Qiwei PH-220W for Food and Beverage pH Testing Malaysia
pH measurement is commonly used in food and beverage processing to monitor water quality, product consistency, cleaning processes and changes between production batches.
The Qiwei PH-220W External Electrode Portable pH Meter provides a convenient method for routine pH and temperature checks of suitable liquid samples, process water and cleaning water.
Its external wired electrode can be placed inside the sample container while the main display remains in the operator’s hand.
The Qiwei PH-220W is available from stock at MTM Precision Malaysia.
Why Is pH Important in Food and Beverage Processing?
pH can affect:
Product taste
Colour and appearance
Fermentation
Ingredient performance
Product consistency
Cleaning effectiveness
Microbial control
Storage stability
Quality-control decisions
A change in pH may indicate incorrect ingredients, process variation, contamination or inconsistent water quality.
The acceptable pH range depends on the product and production process. Operators should follow their approved product specification and quality-control procedure.
Where Can the Qiwei PH-220W Be Used?
The Qiwei PH-220W may be used for routine checking of suitable liquid samples such as:
Process water
Ingredient water
Rinse water
Cleaning water
Beverage samples
Juice samples
Liquid food ingredients
Fermentation samples
Sauce or liquid seasoning samples
Water-treatment samples
The electrode must be compatible with the sample. Thick, oily, high-protein or strongly contaminated samples may require a specialised food pH electrode and a different cleaning procedure.
Why Is the External Electrode Useful?
A conventional pH pen requires the complete sensor end of the instrument to be placed into the sample.
The Qiwei PH-220W uses an external wired electrode, allowing the operator to insert only the probe into the sample container.
This can be more convenient when:
The sample is inside a bottle or beaker
Multiple samples must be compared
The display must remain easy to read
The instrument body should be kept away from splashes
The sample container is narrow
The electrode needs to be cleaned separately
The main instrument should remain dry and should not be immersed in the sample.
Key Features
0.01 pH resolution
Measures pH and temperature
External wired pH electrode
Three-point pH calibration
Portable and lightweight design
Suitable for routine quality-control checks
Convenient for sample bottles and containers
Clear digital display
Available from stock in Malaysia
Main Technical Specifications
Model: Qiwei PH-220W
pH Measuring Range: 0.01 to 14.00 pH
pH Resolution: 0.01 pH
Temperature Range: 0 to 50°C
Temperature Resolution: 0.1°C
Calibration: Three-point pH calibration
Electrode Type: External wired pH electrode
Power Supply: Four 1.5V batteries
Dimensions: Approximately Ø40 × 185 mm
Weight: Approximately 88g
Specifications and supplied accessories may vary according to the latest production batch. Please confirm the current configuration with MTM Precision before ordering.
How to Measure a Liquid Food or Beverage Sample
Prepare a clean sample container.
Confirm that the sample is suitable for the electrode.
Check that the temperature is within the meter’s specified range.
Calibrate the meter using fresh pH buffer solutions.
Rinse the electrode with clean or distilled water.
Place the electrode into the sample.
Ensure that the sensing area is sufficiently immersed.
Move the electrode gently to remove trapped air bubbles.
Wait for the reading to stabilise.
Record the pH value, temperature, product and batch information.
Clean the electrode using the appropriate procedure.
Do not return a tested sample to the production batch.
Why Should Sample Temperature Be Recorded?
The pH value and electrode response can be affected by temperature.
When comparing different production batches, quality-control staff should try to measure samples under consistent conditions.
Recording the sample temperature helps determine whether a reading difference is caused by the product or by different measuring conditions.
Can the PH-220W Test Thick or Solid Food?
The PH-220W is primarily suitable for water and compatible liquid samples.
Thick, semi-solid or solid foods may require a specialised electrode designed for direct penetration or difficult samples.
Examples include:
Meat
Cheese
Dough
Thick sauce
Jam
Yoghurt
Semi-solid food
High-protein products
Customers should confirm the sample type before selecting a pH meter or electrode.
Why Is the pH Reading Slow or Unstable?
Possible causes include:
Product residue on the electrode
Oil or fat coating the sensor
Protein contamination
Dry electrode
Old calibration solution
Incorrect calibration
Sample temperature changes
Insufficient stabilisation time
Damaged or ageing electrode
Food and beverage samples may leave deposits that cannot be removed by rinsing with water alone.
Cleaning the Electrode After Food Testing
Correct cleaning depends on the type of sample.
After measurement:
Rinse the electrode immediately
Remove visible residue carefully
Use a suitable electrode-cleaning solution
Avoid aggressive wiping of the glass sensor
Do not use an incompatible solvent
Recondition the electrode if the response becomes slow
Store it in the correct pH-electrode storage solution
Recalibrate before important measurements
Separate cleaning procedures may be required for oil, fat, protein, sugar and mineral deposits.
How Often Should the PH-220W Be Calibrated?
Calibration frequency depends on:
Frequency of use
Required measurement accuracy
Type of sample
Condition of the electrode
Internal quality-control requirements
Difference between expected sample values
For routine production checks, many users calibrate before a testing session or according to their approved quality-control procedure.
Fresh buffer solutions should be used. Do not pour used buffer back into its original container.
Can It Be Used for Cleaning-Water Checks?
The Qiwei PH-220W can be used for routine checking of compatible cleaning-water and rinse-water samples.
A pH result may help operators identify whether:
Cleaning chemicals remain in the rinse water
Neutralisation is incomplete
The final rinse differs from the incoming water
The cleaning process requires further investigation
However, pH alone does not confirm that a surface or production line is hygienically clean.
Can PH-220W Results Be Used for Official Quality Documentation?
The PH-220W is suitable for routine operational checks and preliminary quality-control measurements.
Formal laboratory or regulatory work may require:
Approved test methods
Traceable calibration
Documented buffer verification
Temperature control
Suitable food-grade electrodes
Defined sample-preparation procedures
Laboratory-quality instruments
Users should follow their internal quality system and applicable Malaysian requirements.
Who Should Use the Qiwei PH-220W?
The Qiwei PH-220W is suitable for:
Beverage manufacturers
Food-processing factories
Commercial kitchens
Water bottling operations
Ingredient suppliers
Quality-control departments
Production supervisors
Water-treatment contractors
Training and educational laboratories
Qiwei PH-220W Available in Malaysia
The Qiwei PH-220W External Electrode Portable pH Meter is available from stock at MTM Precision Malaysia.
Contact our team to confirm whether the instrument and electrode are suitable for your particular liquid sample.
Contact MTM Precision
MTM Precision Sdn. Bhd. (744811-A)
Telephone: +603-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com / enquiry@mtmpre.com.my
Website: www.mtmpre.com.my
Showroom & Service Centre
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor,
Malaysia.
18 Sep 2026
