pH 4.00 Calibration Solution Atlas Scientific 25 Pouches NIST

Description

Product Overview

The Atlas Scientific pH 4.00 Calibration Solution is a premium electrolyte standard designed for precise pH measurement across a wide range of laboratory applications. Each box contains 25 individually sealed pouches, each delivering 20 ml of solution that is calibrated to ±0.02 pH at 25 °C. The solution is standardized against NIST‑certified reference materials, ensuring traceability and consistency for critical analytical work. Its compact pouch format provides convenient, single‑use dosing that eliminates cross‑contamination and reduces waste. The product dimensions of 8 × 6 × 4 inches and a lightweight 1.26 lb package make storage and handling straightforward, while the two‑year shelf life at room temperature guarantees long‑term reliability.

Usage

This calibration solution is suitable for a variety of environments, including academic research labs, industrial quality‑control facilities, environmental monitoring stations, and field‑based water testing operations. It works seamlessly with any pH probe, whether glass electrode, ISFET, or solid‑state sensor, making it a versatile choice for both routine calibration and validation procedures. Users simply open a pouch, dispense the required volume into a clean container, and immerse the probe for a quick stabilization period. The solution’s stability and low temperature coefficient allow accurate readings even in fluctuating ambient conditions, supporting reliable data collection for processes such as fermentation monitoring, wastewater analysis, and pharmaceutical formulation.

Why Choose Us

Choosing Atlas Scientific means selecting a brand with a proven track record in delivering high‑quality scientific instrumentation and consumables. Our pH 4.00 Calibration Solution is produced under strict quality‑assurance protocols, with each batch tested against NIST‑certified references to confirm accuracy. The sealed pouch design protects the solution from exposure to air and contaminants, preserving its integrity over the full two‑year shelf life. Additionally, our dedicated technical support team is available to assist with probe compatibility questions, calibration procedures, and troubleshooting, ensuring that you receive comprehensive after‑sales service. With a customer rating of 4.3 stars from 17 reviews, the product has demonstrated consistent performance and satisfaction among laboratory professionals.

Key Features

• Precision‑tested to ±0.02 pH at 25 °C for reliable calibration results
• Standardized against NIST‑certified references, ensuring traceability
• Convenient 20 ml sealed pouches eliminate contamination and simplify dosing
• Compatible with all types of pH probes, supporting diverse laboratory needs
• Includes responsive customer support and technical assistance for seamless integration

FAQ

How should the pH 4.00 solution be stored?

Store the sealed pouches in a cool, dry place away from direct sunlight. The solution remains stable for up to two years at room temperature when kept in its original packaging.

Can this calibration solution be used with handheld pH meters?

Yes, the solution is fully compatible with handheld pH meters, bench‑top meters, and any other pH probe‑based devices. Simply dispense the required volume into a clean container and immerse the probe according to the manufacturer’s instructions.

What is the recommended procedure for calibrating a pH probe with this solution?

First, rinse the probe with distilled water and gently blot dry. Then, immerse the probe in the pH 4.00 solution, allow the reading to stabilize (typically 30–60 seconds), and record the value. Follow this with a calibration at pH 7.00 or another appropriate buffer to complete a two‑point calibration.

Is the solution safe to handle?

The solution is non‑hazardous under normal laboratory conditions. However, it is recommended to wear standard laboratory protective equipment such as gloves and safety glasses when handling chemicals.

What should I do if the solution appears discolored?

If a pouch shows any discoloration, cloudiness, or leakage, discard it and use a fresh pouch. Such changes may indicate degradation or contamination, which could affect calibration accuracy.