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pH 7.00 Calibration Solution — Atlas Scientific

The Atlas Scientific pH 7.00 Calibration Solution is a precision reference liquid used to calibrate pH sensors and EZO™ pH circuits. Accurate calibration is the foundation of reliable pH measurement — without it, your sensor readings will drift and become untrustworthy over time.

This solution is manufactured to strict NIST-traceable standards, ensuring the pH value is accurate and consistent from bottle to bottle. It's essential for anyone doing serious water quality monitoring, hydroponics, aquaculture, aquarium management, or environmental sensing.

Calibration tip: For best accuracy, perform a 3-point calibration using all three solutions: pH 4.00 (acid), pH 7.00 (neutral), and pH 10.00 (base). A 2-point calibration (pH 4 + pH 7, or pH 7 + pH 10) is acceptable for narrower measurement ranges.

Why calibration matters

  • Sensor drift: pH probes naturally drift over days and weeks — regular calibration corrects this
  • Temperature effects: pH readings shift with temperature; calibration at your working temperature improves accuracy
  • Probe aging: As probes age, their response curve changes — calibration compensates
  • Trusted data: Uncalibrated sensors can be off by 0.5–2.0 pH units, which is significant in most applications

pH calibration point guide

Solution pH Value Type When to use
pH 4.00 4.00 Acidic Calibrating for acidic measurements (pools, fermentation, soil)
pH 7.00 7.00 Neutral Always use — the baseline midpoint for all calibrations
pH 10.00 10.00 Basic/Alkaline Calibrating for alkaline measurements (aquariums, wastewater)

Compatible Atlas Scientific products

Designed for use with Atlas Scientific pH probes and the EZO™ pH Circuit. Also works with any standard pH sensor or meter that requires buffer solution calibration.

What you can monitor

Hydroponics nutrient solutions, aquarium and reef tank water, swimming pool chemistry, drinking water quality, wastewater treatment, soil pH, fermentation processes, and laboratory experiments.

Technical specifications

Product Atlas Scientific pH 7.00 Calibration Solution
pH Value 7.00 (±0.01 at 25°C)
Type Neutral buffer
Traceability NIST-traceable
Format Liquid solution (bottle)
Shelf life Use within expiry date printed on bottle; store sealed at room temperature

Storage & handling

Keep bottles sealed and stored at room temperature away from direct sunlight. Do not pour used solution back into the bottle — always use a clean sample to avoid contamination. Discard solution after use.

Frequently Asked Questions

How often should I calibrate my pH sensor? For critical applications, calibrate weekly. For general monitoring, monthly calibration is usually sufficient. Always recalibrate after replacing a probe or if readings seem inconsistent.
Do I need all three solutions? A 2-point calibration (pH 7 + one other) is fine for most uses. 3-point calibration provides the best accuracy across the full pH range. Always include pH 7.00 as your midpoint.
Can I use this with non-Atlas Scientific sensors? Yes. Standard pH buffer solutions work with any pH probe or meter that requires calibration.
Does temperature affect calibration? Yes. Calibrate at the same temperature you'll be measuring at for best accuracy. Most EZO circuits include automatic temperature compensation when paired with a temperature sensor.

pH 7.00 Calibration Solution Liquid - Neutral Buffer

pH 7.00 Calibration Solution Liquid - Neutral Buffer

Out of stock

Product Code

CHEM-pH-7

₱ 780.00
₱ 780.00
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