Product Description
pH Test Kit Keen, model RMR-0221, is a compact colorimetric test kit designed for checking the acidity or alkalinity of liquid and aqueous samples. The listed measurement range is pH 4.0 to 10.0, covering mildly acidic, neutral and alkaline conditions commonly encountered in routine water-quality and process checks.
The test uses a liquid reagent to produce a colour response in the prepared sample. The developed colour is then compared visually with the reference colour chart supplied with the kit. This approach allows users to perform quick pH screening without an electronic pH meter, calibration buffers or electrical power.
Each box is specified for approximately 400 tests when the reagent is used according to the manufacturer’s instructions. The actual number of completed tests can vary if excessive reagent is used, sample preparation is repeated, reagent is spilled or the bottle is not handled according to the supplied directions.
The RMR-0221 kit is suitable for routine screening and field checks where an approximate pH result is sufficient. For high-precision analysis, regulated reporting or applications requiring decimal-resolution data, a properly calibrated laboratory pH meter and validated test method may be more appropriate.
Key Features
- Measures the pH of aqueous samples over the listed pH 4.0 to 10.0 range
- Colorimetric reagent method with visual colour-chart comparison
- Specified capacity of up to 400 tests per box
- Compact and portable format for laboratory or field use
- Does not require electricity, electrodes or electronic calibration
- Suitable for quick routine screening of acidic, neutral and alkaline liquids
- Supplied with basic components required for the colour-comparison method
- Economical option for users performing frequent pH checks
- Made in Bangladesh under the Keen brand
- Suitable for trained users in educational, industrial, agricultural and water-testing environments
Product Overview
pH expresses how acidic or alkaline an aqueous solution is. A pH below 7 is generally acidic, pH 7 is neutral under standard reference conditions and a pH above 7 is generally alkaline. Many water, agricultural, aquarium, treatment and laboratory processes require pH to remain within a defined operating range.
In a colorimetric pH test, an indicator reagent changes colour according to the hydrogen-ion activity of the sample. The user compares the reacted sample with a colour scale and selects the closest matching pH value. Result quality depends on correct sample volume, correct reagent quantity, proper mixing, suitable lighting and careful comparison with the chart.
This kit is intended for aqueous samples. Direct testing of dry soil, powders, concentrated chemicals, oils, solvents or strongly coloured liquids may not provide a valid result. Such materials may require an approved extraction, dilution or alternative instrumental method before pH is assessed.
General Specifications
Product Name: pH Test Kit Keen
Model / Manufacturer SKU: RMR-0221
Brand: Keen
Country of Origin: Bangladesh
Product Form: Boxed liquid-reagent colorimetric test kit
Measurement Type: Colorimetric
Measured Parameter: pH of liquid or aqueous samples
Listed pH Range: pH 4.0 to 10.0
Number of Tests: Approximately 400 tests per box
Result Format: Visual comparison against a supplied colour card
Power Requirement: No electrical power required
Typical Package Contents: Reagent bottle, test tube, dropper, colour-comparison card and instructions
Exact Sample Volume: Follow the instruction guide supplied with the current box
Exact Reagent Quantity per Test: Follow the instruction guide supplied with the current box
Accuracy / Scale Increment: Contact Inaya Scientific for confirmation from the current product label
Storage Temperature: Contact Inaya Scientific for confirmation from the supplied label
Shelf Life: Use before the expiry date printed on the product or packaging
Certificate / Technical Document: Subject to manufacturer and batch availability
Intended Use: Routine water and aqueous-sample pH screening
Typical Package Contents
Common supplier listings for model RMR-0221 describe the following components. Buyers should verify the contents of the current sealed box before use:
- One bottle of pH indicator reagent solution
- One test tube or sample-comparison tube
- One dropper for sample-volume adjustment or reagent handling
- One pH colour-comparison card
- One instruction manual or testing guide
Packaging design and included accessories may be changed by the manufacturer. Contact Inaya Scientific for confirmation when a specific tube type, reagent volume or accessory is required.
Main Applications
Water-Quality Screening
Suitable for checking the approximate pH of drinking-water samples, source water, treated water, process water and other compatible aqueous samples. Regulatory or compliance decisions should be based on an approved method and suitable quality-control procedure.
Aquarium and Pond Water
Can support routine monitoring of freshwater aquarium or pond water when the expected pH falls within the kit range. The required pH depends on the aquatic species and system, so results should be assessed against an appropriate care or operating guideline.
Swimming Pool and Recreational Water
May be used for quick pH screening of compatible pool-water samples. Pool management also requires other parameters, such as disinfectant concentration and alkalinity, which are not measured by this single-parameter pH kit.
Agriculture and Hydroponics
Useful for checking irrigation water, nutrient solutions and prepared soil-water extracts. It should not be applied directly to dry soil unless an approved extraction procedure is followed.
Laboratory and Educational Work
Suitable for demonstrations, routine checks and supervised laboratory activities where a visual colorimetric result is acceptable. The kit is not a substitute for a calibrated pH meter when high precision, traceable measurement or continuous monitoring is required.
Industrial and Treatment Processes
Can support preliminary checking of compatible process-water or treatment samples. Strongly coloured, turbid, reactive or chemically aggressive samples may interfere with the indicator or make visual comparison unreliable.
Key Benefits
- Provides fast approximate pH screening without an electronic instrument
- Supports up to 400 routine tests from one box when used correctly
- Portable format is convenient for field and on-site checks
- Simple visual method can be learned without complex instrument operation
- No calibration buffers, electrodes, charging or power supply are required
- Useful for frequent monitoring where screening-level results are acceptable
- Broad pH 4.0 to 10.0 range covers many routine aqueous applications
- Small kit format is easy to store and transport
Who Should Buy This Product?
- Water-treatment plants and service providers
- Industrial quality-control and utility teams
- Educational laboratories and training centres
- Agricultural farms and hydroponic growers
- Aquarium, hatchery and pond operators
- Swimming-pool maintenance teams
- Research and development laboratories
- Field technicians and environmental sampling teams
- Food and beverage facilities requiring preliminary water checks
- Scientific-equipment dealers and institutional buyers
Basic Test Procedure
The following is a general colorimetric workflow only. The sample volume, number of reagent drops, reaction time and comparison procedure printed in the supplied Keen instructions must take priority.
- Confirm that the reagent, test tube and colour card are clean, undamaged and within the stated expiry period.
- Collect a representative liquid sample in a clean container.
- Rinse the test tube with a small amount of the sample when the supplied instructions require rinsing.
- Fill or adjust the sample to the exact mark or volume specified in the kit instructions.
- Add the specified quantity of reagent without touching the dropper tip to the sample or tube.
- Mix gently using the method stated by the manufacturer and allow the required colour-development time.
- Compare the reacted sample with the supplied colour card under bright, neutral lighting.
- Select the closest colour match and record the corresponding pH value, date, sample identity and operator.
- Rinse reusable components promptly with suitable clean water after completing the test.
Good Testing Practice
- Use clean sampling containers and avoid cross-contamination between samples.
- Follow the same sample volume and reagent quantity for every test.
- Hold the reagent bottle in the orientation described in the instructions to obtain consistent drops.
- Read results within the specified comparison time because colours can change during prolonged standing.
- Use neutral daylight or suitable white lighting; coloured light can affect visual interpretation.
- Place the colour card and sample against a clean background when this improves colour comparison.
- Repeat unexpected results with a fresh sample before making operational decisions.
- Periodically compare the kit result with a calibrated pH meter or reference sample when quality control is important.
- Record the reagent lot number, opening date and expiry date for routine laboratory traceability.
Factors That Can Affect the Result
- Incorrect sample volume or reagent quantity
- Expired, contaminated or improperly stored reagent
- Strong sample colour that masks the indicator colour
- Cloudiness, suspended solids or turbidity
- Poor lighting or a coloured background during comparison
- Reading the colour too early or too late
- Dirty or chemically contaminated test tubes and droppers
- Samples outside the pH 4.0 to 10.0 range
- Highly concentrated, reactive or non-aqueous samples
- Subjective differences in colour perception between users
Storage and Shelf-Life
Keep the kit in its original box in a clean, dry and well-ventilated location. Protect the reagent and colour card from direct sunlight, excessive heat, moisture, dust and chemical fumes. Keep the reagent bottle tightly closed and upright when not in use.
- Store according to the temperature stated on the current Keen label.
- Do not freeze or refrigerate unless the product label specifically instructs it.
- Keep away from food, beverages and animal feed.
- Do not transfer the reagent into an unlabelled container.
- Protect the colour card from water, stains, fading and prolonged sunlight.
- Do not use reagent that has changed appearance, leaked, become contaminated or passed its expiry date.
- Record the opening date where required by the laboratory procedure.
The exact storage range and opened-reagent stability were not confirmed from a manufacturer document. Contact Inaya Scientific for confirmation from the supplied box, label or technical document.
Safety and Handling
- Read the current label and instruction sheet before first use.
- Use the reagent only for its intended testing purpose.
- Do not ingest the reagent or use it on humans or animals.
- Avoid contact with eyes, skin and clothing.
- Wear suitable gloves and eye protection according to the workplace risk assessment.
- Do not pipette by mouth or touch the dropper tip with bare hands.
- Keep the kit away from children and untrained users.
- If exposure occurs, follow the first-aid information on the product label or safety document and obtain medical advice when required.
- Dispose of reacted samples and remaining reagent according to local regulations and the laboratory waste procedure.
Important Limitations
- The result is based on visual colour matching and is therefore approximate.
- The kit does not provide continuous monitoring or automatic data recording.
- Samples below pH 4.0 or above pH 10.0 cannot be quantified reliably with the listed scale.
- Strongly coloured or turbid samples may prevent accurate comparison.
- This kit measures pH only and does not determine alkalinity, hardness, chlorine, iron, dissolved oxygen or other water parameters.
- A pH result alone does not establish whether water is safe for drinking or suitable for a particular process.
- For legal, regulatory, medical, pharmaceutical or high-precision analysis, use a validated method and suitable calibrated equipment.
- The exact reagent composition, accuracy, resolution and interference data should be confirmed from the current manufacturer documentation.
pH Test Kit Keen Price in Bangladesh
The price of the Keen pH Test Kit RMR-0221 in Bangladesh may vary according to current stock, reagent expiry, packaging revision, import or distribution cost, order quantity and delivery location.
Contact Inaya Scientific for the latest price, current box image, expiry information, available quantity and institutional or bulk quotation.
Availability and Delivery in Bangladesh
The Keen RMR-0221 pH Test Kit is available through Inaya Scientific subject to current stock and batch availability. Customers should confirm the pH 4.0 to 10.0 range, 400-test claim, kit contents, expiry date and sealed packaging before placing an order.
Nationwide delivery is available across Bangladesh.
Why Choose Inaya Scientific?
Inaya Scientific supplies water-testing kits, laboratory chemicals, scientific instruments, textile-testing products and laboratory accessories to educational, research, industrial and quality-control customers throughout Bangladesh.
Customers can contact Inaya Scientific to confirm:
- Current stock and batch availability
- Model RMR-0221 confirmation
- pH 4.0 to 10.0 range shown on the supplied box
- Reagent expiry date and sealed packaging
- Actual accessories included in the current kit
- Manufacturer instructions and safety information
- Current price and bulk-order quotation
- Delivery time and nationwide shipping arrangement
Frequently Asked Questions
What is the Keen pH Test Kit RMR-0221?
It is a liquid-reagent colorimetric kit used to estimate the pH of compatible aqueous samples by comparing a developed colour with a supplied reference chart.
What pH range does the kit measure?
Common supplier specifications list a measurement range of pH 4.0 to 10.0. Confirm the scale printed on the current colour card before testing.
How many tests can one box perform?
The box is specified for approximately 400 tests. The actual number depends on using the prescribed sample volume and reagent quantity without waste or repeated testing.
Is this an electronic pH meter?
No. It is a colorimetric reagent test kit and does not use an electrode, display, battery or calibration buffer.
What is included in the kit?
Common listings describe a reagent bottle, test tube, dropper, colour-comparison card and instruction guide. Verify the current sealed-box contents before purchase.
Can it be used for drinking-water testing?
It can provide an approximate pH screening result for a compatible water sample. A pH result alone does not confirm drinking-water safety, because microbiological and other chemical parameters must also be assessed.
Can it be used for soil testing?
It may be used on a properly prepared soil-water extract when an approved extraction procedure is followed. It should not be applied directly to dry soil.
Can it be used for aquariums or ponds?
Yes, it may be used for approximate pH checks when the expected value is within pH 4.0 to 10.0. The target range depends on the fish, plants and system.
How many drops of reagent are required?
The exact drop count was not confirmed from a manufacturer instruction sheet. Use only the quantity stated in the guide supplied with the current kit.
How accurate is the result?
The manufacturer accuracy and scale increment were not confirmed from an authoritative technical document. Colorimetric results are generally approximate and depend on correct technique and colour comparison.
Can coloured water be tested?
Strong sample colour can mask the indicator colour and make comparison unreliable. A different validated method or a suitable pH meter may be needed.
How should the reagent be stored?
Keep it tightly closed, upright and protected from heat, sunlight and contamination. Follow the exact storage condition printed on the supplied label.
Can the kit replace a laboratory pH meter?
It is useful for quick screening but may not replace a calibrated meter when decimal resolution, traceability or high-precision reporting is required.
Is the kit made in Bangladesh?
The provided product information identifies Keen as the brand and Bangladesh as the country of origin.
Is nationwide delivery available?
Yes. Inaya Scientific provides nationwide delivery across Bangladesh, subject to current stock and courier arrangements.
Closing Recommendation
The Keen pH Test Kit RMR-0221 is a practical option for users who need frequent, quick and portable pH screening of compatible aqueous samples within the listed pH 4.0 to 10.0 range. Its colorimetric method, compact box and approximately 400-test capacity make it suitable for routine water, aquarium, agricultural, educational and general laboratory checks.
For dependable results, users should verify the sealed kit and expiry date, follow the exact supplied sample volume and reagent instructions, use clean testing components, compare colours under suitable lighting and repeat unusual results. High-precision, regulated or traceable measurements should be confirmed using an appropriate calibrated instrument and validated method.
Order From Inaya Scientific
Seller: Inaya Scientific
Product: pH Test Kit Keen
Model: RMR-0221
Brand: Keen
Country of Origin: Bangladesh
Measurement Range: pH 4.0 to 10.0
Number of Tests: Approximately 400 tests per box
Mobile: +880 1778-492798
WhatsApp: 01620-247815
Email: inayascientific@gmail.com
Website: www.inayascientific.com
Delivery: Nationwide delivery across Bangladesh
When requesting a quotation, mention the product name, model RMR-0221, required quantity, delivery address and contact number.
