An 80,000 µS/cm standard solution for precisely calibrating a conductivity meter
Over time, a conductivity probe can gradually lose accuracy. Salts, minerals, and various residues present in the measured liquids can deposit on the electrodes, while the natural aging of the sensor can also alter its response. The Milwaukee MA9064, with its 80,000 µS/cm resolution, allows for easy verification of the device's performance and recalibration when necessary.
This solution is designed for devices using a calibration point of 80,000 µS/cm, or 80.0 mS/cm . Before starting the calibration, it is important to verify in the conductivity meter or tester's manual that this value corresponds to the standard recommended by the manufacturer. A calibration solution adapted to the device is essential to obtain a consistent and usable measurement.
Milwaukee conductivity solution with NIST traceable reference
The quality of a calibration depends directly on the reliability of the reference solution used. The Milwaukee MA9064 is prepared from potassium chloride calibrated according to the NIST 2202 SRM reference material . This traceability provides a reliable and reproducible metrological benchmark for verifying measuring instruments.
The preparation is carried out in deionized water suitable for analytical use , in accordance with the requirements associated with ISO 3696 and BS 3978 standards. This process makes it possible to obtain a stable solution whose known conductivity can be used as a reference during verification and calibration operations.
Why use a conductivity meter calibration solution regularly?
A conductivity meter can continue to display perfectly readable values even though it has gradually drifted from its original calibration. A probe regularly exposed to saline or highly mineralized solutions, in particular, is likely to accumulate deposits capable of altering its electrical response .
Periodically using a standard solution of known conductivity allows the instrument's measurement to be compared to a reference value. When the discrepancy becomes significant, a new calibration restores the conductivity meter's accuracy. This check is particularly useful when a variation of a few percent could affect the interpretation of the results.
A conductivity value suitable for measurements at high concentrations
With a nominal value of 80,000 µS/cm , the MA9064 operates in a high conductivity range. It is therefore particularly well-suited to conductivity meters whose calibration procedure includes this reference, especially for measurements performed on solutions with high salt or ion concentrations.
The value of 80,000 µS/cm also corresponds to 80.0 mS/cm . Both units may be encountered in the technical documentation of devices. It is indeed the same conductivity expressed in two different forms: 1 mS/cm corresponds to 1,000 µS/cm.
Influence of temperature on the conductivity solution MA9064
The electrical conductivity of a solution is not a value entirely independent of its environment. It naturally varies with temperature . A standard solution used at a temperature different from the reference temperature may therefore exhibit a conductivity slightly higher or lower than its nominal value.
To avoid inaccuracies, Milwaukee prints a table directly onto each bottle of MA9064, indicating the actual value in µS/cm at various temperatures . This allows the user to immediately know the expected conductivity of the solution under real calibration conditions. This information is particularly useful when a device lacks automatic temperature compensation or when more rigorous manual control is required.
230 ml bottle designed to preserve the stability of the solution
A standard solution must remain as stable as possible during storage. Milwaukee therefore packages MA9064 in a 230 ml hermetically sealed bottle with a tamper-evident cap. This packaging limits exposure to air and protects the solution from light before use.
This protection is important because gradual evaporation could concentrate the solution and alter its conductivity. Contamination from the environment or an instrument could also distort its reading. The bottle is therefore designed to maintain the characteristics necessary for reliable and reproducible calibration for as long as possible.
Batch number, expiry date and shelf life of up to 5 years
Each bottle of Milwaukee MA9064 bears a clearly identified batch number and expiration date . This information facilitates the tracking of solutions used, particularly in a professional environment or laboratory where the traceability of calibration products can be important.
The solution has a shelf life of up to 5 years , provided the date indicated on the bottle is respected and it is stored correctly. After opening, it is recommended to reseal the container promptly and avoid any contamination in order to best preserve the stability of the standard.
How to use the Milwaukee MA9064 conductivity solution?
To achieve the cleanest possible calibration, the probe must be thoroughly cleaned and rinsed before use. It is preferable to pour a small amount of MA9064 solution into a clean container rather than directly inserting the probe into the main bottle. This precaution minimizes the risk of contaminating the entire contents.
The probe can then be immersed in the solution following the instructions provided by the conductivity meter manufacturer. The measurement should be allowed to stabilize, and then the adjustment should be made to the value corresponding to the solution temperature. Ideally, the portion used for calibration should never be returned to the original bottle .
After use, the bottle must be immediately and securely closed. Storing it in a suitable place, away from significant heat sources and direct light, helps maintain the solution in good condition until its next use.
Technical specifications of the Milwaukee MA9064
- Brand: Milwaukee
- Reference: MA9064
- Type: conductivity standard solution
- Nominal conductivity: 80,000 µS/cm
- Equivalence: 80.0 mS/cm
- Reference solution: potassium chloride
- Traceability: NIST 2202 SRM
- Preparation: Deionized water for analytical use
- Preparation references: ISO 3696 / BS 3978
- Capacity: 230 ml
- Packaging: airtight bottle with tamper-evident cap
- Protection: packaging that limits exposure to air and light
- Product traceability: batch number printed on each bottle
- Expiration date: indicated on each bottle
- Shelf life: up to 5 years from the date indicated
- Temperature compensation: table of values in µS/cm printed directly on the bottle
