Ocean Optics pH Sensor Patches, Probes and Cuvettes - Manual (Page 16)

1: Products
10 PHSENSOR-TRANS-REFLECT-201111
Storage/Lifetime
Cuvettes can be stored dry at room temperature for any amount of time. As a rule, once the maximum
absorbance at pH 11 falls below 0.1, the cuvette should be discarded and replaced (assumes a
reference of pH 1). The cuvette’s lifetime depends on frequency of use, harshness of the samples it is
exposed to, the temperature of samples, and other environmental factors.
Performance Specifications
Specification Ocean Optics pH Probe Value
pH range 5 – 9
Analytical Wavelength 620nm
Baseline Correction Wavelengths 512nm (isosbestic) or 750nm
Calibration Options User Calibration with 6 Buffers
Factory Calibration with 3 Buffers
Immediate Startup with No Buffers (requires undisturbed setup)
Typical Absorbance Range 0.15 – 0.30
Typical pK Range 6.1 – 6.5
Typical Slope Range 2.2 – 3.0
User Calibration Accuracy < 1% of reading across range
Factory Reset Accuracy 0% at reset point
1% Within 1 pH unit of reset
Up to 4% at 3 pH units from reset
Resolution 0.01 pH
Response Time, t
(90)
10 seconds
Stability No detectable drift for up to 12 hours
1% per day for long term monitoring
Interferences Cannot be used with colored or turbid liquids
Yellow liquids can be used if the 750nm baseline is used