Humming Probe UH2
UH2 Micro pH STRIP ELECTRODE

pH-test paper/ pH test strip/ pH measurement/ pH strip electrode/ single use pH sensor

The world's pioneer for calibration-free pH measurement, innovatively integrating the principle of electrode measurement on a single test strip electrode for pH measuring.

Unique Features are as follows:

  • ・Accurate, calibration-free, ready=to-use
  • ・The industry's minimum sample usage(1-2 μL)
  • ・Disposable to avoid sample cross-contamination
  • ・Accuracy can reach ±0.1 pH
  • ・Each strip has a built-in temperature sensing element
  • ・Portable
  • ・Long shelf life single use pH sensor

Introduction video

Why is the Humming Probe pH Measurement System calibration-free?

Patented hydrogen ion exchange film design

Supply electrodes with fixed reaction area
We use the patented hydrogen ion adsorption film, in addition to selectively allowing hydrogen ions in the sample to pass through, to avoid the passivation caused by the adsorption of other matrices in the sample on the surface of the electrode and simplifies the sample processing steps. Furthermore, the surface-exchangeable hydrogen ion content in the Nernst equation, which affects the Ek' value, can be precisely controlled by the design of the hydrogen ion adsorption film.
Calibration principle and Nernst equation principle and application for the calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode/Humming Probe UH2/UltraE

Automated production technology

Make every electrode look "the same"
Automated production machine can quickly introduce R&D results into the production process for the most efficient bridging of R&D and production. The automatic production machine (G1) can achieve a CV value of 3~5% for the production stability of test strips through automated production model. In addition, we have developed different types of automated machines for different manufacturing process requirements, such as temperature sensing component assembly machines, to increase production stability and consistent quality.
Automatic production process of  the calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode/Humming Probe UH2/UltraE

Calibration before leaving the factory

Each test strip has been calibrated
Each test strip has been calibrated and verified using NIST traceability standards before leaving the factory, so you can simply take the test strip out of the vial and test pH directly. verified using NIST traceability standards before leaving the factory, so you can simply take the test strip out of the vial and test pH directly.
How the calibration-free ultramicro disposable pH electrodes/Humming Probe pH electrodes are accurately calibrated before leaving the factory /Humming Probe UH2/UltraE

Each strip is equipped with independent temperature sensing element

Smart temperature compensation for every test
Each test strip is embedded with an independent small-volume temperature sensing element. When the sample temperature is within the range of 10-40 degrees, even with a small quantity of sample, it also has automatic temperature compensation (ATC), and the resolution can reach ±0.01 pH.
The temperature compensation element of the calibration-free ultramicro disposable pH electrode/Humming Probe pH electrodes/Humming Probe UH2/UltraE

What makes the Humming Probe pH Strip – UH2 special
in addition to being free of calibration?

Sample size is down to microliters for the calibration-free ultramicro disposable pH electrodes/Humming Probe pH electrodes/Humming Probe UH2/UltraE
The industry's minimum sample usage
UH2 electrode size is reduced to 2mm
Sample requirements can be reduced to 1 microliters

Biological samples such as blood, saliva, cerebrospinal fluid, tissue fluid, etc…cannot be sampled in large quantities. Usually such small quantities of samples require the purchase of expensive ultra-small glass electrodes of pH meter to complete the test. UH2 can detected samples with no damage to the specimen and no pretreatment required.

Calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode can be used in living body detection /Humming Probe UH2/UltraE

Living body (fish blood) detection

Calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode can be used in body fluid detection/Humming Probe UH2/UltraE

Body fluid (perspiration) detection

Disposable design and single use pH sensor, broaden the application in various fields

A brand-new test strip can be taken from the vial for each use and requires no time-consuming cleaning or maintenance after testing. For viscous or easily adsorbed samples or in combination with various special treatments, it breaks through the limitations of traditional glass electrodes and provides you with more applications.

Special treatment such as sterilization and inactivation can be carried out to test culture medium pH value by the calibration-free micro disposable pH electrode/Humming Probe pH electrode/Humming Probe UH1/UltraE

Allows special treatment such as sterilization and inactivation

Calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode can be used in viscous samples that are difficult to clean up/Humming Probe UH2/UltraE

Test viscous samples that are difficult to clean up

Calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode can be used in viscous samples detection and will not contaminate the pores of the pH electrode surface /Humming Probe UH2/UltraE

Disposable Design

We provide high precision pH measurement. The values can be displayed to 0.01, and the accuracy can reach ±0.1 pH. Testing pH values from 0 to 14 can be satisfied.

Slim detection electrode design

The slim electrode design is convenient to be put in narrow channels, sampling ports, or inserted into living organisms.

Portable and easy storage

The thickness of traditional glass electrode’s glass film is only 0.1-0.3mm, so it is easy to break. For storage, it needs to be continuously immersed in liquid storage solution, so special care is needed for carrying. The special design of the Humming Probe does not contain any filling liquid. Small size, portable, just put it in the vial with a tight lid, suitable for mobile outdoor testing environment.

How accurate is the Humming Probe pH Measurement System?

Laboratory Test
Compare the measured data with the NIST standard pH buffer value, and obtain the correlation coefficient according to the linear regression equation
NIST standard pH buffer2712
Sampling number101010
AVG(pH)1.996.9911.97
SD(pH)0.010.020.03
CV(%)0.75%0.35%0.26%
Accuracy Rrange(pH)0.050.080.09
Compare the measured data of UH2 with the NIST pH buffer value
Measurement range:pH 0 - 14*
Slope:1.0029
Intercept:-0.0521
Correlation coefficient:0.9999
*pH 0 solution is 1.0 M HCl solution
pH 14 solution is 1.0 M NaOH solution

Linearity

Precision

Accuracy

In terms of quality control, the production of all test strips and instruments is performed by UltraE. In addition to accurately mastering the production technology, we also control the product quality throughout the process. The test strips start from the raw material, through the substrate bare chip printing, to the high polymer film process and temperature sensor assembly process, and follows 100% full inspection process to ensure product stability. We are also officially ISO 9001:2015 certified, assuring our partners of quality and standardized processes.

ISO Certification
SGS Laboratory Test Report

Trusted by precision laboratory in universities and enterprises

How to use the Humming Probe pH Measurement System?

All products are calibrated and inspected using NIST traceability standards before leaving the factory, and each batch of calibration information is printed as QR code on the cap of the vial. Scan the QR Code when using the strip for the first time to load the technical parameter of the pH strip into the meter, and then the pH measurement can be performed directly. Unlike traditional glass electric appliances, the Humming Probe is extremely convenient, not requiring traditional and complicated calibration steps.

The instructions of the calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode /Humming Probe UH2/UltraE


Take the pH strip electrode out from the vial.

The instructions of the calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode /Humming Probe UH2/UltraE

Measuring method 1
Test by directly dropping samples onto the strip

The instructions of the calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode /Humming Probe UH2/UltraE

Measuring method 2
Put the pH strip electrode into the sample solution.

Find your Humming Probe

Most Popular

Classic

Suitable for most
testing requirements

UH1 pH STRIP
  • Suitable for liquid samples

  • Ultra small sample requirement:
    10-20 μL

  • Suitable for single & continuous test

More

New

Micro-sample

Suitable for precious
and micro samples

UH2 pH STRIP
  • Suitable for liquid samples

  • Ultra small sample requirement:
    1-2 μL

  • Suitable for single & continuous test

More

New

Gas

Suitable for
gas samples

UH2-Gas pH STRIP
  • Suitable for gas samples

  • Lower limit of detection

  • Suitable for single & continuous test

More

Find your meter and accessories

UX100 pH Meter

  • 4.3” Color Waterproof Touchscreen
  • Waterproof: IP54
  • Dual Mode Inspection Design
  • Built-In 5M Pixels Camera, Data Editable
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UX200 pH Meter

  • pH chart
  • 7” Color Touchscreen
  • Waterproof: IP54
  • Dual Mode Inspection Design
  • Built-In 5M Pixels Camera, Data Editable
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CS200 MAGNET INVERTER MIXER

  • Constant Temperature Control (20-40°C)
  • Digital Speed Control/Display (400-1500rpm)
  • Clockwise & Counter-Clockwise Design
  • Beaker Size Range (10-500 mL)
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UH2 pH Strip Electrode

Download DM
Dimensions and packaging specifications of the calibration-free ultramicro disposable pH electrode/Humming Probe pH electrode/Humming Probe UH2/UltraE
UH2 pH Strip Electrode
Range:pH0 - 14
Accuracy:± 0.1pH
Minimum Sample volume:1 - 2μL
Sample temperature:10 - 40℃
Dimension (W x L x T ):12.6 x 50.0 x 1.0 mm

Note:The pH Test Strip Electrode should always be capped and stored in the vial and only to be taken out when using. Each vial contains 25 pieces of pH test strip electrodes, and each box contains 2 vials.

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