pH/ORP
Signet pH/ORP Buffer Solutions
The Signet pH buffers are ideal for many calibration requirements. The liquid solutions are conveniently packaged in one-pint bottles; the powder pillows are packaged in low weight, single-use containers that can be mixed with water. All pH buffers are color-coded for easy identification; 4.01 pH is red, 7.00 pH is yellow, and 10.00 pH is blue.
The pH buffers are traceable to NIST standards and certificates are available upon request. They are accurate to within ±0.01 pH units @ 25 °C and have long term stability.
These solutions are temperature sensitive and are provided with temperature correction values for the most accurate calibration. For applications that require ORP calibration, the pH 4 and pH 7 buffers can be mixed with quinhydrone powder for the correct measurement values of +264 mV and +87 mV respectively.
Advantages:
• NIST traceable
• Easily identifi able color-coded buffer solutions
• Liquid or powder versions
• Temperature-compensated values
• Kits for easy use
Calibration Tips:
1. The pH and ORP solutions can be used for calibrating more than one sensor within a day. However, the solutions must remain free of debris and must not be diluted by rinse water from previous calibrations.
2. ORP solutions made with quinhydrone are very unstable and may not read properly once exposed to air for a prolonged time. These solutions must be disposed of within an hour.
3. All other calibration solutions must be disposed of at the end of one day. Proper disposal is simply done by running tap water while pouring the used solutions slowly down the drain or per local requirements.
4. Use tap or deionized water to rinse the solutions off of the sensors.
Advantages:
• NIST traceable
• Easily identifi able color-coded buffer solutions
• Liquid or powder versions
• Temperature-compensated values
• Kits for easy use
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