, ACITEK CR-GS-10 covers full-chain application from municipal drinking water, industrial pure water preparation to civilian aquaculture and laboratory testing. Its balanced performance of measurement stability, environmental adaptability and cost advantage solves the demand of economical and reliable real-time conductivity monitoring for most conventional water quality scenes. For engineering integrators, water equipment manufacturers and laboratory users focusing on general water detection, CR-GS-10 is a preferred universal conductivity probe with wide compatibility and stable running performance.

1. Project Background
A medium-sized biopharmaceutical manufacturer in Jiangsu runs a full-process purified water system, including multi-media filtration, activated carbon filter, two-stage RO reverse osmosis, mixed ion exchange bed and finished water storage tank. Purified water is used for reagent preparation, equipment cleaning and injection auxiliary production, requiring stable conductivity ≤ 2.0 μS/cm (25°C) to meet GMP standards.

Original Monitoring Pain Points

Adopted old 2-wire conductivity controllers, severe measurement polarization error under low conductivity; readings fluctuated ±0.5~1.2 μS/cm, unable to judge resin failure accurately.
Only single 4-20mA conductivity output, no independent temperature signal; PLC could not realize automatic temperature compensation logic.
Single relay output only supports simple high-limit alarm, cannot interlock resin regeneration pump and RO bypass valve synchronously.
No intelligent sensor diagnosis function; electrode fouling or cable aging could not be pre-warned, leading to long-time unqualified water without discovery.
Single panel mounting mode, difficult to install beside vertical ion exchange tanks, extra bracket costs required.

Project Demand

Stable low-conductivity detection for RO & mixed bed outlet, eliminate polarization error
Dual independent 4-20mA outputs for conductivity + temperature synchronous transmission
Dual floating relays for automatic linkage of regeneration and bypass protection
Multi-installation modes: wall / pipe / panel mounting to fit all process points
Built-in sensor monitoring & preventive maintenance reminder function
Compatible with all analog two-electrode platinum probes (ACITEK CR-GS-10 K=10)

2. Solution Deployment
The factory fully replaced old controllers with ACITEK G400-COND 4-wire conductivity transmitters, matching CR-GS-10 platinum two-electrode sensors, complete system layout as below:

2.1 Equipment Configuration

Transmitter: ACITEK G400-COND, 4-wire signal acquisition, PBT reinforced industrial enclosure, 24VDC power supply;
Matching electrode: CR-GS-10 platinum conductivity probe, cell constant K=10, installed via G1/2 pipeline thread;
Signal design:

Channel 1 4-20mA: Conductivity value (0–20 μS/cm customized range for purified water)
Channel 2 4-20mA: Real-time water temperature (0–60°C)
Relay 1: High conductivity alarm, trigger mixed bed acid-alkali regeneration pump
Relay 2: Ultra-high conductivity interlock, open RO bypass valve to drain unqualified water


Installation layout:

RO front/back monitoring points: Panel mounting inside control cabinet
Ion exchange tank outlet: Pipe wall mounting with matching hoop accessories
Finished water pipeline: Wall-mounted beside flow cell


Calibration: On-site one-point solution calibration, support one-key factory reset for routine maintenance.

2.2 Core Technical Matching Advantages of G400-COND

4-wire measurement anti-polarization technology Separate current excitation and signal collecting circuit, completely eliminate ion polarization interference in low-ion purified water, stable reading fluctuation controlled within ±0.08 μS/cm, fully meet pharmaceutical water precision requirements.
Dual independent 4-20mA current outputs Conductivity and temperature transmit signals separately to workshop PLC, realizing automatic 25℃ benchmark temperature compensation program, no manual parameter modification needed when water temperature changes in workshop.
Dual floating relay contacts for multi-linkage control Two groups of independent relays realize graded control: early warning regeneration & emergency bypass, avoid mass unqualified purified water entering production line, reduce waste loss.
Multi-scene flexible installation Support panel, wall and pipe three installation ways, no customized bracket required for vertical tank measuring points, cut on-site installation material and labor cost by 30%.
Intelligent sensor continuous monitoring & maintenance prompt Real-time judge electrode fouling, cable open/short circuit, pop up maintenance icon on high-contrast LCD screen; technicians can schedule cleaning and calibration in advance, avoid blind sampling inspection.
Wide adaptable cell constant range Freely set cell constant 0.005 ~ 20 cm⁻¹, compatible all existing two-electrode and four-electrode analog sensors of the factory, no need to replace original probes, save renovation investment.

3. On-Site Operation Effect After 6 Months Running
3.1 Measurement Accuracy & Stability Improvement

Original equipment fluctuation: ±0.5~1.2 μS/cm → G400-COND fluctuation ≤ ±0.08 μS/cm
Early warning time of resin failure advanced by 2–3 hours, avoid delayed regeneration leading to conductivity over-limit.

3.2 Automatic Control Economic Benefits

Purified water waste reduced by 82%: Bypass interlock function automatically cut off unqualified water, monthly loss of discarded water reduced by over 12,000 L.
Regeneration chemical consumption saved by 21%: Accurate conductivity threshold trigger regeneration, reduce redundant acid/alkali dosing frequency.
Labor maintenance cost down 65%: Intelligent diagnosis reduces daily manual sampling frequency from 4 times/day to 1 time/day, maintenance workload greatly relieved.

3.3 Environmental & Compliance Value
Continuous traceable conductivity & temperature data fully meet GMP audit data recording requirements; stable long-term operation without drift passes factory quarterly third-party water quality inspection all times.

Customer Feedback
“The ACITEK G400-COND 4-wire transmitter solved our long-standing unstable low-conductivity measurement problem. Dual signal output and dual relay linkage greatly optimize our purified water automatic control logic, the multi-installation design also simplified our on-site reconstruction work. After half a year of operation, data is stable and maintenance work is significantly reduced, which is a cost-effective upgrade solution for pharmaceutical water systems.” ——Water Treatment Supervisor, Biopharmaceutical Plant

4. Extended Application Cases of G400-COND
Case 2: Electronics Factory Ultra-Pure Water Monitoring
Matched low K=0.01 electrode, monitor EDI outlet ultra-pure water, real-time judge filter element aging, guarantee wafer cleaning water quality, support long-distance cable transmission up to 50m without signal attenuation.

Case 3: Cooling Circulating Water Blowdown Control for Machinery Factory
Set high conductivity threshold linkage blowdown valve, control water salt concentration, reduce fresh water replenishment and scale inhibitor dosage, annual water saving over 10,000 tons.

Case 4: Municipal Drinking Water Ion Exchanger Station
Wall-mounted layout for outdoor equipment room, wide temperature LCD display visible under strong light, one-year warranty reduces after-sales maintenance pressure for municipal engineering integrators.

5. Comprehensive Product Strength Summary Verified by Field Cases

Universal 4-wire anti-polarization measurement, cover full range 0.000 μS/cm ~ 200 mS/cm, adapt ultra-pure water to medium-concentration industrial water;
Dual current output + dual relay multi-linkage function, integrate measurement, display and automatic control into one unit, no extra secondary control module needed;
Three installation modes + dual power supply (24VDC/230VAC), fit cabinet, workshop pipeline and outdoor equipment room;
Intelligent sensor diagnosis + preventive maintenance prompt, lower long-term operation & maintenance cost;
Wide compatible cell constant and temperature sensor (Pt1000/NTC30k), support OEM/ODM customization for water equipment manufacturers;
Industrial PBT corrosion-resistant housing, stable continuous 24h online operation with 12-month global warranty.

6. Conclusion
ACITEK G400-COND 4-wire conductivity transmitter perfectly solves the measurement error, single control signal and single installation pain points of traditional 2-wire controllers. Verified by pharmaceutical purified water, electronic ultra-pure water, industrial circulating water and municipal water treatment projects, it provides integrated display, measurement and automatic linkage control solution for all analog conductivity sensors. For water system integrators, pharmaceutical, electronics and municipal water plants pursuing high precision and low maintenance monitoring, G400-COND is a reliable cost-performance 4-wire conductivity control host.