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    COMMERCIAL CHEMICAL DOSING

    Precision dosing.Reliable pool treatment.

    Commercial calcium hypochlorite dosing systems designed for demanding aquatic environments, with specialist installation, integration and technical support from Ultra Automation across South East Queensland and Northern NSW.

    WDT GRANUDOS calcium hypochlorite dosing system

    WDT GRANUDOS commercial calcium hypochlorite and acid feeder

    System architecture

    How commercial dosing works:Controllers vs. dosing feeders.

    Commercial water treatment relies on two distinct, coordinated technologies: an autocontrol instrument that measures water chemistry, and dosing equipment that accurately introduces treatment chemicals.

    Typical Commercial Chemical Control Loop

    STEP 01Water Sampling

    Continuously drawn from pool circulation line ahead of filters.

    STEP 02Chemical Measurement

    Free chlorine, pH, redox & temperature measured in acrylic block.

    STEP 03Controller Decision

    WDT controller calculates proportional dosing pulse or run-time.

    STEP 04GRANUDOS Feeder

    Meters dry granulate & acid, dissolves completely in cone.

    STEP 05Treated Circulation

    Clean solution injected into main return pipework via venturi.

    Note: Illustration represents a typical commercial installation. Final hydraulic configuration, motive water source, injector placement and safety interlocks depend on site and plant-room engineering review.

    WDT Product Range

    Werner DosiertechnikGRANUDOS systems.

    German-engineered dry chlorine granulate and acid dosing equipment verified from official manufacturer documentation. Each model is tailored to specific pool configurations, bather loadings and plant layouts.

    WDT GRANUDOS-FLEX-TOUCH calcium hypochlorite dosing unit
    Flexible Single-Pool Dosing

    GRANUDOS-FLEX-TOUCH

    Compact dry chlorine granulate and acid dosing system for individual commercial pools. Self-cleaning dissolving cone prevents sludge and clogging. All wetted parts in corrosion-resistant materials.

    Application:Individual commercial and public pools, hotels, resorts and strata facilities.
    Dosing Capacity:Up to ~70 g/h calcium hypochlorite at 70% available chlorine.
    Key Characteristics:
    • Integrated dissolving cone with high-velocity water swirl
    • Proportional dosing output from controller signal
    • Acid dosing for pH correction via separate dosing channel
    • Level monitoring and dry-run protection
    WDT FLEX-CPR TOUCH XL integrated dosing and measurement system
    Integrated Measurement + Dosing

    FLEX-CPR TOUCH XL

    Combined measuring cell and GRANUDOS-FLEX dosing unit paired with a CPR Touch XL 7-inch colour touch controller for integrated free chlorine, pH, ORP and temperature measurement, data logging and remote browser access.

    Application:Commercial and public pools requiring integrated control and remote visibility.
    Dosing Capacity:Proportional granulate dosing sized to CPR Touch XL control output.
    Key Characteristics:
    • Self-cleaning platinum redox and gold free-chlorine electrodes
    • Modbus TCP and USB data export
    • Remote indication via tablet or smartphone browser
    • Event and measuring-value data logging
    WDT GRANUDOS-VARIO-TOUCH high-capacity dosing system
    Variable High-Capacity Dosing

    GRANUDOS-VARIO-TOUCH

    Higher-capacity calcium hypochlorite dosing system for larger commercial pools and demanding bather loads. Configurable dosing throughput and multi-dosing-point capability when combined with a suitable WDT controller.

    Application:Aquatic centres, multi-pool complexes, high-demand commercial pools.
    Dosing Capacity:Higher granulate throughput — confirm model-specific capacity during assessment.
    Key Characteristics:
    • Variable dosing configurations for larger pool volumes
    • Higher throughput dissolving assembly
    • Compatible with CPR Touch XL and Compact 3000 control signals
    • Engineered for continuous commercial duty

    Chemical & engineering factors

    Understanding commercialcalcium hypochlorite dosing.

    Commercial pool operators choose disinfection systems based on water volume, bather load, plant layout, chemical handling and water chemistry considerations. Here is a balanced evaluation of calcium hypochlorite in commercial facilities.

    High Available Chlorine

    Calcium hypochlorite typically provides 65–70% available chlorine in solid form, offering concentrated sanitising power with significantly less chemical bulk to transport than liquid hypochlorite.

    Storage Stability in Warm Climates

    In Queensland and Northern NSW temperatures, liquid sodium hypochlorite steadily degrades and loses strength. Dry calcium hypochlorite maintains its strength when stored dry in cool, well-ventilated areas.

    Chlorate & Chlorite Management

    Calcium hypochlorite is certified under European DIN 19634 for public pool water treatment, helping operators manage disinfection by-product thresholds compared to degraded liquid stocks.

    Calcium Hardness Considerations

    Calcium hypochlorite naturally contributes calcium to the pool water. Operators must monitor calcium hardness, total dissolved solids (TDS) and water balance (LSI) as part of routine backwash and dilution cycles.

    Complete In-Machine Dissolution

    The patented GRANUDOS dissolving cone dissolves the granulate completely using a high-velocity water swirl, preventing sludge buildup, pipe clogging or un-dissolved chemical settling in the pool.

    Chemical Storage & Safety

    As an oxidiser, calcium hypochlorite requires dedicated, dry, segregated chemical storage away from acids, hydrocarbons and organics per Australian dangerous goods storage standards.

    Integrated systems

    Complete commercial solutions:WDT controller + GRANUDOS feeder.

    Combine the measurement intelligence of WDT autocontrol stations with the reliable delivery of GRANUDOS calcium hypochlorite feeders for an integrated, high-precision commercial plant room.

    WDT CPR Compact 3000+GRANUDOS-FLEX-TOUCH
    Solution 01 · Compact Public Pool

    CPR Compact 3000 + GRANUDOS-FLEX-TOUCH

    A compact, robust combination for public and commercial pools where space is limited. The Compact 3000 regulates free chlorine and pH, triggering the GRANUDOS-FLEX-TOUCH feeder to deliver proportional doses directly from the drum.

    • Free chlorine, pH, redox & temperature regulation
    • Proportional dosing output with pH preference
    • Compact footprint for tight plant rooms
    • Complete granulate dissolution without pipe clogging
    Enquire About Solution 01
    WDT CPR Touch XL+GRANUDOS-VARIO-TOUCH
    Solution 02 · Advanced High-Demand Aquatic

    CPR Touch XL + GRANUDOS-VARIO-TOUCH

    High-capacity chemical dosing paired with a 7-inch colour touch graphic display, self-cleaning electrodes, Modbus TCP and browser-based remote visibility for municipal and resort complexes.

    • 7-inch colour touchscreen with intuitive interface
    • Modbus TCP connectivity and USB data logging export
    • Remote indication for tablet and smartphone browsers
    • High granulate throughput for heavy bather loads
    Enquire About Solution 02

    System suitability, motive water requirements, interface signal compatibility and dosing throughput must be verified during an Ultra Automation plant-room assessment.

    Facility applications

    Built for demandingcommercial water environments.

    Bathhouses & Wellness Centres

    Consistent disinfection for high-temperature, high-bather therapy pools where water balance and hygiene are critical.

    Hotels & Resorts

    Reliable automated treatment for guest pools, reducing manual handling and chemical exposure for hospitality staff.

    Aquatic Centres

    High-capacity dosing for multi-lane public facilities handling heavy seasonal bather loads.

    Holiday & Caravan Parks

    Durable, low-maintenance dosing for seasonal-use pools operated by facility managers.

    Strata & Body Corporate

    Automated chemistry control for shared residential pools where consistent operator access is limited.

    High-Demand Commercial Pools

    Precision dosing engineered for continuous-use public and commercial swimming pools.

    End-to-end technical support

    From specification toroutine plant-room maintenance.

    Chemical dosing equipment requires accurate hydraulics, proper injection geometry, regular inspection and skilled calibration to protect bather health and plant equipment.

    Plant-Room Assessment

    Site inspection of existing hydraulics, motive water, chemical storage and dosing points.

    System Specification

    Selection of appropriate WDT controller and GRANUDOS dosing capacity for the facility.

    Retrofit Installation

    Integration of dosing equipment with existing circulation, electrical and control systems.

    Commissioning

    Calibration of measuring cells, set-point tuning and validation of proportional control.

    Operator Training

    Handover of safe operation, chemical handling and routine maintenance procedures.

    Servicing & Fault Diagnosis

    Scheduled calibration, electrode replacement and troubleshooting of dosing faults.

    Commercial assessment

    Request a calcium hypochloritedosing assessment.

    Tell us about your facility, bather demand, existing chemical setup and upgrade objectives. Upload photos of your plant room or current dosing equipment for technical review.

    Upload clear photos of existing dosing board, measuring cell or site plans (JPG, PNG, WebP or PDF, up to 8 MB each).

    By submitting this form, you agree that Ultra Automation may contact you regarding this assessment. Equipment compatibility is subject to site review.

    Technical FAQ

    Frequently askeddosing questions.

    Can GRANUDOS dosing replace my existing liquid chlorine dosing?

    In many commercial facilities a GRANUDOS calcium hypochlorite system can be retrofitted, but compatibility depends on your existing controller outputs, motive water supply, chemical storage and injection point. A plant-room assessment confirms suitability.

    Is calcium hypochlorite better than liquid chlorine for commercial pools?

    Each has trade-offs. Calcium hypochlorite offers higher available chlorine and better storage stability in warm climates but increases calcium hardness and TDS. Liquid sodium hypochlorite is simpler to handle but degrades and adds salinity. Suitability depends on your water chemistry and facility.

    Does the GRANUDOS system require a separate controller?

    Yes. GRANUDOS dosing equipment is driven by a compatible WDT autocontrol instrument such as the CPR Compact 3000 or CPR Touch XL, which measures water chemistry and sends proportional dosing commands.

    What maintenance does a GRANUDOS system need?

    Routine maintenance includes electrode calibration, dissolving-cone inspection, checking dosing lines and motive water flow, and replenishing granulate stock. Ultra Automation offers scheduled servicing and fault diagnosis.

    Do you service GRANUDOS systems across Queensland and Northern NSW?

    Yes. Ultra Automation provides assessment, installation, commissioning and servicing across South East Queensland, the Gold Coast, Brisbane, the Sunshine Coast and Northern NSW.

    Where can I download the official WDT GRANUDOS brochure?

    You can access official manufacturer brochures directly from Werner Dosiertechnik: WDT GRANUDOS Product Page.

    Ready to discuss commercial chemical dosing?

    Start with a plant-room assessment to evaluate your water volume, bather demand and existing equipment. We will specify the most suitable WDT controller and GRANUDOS feeder configuration for your facility.

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