Digital pH Meter (PH-02) — Apex Labs
Product Summary
The Apex Labs Digital pH Meter (PH-02) is a compact digital water quality testing instrument designed for convenient and rapid measurement of pH. With a 0.00–14.00 pH measuring range, 0.01 pH resolution and automatic two-point calibration, this portable meter is suitable for routine water testing and laboratory applications.
Its pocket-sized design and easy-to-read digital display make it suitable for testing drinking water, swimming pools, spas, aquariums, RO systems, hydroponic solutions and educational laboratory samples. The digital readout eliminates the need to interpret colour charts or pH test strips when a numerical measurement is required.

*Image for illustration purposes only.
Bulk Procurement & GeM Supply
Apex Labs supplies digital pH meters and water quality testing instruments for laboratories, educational institutions, water treatment applications, agricultural facilities and commercial requirements. GST-compliant invoicing and applicable institutional, tender and Government e-Marketplace (GeM) procurement support are available based on order requirements.
Technical Specifications
| Brand & Supplier | Apex Labs, Varanasi, Uttar Pradesh |
| Model Number | PH-02 |
| Measuring Range | 0.00 to 14.00 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.01 pH |
| Temperature Compensation | 0°C to 80°C |
| Operating Temperature | 0°C to 80°C |
| Calibration | 2-point automatic push-button calibration |
| Housing Material | Durable ABS construction |
| Housing Colour | Black + Yellow |
| Power Supply | 1.5V × 2 batteries |
Key Features
- Digital pH Measurement:
Provides numerical pH readings without requiring colour comparison charts or conventional pH strips. - Wide Measuring Range:
Measures from 0.00 to 14.00 pH for a broad range of water and laboratory testing applications. - 0.01 pH Resolution:
Displays pH measurements with a resolution of 0.01 pH. - Two-Point Calibration:
Supports automatic push-button two-point calibration for routine measurement setup. - Portable Design:
Compact pocket-style construction makes the meter convenient for field testing and routine laboratory use. - Durable ABS Housing:
The black-and-yellow ABS housing provides a practical design for regular handling and testing.
Operation Instructions
- Remove the protective cap from the electrode.
- Rinse the electrode thoroughly with distilled water and gently dry it using filter paper.
- Turn on the pH meter using the ON/OFF button.
- Immerse the electrode into the test solution up to the specified immersion line. Do not submerge the meter beyond the recommended level.
- Stir the solution gently and allow approximately 30 seconds for the reading to stabilize.
- Record the displayed pH value.
- After testing, rinse the electrode with pure/distilled water, switch off the meter and replace the protective cap.
Calibration Instructions
- Turn on the pH meter and dissolve each supplied buffer powder packet in 250 mL of distilled water.
- Immerse the electrode in the pH 6.86 buffer solution at 25°C.
- Press the CAL button for approximately 5 seconds and release it. Wait until the display stops flashing 6.86.
- Rinse the electrode with distilled water and gently dry it with filter paper.
- Immerse the electrode in the pH 4.00 buffer solution. Press CAL for approximately 5 seconds, then press and release the button again as required by the calibration procedure.
- Wait until the display stops flashing 4.00.
- Rinse and dry the electrode before testing.
- For test solutions above pH 7.0, calibration may be performed using the 6.86 and 9.18 buffer solutions following the applicable calibration procedure.
Applications
- Water Quality Testing:
Testing of drinking water, swimming pools, spas, aquariums and reverse osmosis (RO) systems. - Agriculture & Hydroponics:
Monitoring pH in suitable nutrient solutions and hydroponic growing environments. - Water Treatment:
Routine pH monitoring in water treatment and related process applications. - Educational Laboratories:
Suitable for school, college and training laboratory demonstrations involving pH measurement. - Laboratory Research:
General-purpose pH testing for suitable aqueous samples and routine laboratory procedures. - Commercial Applications:
Convenient portable testing for suitable water quality monitoring requirements.
Package Inclusions
- 1 × Digital pH Meter (PH-02)
- 2 × Calibration Buffer Powders
- 1 × Instruction Manual
- 1 × Protective Retail Storage Box
Calibration & Measurement Quality
For reliable pH measurements, the electrode should be properly rinsed between samples and the instrument should be calibrated using suitable buffer solutions according to the supplied instructions. Regular calibration is recommended when measurement accuracy is important or when the meter is used frequently.
Warranty
Warranty and after-sales support are provided according to the applicable product supply terms. For institutional, laboratory or bulk purchases requiring specific warranty documentation, please contact Apex Labs before placing the order.
Shipping / GST / GeM Information
- GST Invoice:
GST-compliant invoices can be provided for eligible business and institutional purchases. - Bulk Orders:
Quantity-based pricing may be available for laboratories, institutions, educational organizations and commercial requirements. - GeM & Tender Requirements:
Apex Labs supports applicable Government, institutional and tender procurement requirements. Product listing and availability should be confirmed for the specific requirement. - Delivery Across India:
Dispatch and delivery timelines depend on stock availability, destination and order quantity.
Frequently Asked Questions
What is the measuring range of the PH-02 pH meter?
The Digital pH Meter (PH-02) has a measuring range of 0.00 to 14.00 pH.
What is the resolution of this digital pH meter?
The meter provides a 0.01 pH resolution.
What is the accuracy of the PH-02?
The stated accuracy is ±0.01 pH.
Does the pH meter support automatic calibration?
Yes. The PH-02 supports two-point automatic push-button calibration using suitable buffer solutions.
Where can this pH meter be used?
It is suitable for applications including drinking water, swimming pools, spas, aquariums, RO systems, hydroponics, water treatment and educational laboratory testing.
Is the PH-02 suitable for field testing?
Yes. Its compact pocket-style design makes it convenient for portable and on-site pH testing.
What batteries does the meter use?
The PH-02 uses 2 × 1.5V batteries.
Can Apex Labs supply pH meters in bulk?
Yes. Apex Labs can handle bulk and institutional requirements. Contact us for quantity-based pricing, availability and procurement requirements.
Related Products
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- Digital Conductivity Meter
- Digital Multiparameter pH Meter
- pH Test Paper
- pH Buffer Solutions
- Water Quality Testing Kits
- Laboratory Water Testing Instruments
Related Category
Need Digital pH Meters for Your Laboratory?
Get pricing and availability from Apex Labs for individual, bulk and institutional requirements. GST invoicing and applicable procurement support are available.






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