pH Paper and other Test Strips
Single-use test materials used to rapidly and semi-qualitatively determine the acidity or alkalinity of liquids or to measure another parameter or substance; may include tests for starch, chlorine, and molybdenum; usually via the use of color-based reactions.
pH Papers, pH strips, pH sticks, and pH test kits are used in laboratory, industrial, and educational environments to qualitatively assess pH levels or monitor acid-base titrations in a range of sample types.pH Buffer reference standards are used for the accurate calibration of pH meters and monitors for far more precise and quantitative pH measurement.
pH Test papers are supplied either as rolls, tear-off strips, or sticks. They are impregnated with indicator dyes that change color at a specific pH. In some products, indicator dyes are covalently linked to cellulose fibers to avoid bleed-out (leaching) and contamination of the test sample.
Some pH papers indicate simple acid or base conditions with a single red-to-blue color change (also called litmus papers). Universal pH papers and strips contain a combination of indicators that cover a range of pH values up to and including 0 to 14 in a single test. The observed color change is checked against a comparison chart supplied with the papers.
Alternatively, for metered assessments of pH, standard or reference pH buffers are used to calibrate pH meters and other electrochemical sensors.
Standard Buffer Characteristics:
• Typically supplied at fixed values of pH 4.01, pH 7.00, and pH 10.01
• May be color-coded for easy and quick identification
• Certified to their nominal pH and accuracy at a specified temperature (typically 20°C)
• Supplied as ready-to-use solutions or concentrates
• Contain antifungals for extended shelf life
Sprayer Depot 20" X 1" WATER SENSITIVE PAPER
These specially coated papers are used for evaluating spray distributions, swath widths, droplet densities and penetration of spray. Water sensitive paper is yellow and is stained blue by exposure to aqueous spray droplets.
MSC Mitutoyo Screw Drop Indicator Back, 12.7 mm Diameter, AGD Group 2, #1/4-28UNF Thread
This indicator back is designed for use with AGD Group 2 indicators, featuring a screw mount for secure attachment. It is particularly useful for special applications where the standard indicator back needs to be replaced. With a 12.7 mm diameter and a #1/4-28UNF thread size, it provides a precise and stable connection.
- Screw mount
- 12.7 mm diameter
- Compatible with AGD Group 2 indicators
- #1/4-28UNF thread size
- Ideal for special applications requiring indicator back replacement
MSC SPI Dial Drop Indicator, 0.4000 in Max Measurement, 0-50 Dial Reading, 0.001500 in Accuracy
This dial drop indicator features a white dial with 0.000500 inch graduation and a lug back. It is designed for precise measurements up to 0.4000 inches with an accuracy of 0.001500 inches, offering a 0-50 dial reading and a range of 0.0500 inches per revolution. This instrument is suitable for various measurement applications requiring high precision.
- Counter pointer
- Easy to read graduation
- Jeweled bearing type
- Includes short form certificate of calibration
- Includes lug and flat back
- NIST certified