Floor Scrubber Detergent Dilution: Mixing and Dispenser Calibration

Correct floor scrubber detergent dilution starts with the selected cleaner’s label: confirm what the ratio means, measure the actual batch volume, and verify that the dispensing system delivers the approved dose. A setting marked “1:100” is not enough unless the instructions define whether it means concentrate to water or concentrate to finished solution.

Keep product selection and dosing verification connected. The cleaner must suit the floor, its finish, and the machine at the intended working concentration. An accurately measured mixture is still unsuitable if the chemistry or application method is wrong. KINGHOME’s commercial tile cleaner guidance connects dilution with tile, grout, machine compatibility, and rinsing requirements.

Understand What “1:100” Means Before Mixing

A ratio needs a stated basis. When instructions use equal volume units, these two definitions produce different mixtures:

Stated definition	What it means	Example
1 part concentrate to 100 parts water	Add concentrate to 100 equal parts of water	100 mL concentrate plus 10 L water produces approximately 10.1 L of solution
1 part concentrate in 100 parts finished solution	Concentrate is one part of the final 100-part volume	Measure 100 mL concentrate and add water to a final volume of 10 L

Under the first definition, concentrate represents approximately 0.9901% of the finished volume. Under the second, it represents 1%. These percentages describe the volume of the supplied product in the mixture—not its active-ingredient concentration.

The difference becomes more significant with stronger mixtures. Do not infer the convention from a ratio alone, and do not assume a dispenser display uses the same convention as the chemical label. Hydro Systems’ HydroMinder 5111 instructions, for example, explicitly express their calculated ratio as water to concentrate, which reverses the order commonly used in product-to-water instructions.

If the label, technical data sheet, and dosing chart do not clearly agree, ask the supplier to confirm the intended dose in mL per litre of water or mL per litre of finished solution before preparing the batch.

Calculate the Dose from the Actual Fill Volume

Separate Tank Capacity from Batch Volume

A nominal tank capacity is not a measurement of the water currently inside it. Record whether the operating recipe requires:

• A measured quantity of water, followed by concentrate.
• A specified final volume of mixed solution.
• Clean water in the main tank, with concentrate supplied separately through an approved on-board dosing system.

These arrangements are not interchangeable. Kärcher’s BD 35/15 C Classic Bp instructions describe detergent dosing by the amount added to the tank. Its B 60 W Bp instructions distinguish models without dosing equipment from the optional DOSE arrangement, which adds detergent on the way to the cleaning head. Follow the manual applicable to the exact machine and configuration.

For equipment comparisons, use KINGHOME’s floor scrubber buying guide alongside the manufacturer’s instructions to assess filling, chemical approval, and operator controls.

Worked Examples: A Part-Filled Tank

The following examples are arithmetic illustrations, not recommended dilutions for any KINGHOME product. Assume an empty, drained tank with a nominal capacity of 50 L, an approved batch size below its permitted fill limit, and volume-based mixing instructions.

Hypothetical instruction	Batch requirement	Concentrate required	Water or final volume
1:100 concentrate to water	Start with 40 L of measured water	400 mL	Approximately 40.4 L finished solution
1:100 concentrate to water	Prepare 40 L of finished solution	Approximately 396 mL	Add water to reach 40 L final volume
1:100 concentrate to finished solution	Prepare 40 L of finished solution	400 mL	Add water to reach 40 L final volume

For a concentrate-to-water ratio of (1:x):

[ \text{Concentrate, mL}=\frac{\text{Water, L}\times1{,}000}{x} ]

For a specified final batch volume at the same concentrate-to-water ratio:

[ \text{Concentrate, mL}=\frac{\text{Final solution, L}\times1{,}000}{x+1} ]

If the instructions instead define (1:x) as concentrate to finished solution:

[ \text{Concentrate, mL}=\frac{\text{Final solution, L}\times1{,}000}{x} ]

Use these equations only after confirming the ratio definition and measurement basis. Follow any product-specific mixing or final-volume procedure rather than assuming that all mixtures behave identically.

Do not calculate a full-tank dose and add it to a partly filled tank. If the quantity or concentration of an existing mixture is unknown, do not guess a corrective top-up; obtain the supplier’s correction procedure or replace the mixture using the approved draining and disposal process.

Prepare a Measured Manual Batch

Before handling concentrate, read the product label and safety data sheet for protective equipment, ventilation, splash precautions, and spill response. The SDS supports handling decisions; it does not establish cleaning performance or replace the product’s application instructions.

1. Confirm the approved recipe. Match the exact product, floor zone, soil task, machine, and dilution definition.
2. Check the measuring equipment. Use a chemically compatible graduated vessel with markings suitable for the required dose. An unmarked cap or estimated splash is not a measurement.
3. Confirm the batch volume. Use a measured water quantity or a verified final-volume mark, as required by the recipe.
4. Follow the specified filling sequence. Use the order and water temperature permitted by both the cleaner instructions and machine manual. Do not impose a universal requirement to premix externally or pour concentrate directly into the tank.
5. Prevent double dosing. If a dispenser has already supplied working solution, do not add another manual dose.
6. Record the preparation. Identify the product, ratio basis, water or final volume, concentrate quantity, date, operator, and machine or batch ID.

Verify measuring vessels against a suitable reference measure before relying on improvised markings. Replace vessels with damaged or unreadable graduations, and keep them dedicated or clean them using the chemical supplier’s approved method.

Verify Pump Output and Automatic Dilution

Calibration means comparing actual delivery with the required delivery and making only the adjustments permitted by the equipment manufacturer. Selecting a dial position or fitting a coloured tip does not, by itself, verify the resulting mixture.

Manual Dosing Pumps

For a container-mounted pump that is intended to deliver a fixed quantity per stroke:

1. Check that the pump is approved for the product and container.
2. Prime it according to its instructions before measuring output.
3. Where the manufacturer permits a collection test, dispense several complete strokes into a suitable graduated vessel.
4. Divide the collected volume by the number of strokes.
5. Repeat as required by the pump instructions to check consistency, then record the verified output.

For example, if a hypothetical test collects 246 mL from 10 complete strokes, the measured average is 24.6 mL per stroke. That is a test result, not proof that every later stroke will deliver exactly the same amount.

Use the verified output to establish the approved stroke count. If the required dose cannot be measured reliably in whole strokes, use an approved measuring method for the remaining quantity rather than estimating a partial stroke. Investigate inconsistent output before returning the pump to use.

Water-Powered Proportioners

Use the installed proportioner’s own verification procedure. Hydro Systems’ HydroMinder 5111 instruction sheet, Rev. B, September 2010, explains that metering-tip charts are approximate because factors including product viscosity, inlet water pressure, and temperature affect dilution. Its procedure measures both the mixed solution dispensed and the concentrate drawn after priming. These instructions apply to that model, not automatically to every dispenser.

Where the equipment manufacturer permits this type of draw test, use the same volume units for both measurements:

[ \text{Water-to-concentrate ratio}= \frac{\text{Mixed solution collected}-\text{Concentrate drawn}} {\text{Concentrate drawn}} ]

In a hypothetical test, collecting 10.1 L of mixture while drawing 0.100 L of concentrate gives:

[ \frac{10.1-0.100}{0.100}=100 ]

The result is 100 parts water to 1 part concentrate, equivalent to 1:100 concentrate to water—not 1:100 concentrate to finished solution.

Collect and handle test liquids only through the manufacturer’s approved procedure. Compare the result with the required product dilution and the applicable equipment or supplier acceptance limits; do not invent a universal percentage tolerance.

Closed-Cartridge and On-Board Systems

Not every dosing system permits tip changes or access to concentrate. Diversey’s J-Fill system, for example, uses in-cartridge metering. Do not remove, drill, or substitute a cartridge component to force a different dilution. Use the approved cartridge and the supplier’s verification or service procedure.

For on-board injection systems:

• Confirm what the displayed ratio or percentage represents.
• Check the approved chemical and concentration range.
• Use the manufacturer’s priming and verification procedure.
• Verify delivery at the operating conditions required by that procedure.
• Refer restricted adjustments and faults to authorised service personnel.

A sample from the main tank may not represent the delivered detergent concentration when injection occurs downstream. Kärcher’s B 60 W Bp DOSE arrangement is one example of detergent being added between the fresh-water tank and cleaning head.

Use Only Product-Appropriate Concentration Tests

A draw test verifies delivery volumes. Testing the concentration of the resulting solution is a separate task.

Use titration, test strips, conductivity, refractometry, or another analytical method only when the chemical supplier confirms that it is suitable for the exact product and working range. Obtain the sampling location, procedure, calibration requirements, and acceptance limits with the method.

Do not treat colour, fragrance, foam height, or a generic pH reading as proof of correct dilution. A pH result is not a universal measure of detergent concentration or floor compatibility. KINGHOME’s stone cleaning and chemical compatibility guidance makes this distinction when discussing solution checks and material selection.

If no validated solution-concentration test is available, document the approved volumetric verification method and its limitations rather than claiming an analytical result.

Keep Approved Recipes for Different Cleaning Tasks

Maintain a controlled recipe record instead of allowing operators to increase concentration whenever cleaning becomes difficult.

Task	What the approved recipe should specify	What to check before changing concentration
Routine maintenance	Exact product, labelled machine-use dilution, floor zone, batch calculation, and rinse requirements	Measuring accuracy, loose-soil removal, brush condition, and recovery
Heavier compatible soil	Product-approved heavier-duty dilution and application method	Soil identification, surface compatibility, permitted contact time, and agitation
Localised pretreatment	Whether separate application is permitted and how residues must be recovered	Whether the pretreatment is also approved for the machine’s wetted components
Rinse pass, where required	Water requirements, machine settings, and recovery procedure	Residual detergent, soil redeposition, and pickup performance

Each approved recipe should identify the supporting label or technical instructions and their revision where available. Include the ratio definition, actual batch volume, dose, dosing setting or verified pump output, brush or pad, permitted contact time, rinse requirement, and approval record.

Do not copy a tile-degreasing recipe onto polished marble, engineered stone, terrazzo, or coated concrete without separate compatibility confirmation. The complete floor assembly—including grout, resins, sealers, and coatings—matters, not just the exposed tile or stone. Validate the approved method on a representative small area and inspect it after drying before wider use.

Do Not Use Extra Detergent to Compensate for Machine Faults

When cleaning deteriorates, check the dosing result and the machine before changing the recipe:

• Poor soil removal: inspect brush or pad suitability, wear, contact, solution delivery, and the permitted cleaning procedure.
• Wet trails or poor pickup: inspect squeegee condition and adjustment, hoses, filters, tank seals, and recovery-tank level.
• Unexpected foam or residue: check product identity, dose, previous-product contamination, and the specified rinse procedure.
• Dull patches that remain after cleaning: distinguish residue from etching, scratches, worn polish, or coating damage.

Kärcher’s B 60 W Bp troubleshooting instructions separately address insufficient water, detergent delivery, brush wear, and vacuum performance. Increasing detergent concentration does not correct those mechanical faults.

Control Product Changes, Flushing, and Batch Identification

Changing detergent requires more than replacing the container. Residual product can remain in the tank, pickup tube, pump, or delivery line.

1. Identify the old and new products. Check the chemical suppliers’ handling requirements and the machine or dispenser changeover instructions.
2. Stop dosing and isolate equipment as instructed. Do not disconnect or service components while the system remains in an unsafe operating state.
3. Drain and dispose of remaining liquid through the approved route. Do not return working solution or collected test liquid to the concentrate container.
4. Clean or flush the affected circuit using the specified method. Do not invent a flush volume, duration, or neutralising chemical. Where the approved procedure is unclear, obtain supplier instructions before proceeding.
5. Fit the correct product and approved metering components. Do not transfer an old tip setting to a new formulation without verification.
6. Prime and verify delivery again. Record the product change and the verification result before releasing the equipment.
7. Identify the new batch or setup. Update the machine record and label any secondary container as required by applicable workplace rules.

Keep the preparation record linked to the product name and code, source-container lot where available, recipe revision, preparation date and time, operator, machine or dispenser ID, and any supplier-specified working-solution use period. Do not assign a universal shelf life to diluted detergent.

Dosing Verification Checklist

Check	Record or acceptance basis
Correct product and current instructions	Product name/code and applicable label or technical document
Floor and machine compatibility	Approved application and representative test-area result
Ratio definition	Concentrate to water, concentrate to final solution, or explicitly defined percentage
Actual batch quantity	Measured water volume or specified final volume—not nominal tank capacity alone
Manual dose or pump delivery	Concentrate quantity and verified mL per stroke, where applicable
Automatic dispenser	Correct cartridge/tip/setting and manufacturer-approved delivery check
Concentration test, if used	Product-approved method, result, and supplier acceptance limits
Changeover completed	Required draining, cleaning, flushing, and priming recorded
Final operating check	Cleaning, recovery, residue, and dry-surface appearance
Release record	Date, operator, machine/batch ID, and required approval

Set routine verification intervals from the chemical supplier’s instructions, equipment manual, and site quality plan. Include checks after product changes, metering-component replacement, servicing, and unexplained changes in consumption or cleaning results.

Request Product-Specific Dosing Support

For a KINGHOME detergent or equipment enquiry, provide the exact cleaner name, label and technical data sheet, machine model and dosing option, floor material and finish, soil task, water source, intended batch size, and current verification results. Use the KINGHOME enquiry form to request product documentation and confirmation of the applicable dilution and dosing method before issuing the site recipe.