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RT Dip Probe Hostile Environment


The TP300-UV-VIS Transmission Dip Probe couples to our spectrometers and light sources to measure the absorbance and transmission of solutions in harsh environments. The TP300-UV-VIS Probe is a chemically inert PEEK transmission probe that can be equipped with a tip (RT-PH) 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. The TP300-UV-VIS consists of two 300-µm optical fibers -- one illumination optical fiber and one read optical fiber -- in a 3.175-mm (1/8") outer diameter stainless steel assembly sealed into a PEEK polymer sleeve. You have the option of choosing solarization-resistant fibers or VIS-NIR fibers for your assembly.The PEEK sleeve, shown on the probe image at the top, is designed for environments with temperatures up to 200 °C. The PEEK material is also radiation-resistant and  has low flammability and excellent chemical resistance. The PEEK sleeve (TPSLEEVE) comes with the TP300-UV-VIS. An additional stainless steel sleeve (T300SLEEVE), seen at right, is available. The TP300 works the same way as the T300-RT and T200-RT probes. Light travels from the light source into the illumination leg of the probe and through a lens near the end of the probe. The light then transmits through the sample compartment to a second-surface mirror. The light reflects and travels back through the sample compartment a second time and is then focused by the lens onto the read fiber and through the read leg of the probe to the spectrometer. There are two adjustable-pathlength tips available for the TP300-UV-VIS. One allows you to adjust from 2-mm to 10-mm paths and another from 10-mm to 20-mm paths. Additionally, an RT-PH tip, seen at far right, is for mounting pH films in the optical path and is used for pH-sensing applications.



Item CodeDescription
TP300-UV-VISTransmission Dip Probe with 300 µm diameter UV/SR optical fiber (200-1100 nm) in 6.35 mm diameter ferrule
TP300-VIS-NIRTransmission Dip Probe with 300 µm diameter VIS-NIR optical fiber (400-2500 nm) in 6.35 mm diameter ferrule
T300SLEEVETransmission Dip Probe with 200 µm diameter VIS-NIR optical fiber (400-2500 nm) in 6.35 mm diameter ferrule
RTP-2-102 mm pathlength tip for T200-RT and T300-RT Transmission Probes
RTP-10-204 mm pathlength tip for T200-RT and T300-RT Transmission Probes
RT-PH5 mm pathlength tip for T200-RT and T300-RT Transmission Probes



Fiber type

TP300-UV-VIS: 300 µm UV/SR optical fiber
TP300-VIS-NIR: 300 µm VIS-NIR optical fiber

Outer diameter:

3.175 mm diameter for internal stainless steel assembly, 6.35 mm with PEEK polymer sleeve

Probe length:

107.9 mm

Fiber length:

2 meters


Fused silica

Pressure limit:

100 psi

Temperature limit:

Up to 200º C with PEEK sleeve


Adjustable from 2-10 mm (the RTP-2-10) or from 10-20 mm (RTP-10-20) For RT-PH, fixed at 16 mm

Probe sleeve:

Stainless steel internal assembly, PEEK for outer sleeve

Fiber jacketing:

PVDF jacketing


SMA 905