Litmus/Universal pH Test Paper

pH test strips work by immersing the strip into a liquid, causing the indicator on the strip to change color. The resulting color is then compared with a standard color chart to determine the pH range. They are used for rapid detection of the acidity or alkalinity of solutions and are commonly employed in water quality monitoring, chemical reaction control, and preliminary screening in laboratories.
Selection
When selecting, consider the measurement accuracy requirements: narrow-range test strips are suitable for precise measurements, while wide-range ones are ideal for rapid screening. Pay attention to the corrosion resistance of the test strip material, and ensure that the accompanying color chart is clear and easy to read. Choose either universal or specialized test strips based on the characteristics of the solution to be tested.
test range
precision

Terms

Standards

Instruments

Glass electRode design, rugged, in line with IP67 waterproof standards; Measurement range - 2.00~ 16.00pH, accuracy +/- 0.02pH; built-in automatic temperature compensation and Sensor Check ™ function, convenient real-time monitoring of ElectRode status.

$ 1027.00

Pellon liquid junction is used to ensure uniform Flow velocity, circular Glass sensitive film fully senses pH value, Measurement range 0~ 14pH, Operating temperature 0~ 60 ℃, the structure is not easy to damage.

$ 96.00

ElectRode composite plastic shell design, no temperature compensation function, suitable for non-high temperature measurement, accurate and stable measurement, strong versatility.

$ 91.00

Measurement accuracy of +/- 0.05pH, resolution of 0.01pH, pH and mV can be detected at the same time, built-in battery supports 10-15 hours of battery life, easy to operate, stable and reliable.

$ 127.00

Universal regulator can be constant background ion strength, Shielding interference ions and adjust the pH value, using PTFE bottle Encasement, capacity 480mL, suitable for silver ion type.

$ 135.00

Measurement accuracy of 0.01 pH, support automatic temperature compensation and pH/mV/temperature Multi-ParaMeter measurement, simple, stable and reliable operation.

$ 175.00

Measurement accuracy of +/- 0.02pH, resolution of 0.01pH, support three-point calibrated, built-in Glass electRode, small size weighing only 88g, suitable for 0-50 ℃ environment, easy to quickly detect on site.

$ 104.00

Measurement range 0.00-14 pH, accuracy +/- 0.05pH, with temperature compensation function, portable design for easy field use, large screen LCD display is clear and intuitive.

$ 114.00

Measurement range 0.00-14 pH, accuracy +/- 0.05pH, with automatic temperature compensation function, portable design for on-site fast detection, repeatability error only +/- 0.03.

$ 105.00

Measurement accuracy of +/- 0.1pH with three-point calibrating technology, PH and temperature can be measured simultaneously, compact and portable, suitable for outdoor use.

$ 107.00

Adopt 3-in-1 composite structure integrated temperature sensor, Round Glass sensitive membrane to ensure full induction, Fiber liquid interface provides stable measurement, Measurement range 0~ 14pH, equipped with 1 Meter BNC cable.

$ 106.00

Using planar pH ElectRode design, Measurement accuracy of 0.01pH, Support 1-3 point Automatic calibration, with automatic temperature compensation and end point locking function, full waterproof structure to ensure harsh environment use.

$ 178.00

Glass shell and sensitive membrane, pH Measurement range 0-14pH, Temperature range 5-60 ℃, suitable for routine sample measurement, liquid boundary is ceramic core single salt bridge, reference type Ag/AgCl.

$ 98.00

Using external ElectRode design, Measurement accuracy of 0.01pH, support 0.1-14 pH range and 0-50 ℃ temperature measurement, small size for on-site detection and operation.

$ 112.00

Using microprocessor control, pH Measurement accuracy of +/- 0.02pH, support three point calibrated (4.01, 6.86, 9.18), simple operation, stable and reliable performance.

$ 107.00

Articles

Extended Application of Paper Water Absorption Tester in the Dispersibility Evaluation of Tissue Paper
This article explores how to extend the application of an instrument originally used for testing the water absorption capacity of paper to evaluate the dispersibility of tissue paper.
Short Span Compression Strength (SCT) Tester for Analyzing Paper Compression Resistance
The short-span compressive strength (SCT) tester is used to measure the resistance of materials such as paper and cardboard to compression over a short distance, primarily following international standards such as ISO 9895.
The Working Principle and Calibration Method of Electronic Paper Tensile Strength Tester
The electronic paper tensile strength tester is used to measure the mechanical properties of materials such as paper under tension. It is recommended to calibrate the instrument annually and maintain a stable environment along with clean fixtures during daily use.
Key points for measuring the pH of water-based ink with a pH meter
This article introduces the key steps for measuring the acidity or alkalinity of water-based inks using a pH meter.
Correlation Analysis between Puncture Strength and Bursting Strength of Paperboard
This article analyzes the correlation between the puncture strength and burst strength of cardboard. The two properties respectively measure the ability of cardboard to resist dynamic impact and static pressure. Although their testing principles differ, both are closely related to factors such as the fiber structure and lamination process of the cardboard.
When to use three-point calibration versus two-point calibration for pH meters?
The calibration of a pH meter is performed to determine the actual zero potential and slope of the electrode, enabling accurate measurement of the acidity or alkalinity of a solution. Two-point calibration is commonly used for daily measurements within a narrow range, while three-point calibration is employed for higher accuracy requirements.
Friction Coefficient Tester in the Testing of Paper Slip and Stacking Performance
This article introduces how a friction coefficient tester measures the slipperiness and stacking performance of paper. By measuring the friction on the paper surface, it calculates the static friction coefficient and dynamic friction coefficient, which correspond to stacking stability and slipperiness, respectively.
The role of black-and-white test paper in contrast ratio measurement
Black-and-white test paper plays a key role in determining the contrast ratio of coating materials. The contrast ratio is an important indicator of hiding power, calculated by comparing the reflectance of the coating on black and white substrates.
The softness tester can show a data difference of up to 30% when measuring paper hand-feel samples taken from different directions.
This article mainly discusses that when testing the softness of paper, if samples are taken along different directions, such as the machine direction (longitudinal) and the cross direction (transverse), the measured data can vary significantly, sometimes by as much as 30%.
How much does the sampling direction affect the accuracy of the short-span compression tester for measuring cardboard compressive strength?
The short-span compression tester is used to measure the edge crush resistance of cardboard, but the sampling direction significantly affects the results. The compressive performance of cardboard differs in the machine direction and the cross direction, with experimental data showing a strength difference of 20% to over 50% between the two.