Standard pH4.01 + pH6.86 + PH9.18 Calibration Powder

Complete 3-Point pH Calibration Kit: Includes individual sachets for pH 4.01 (acidic), pH 6.86 (neutral), and pH 9.18 (alkaline) to enable full-range linear calibration.

Pre-Measured High-Precision Sachets: Sealed in individual moisture-proof foil packets to maintain chemical integrity and eliminate manual weighing errors.

Standard 250mL Solution Preparation: Each sachet dissolves cleanly into 250mL of distilled or deionized water to yield a precise reference buffer.

Temperature Compensation Reference Table: Features clear temperature-dependence values printed on each packet for precise calibration across varying thermal conditions.

NIST-Traceable Purity Standards: Formulated from high-purity chemical buffer compounds to guarantee reproducible, laboratory-grade calibration results.

Chemical Composition: High-purity buffer powders (potassium hydrogen phthalate, mixed phosphate, and sodium tetraborate) in individual foil packets.

Technical Specifications:

Buffer Standards Included: pH 4.01, pH 6.86, pH 9.18 ( ±0.01 pH @ 25°C).

Solution Yield: 3 x 250 mL (750 mL total calibration volume).

Form Factor: Dry powder sachets (Red, Green, and Blue labeled foil packets).

Usage Advice: Dissolve each sachet into separate clean 250mL volumetric flasks filled with distilled water, stir thoroughly, and perform sequential 3-point calibration on your pH meter.

Maintenance: Keep unopened sachets stored in a cool, dry location; store prepared buffer solutions in airtight, sealed containers away from direct sunlight and atmospheric exposure.

Essential Universal Calibration Bundle: Position as a mandatory accessory kit for digital pH pens, laboratory glass electrode probes, and automated pH controllers.

Highlight 3-Point Accuracy Span: Emphasize how a full 3-point calibration ensures high measurement linearity and eliminates zero-point drift across acidic, neutral, and alkaline liquids.

Recommended Cross-Sell Add-ons: Pair with PH 02 Digital LCD Meter Pen Tester range 0.00-14.00 with Powder, 0-14pH Electrode Probe Sensor BNC Connector, Liquid PH Regulator/Controller Board, and Analog pH Sensor / Meter Kit.

Featured Collection Star: Display prominently on your Water Quality Sensors collection page as your standard full-spectrum pH calibration kit.