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PH值探头

TheFiberOpticpHSensorsystemconsistsofafiberopticprobedesignedtoholdimmobilizedcolorimetricindicatordyematerials, plusalight source,spectrometerandOOISensorsSoftware.Youcansupplyyourownindicatormateria

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The Fiber Optic pH Sensor system consists of a fiber optic probe designed to hold immobilized colorimetric indicator dye materials, plus a light

source, spectrometer and OOISensors Software. You can supply your own indicator material, or select from our line of transparent or reflective

films. Calibration involves recording spectra in high and low pH samples, and in at least one pH standard such as a NIST-traceable buffer.

Transmissive and Reflective pH Films

Transmissive films are for clean, transparent samples. These films consist of a cellulose mechanical matrix surrounded by a hydrophilic polymer

that entraps the indicator dye. Reflective films are used for turbid or absorbing media.

Film Performance

When immersed in water, the film dyes may leach very slowly over time and will have to be replaced. The film response rate is slow (on the order

of minutes), being limited by diffusion of ions into the material. Increasing stirring speed, ionic strength and temperature all tend to increase the

response rate and do not affect the pH measurement. Nearly any aqueous sample environment is suitable, as are some solvents.

TP300 Probe

The TP300-UV-VIS Probe is a chemically inert PEEK transmission probe that can be equipped with a tip for mounting transmissive films in the optical

path. Light is directed via one fiber through the mounted film to a mirror. Then light is redirected back through the film to a receive fiber that returns the

light to the spectrometer. The sample is free to flow over the sides of the film. By using an RTP-2-10 (adjustable 2-10 mm) Transmission Tip, the

TP300-UV-VIS can be used for routine transmission measurements.

Item	Specification
Fiber type	(2) 300 µm core diameter fibers (1 illumination, 1 read)
Outer diameter:	3.175 mm
Length:	107.9 mm for probe, 2 meters for fiber
Optics:	Fused silica
Internal materials:	Aluminum
Pressure:	100 psi
Pathlength:	16 mm with RT-PH Tip
Outer materials:	PVC fiber jacketing, PEEK polymer for sleeve
Connector:	SMA 905
Operating temperature:	Up to 220º C with PEEK sleeve

RF200 Probe

The RFP200-UV-VIS Reflective Film Probe consists of a 6-around-1 fiber bundle in a chemically inert 6.35-mm OD Torlon body. The open tip of the probe

screws onto the body to hold 3.17-mm to 4.76-mm discs of reflective indicator material. The 6-fiber leg attaches to the light source; the central fiber leg

connects to the spectrometer. The sample has access to the sensing material from one side only.