 R1000-4
pH Probe
The new R1000-4 pH Probe from Ocean
Optics is designed to work with non-intrusive reflective pH patches
(PH-BCG-REFLECT) but can also be used with our RedEye oxygen sensor
patches.
This probe consists of four 1000 µm plastic fibers
arranged in a 3-around-1 configuration.
The three illumination fibers are angled at 25.5° to
focus light to the center of the sensor patch.
The R1000-4's design greatly increases back
reflection -- improving the signal-to-noise ratio. This is critical
for ambient light and color immunity that makes our sensors so
unique and efficient.
 Specifications
| pH range: |
5-9 |
| Temperature range: |
-5 - 60 °C |
| Analytical wavelength: |
617 nm |
| Baseline correction
wavelengths: |
509 nm (isosbestic) or 800 nm |
| User calibration
accuracy: |
Up to 2% of reading |
| Factory reset accuracy: |
0% at reset point
1% within 1 pH unit of reset
Up to 4% at 3 pH units from reset |
| Resolution: |
~0.03 pH unit in most cases |
| Response time (t90): |
30 seconds depending on salinity of
sample and liquid flow at sensor interface |
| Sterilization: |
Gamma, EtO |
|
