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pH Meter Calibration Solution 4.00 7.00 10.01 & ORP 222mV – 50mL
pH Meter Calibration Solution 4.00 7.00 10.01 & ORP 222mV – 50mL
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HELTC 50mL pH & ORP Calibration Buffer Solution
Keep your pH meter and ORP tester reading with precision using this HELTC 50mL Standard Calibration Solution. Available in pH 4.00, 7.00, and 10.01 buffer values, as well as 222mV for ORP calibration, this solution ensures your instruments stay accurate and reliable — whether you're testing water quality, aquariums, hydroponics, pools, or laboratory samples.
Why Calibrate Regularly?
pH electrodes drift over time. Regular calibration with a certified buffer solution is essential to maintaining measurement accuracy. This compact 50mL bottle is perfect for single-point or multi-point calibration routines, giving you confidence in every reading.
Key Features
- Precise Buffer Values: Available in pH 4.00, 7.00, 10.01, and ORP 222mV — covering acidic, neutral, and alkaline ranges
- Universal Compatibility: Works with most standard pH meters and ORP testers on the market
- Compact & Convenient: 50mL bottle (approx. 6.6 × 4 × 4 cm / 2.59 × 1.57 × 1.57 in) — easy to store and use
- High Quality Formula: Consistent, stable buffer solution for dependable calibration results every time
- No Battery Required: Ready to use straight from the bottle
Specifications
- Brand: HELTC
- Volume: 50mL per bottle
- Dimensions: 6.6 × 4 × 4 cm / 2.59 × 1.57 × 1.57 in
- Available Buffer Values: pH 4.00, pH 7.00, pH 10.01, ORP 222mV
- Battery Included: No
- Made in Mainland China
What's in the Box
- 1 × 50mL pH / ORP Calibration Buffer Solution (selected value)
Perfect For
- Aquarium & fish tank water testing
- Hydroponics & gardening pH management
- Swimming pool & spa water monitoring
- Home & laboratory water quality testing
- Food & beverage quality checks
For more on accurate water quality measurement standards, visit the U.S. Environmental Protection Agency – Water Quality Data.
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Note: Due to manual measurement, slight dimensional variance (±5–10mm) may occur. Colors may vary slightly depending on monitor settings, lighting, and display calibration.
Frequently Asked Questions
Q: What pH buffer values does this calibration solution come in?
A: This HELTC calibration solution is available in pH 4.00 (acidic), pH 7.00 (neutral), pH 10.01 (alkaline), and ORP 222mV, allowing you to perform single-point or multi-point calibration on most standard pH meters and ORP testers.
Q: How often should I calibrate my pH meter with this solution?
A: For best accuracy, it is recommended to calibrate your pH meter before each use or at least once a week if used regularly. Frequent calibration ensures your readings remain precise, especially in critical applications such as aquariums, hydroponics, or water quality testing.
Q: Is this calibration solution compatible with my pH meter?
A: Yes — this is a standard buffer solution compatible with the vast majority of pH meters and ORP testers available on the market. Simply check that your meter supports the buffer value (4.00, 7.00, or 10.01) you select, and follow your meter's calibration instructions.
Q: How much solution is included and how long will it last?
A: Each bottle contains 50mL of buffer solution. For typical home or hobbyist use — such as aquarium or hydroponics monitoring — a 50mL bottle can last through many calibration sessions, as only a small amount is needed each time.
