Transmission Dip Probes

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.

Probe Assembly

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.

PEEK Polymer Sleeve

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.

Theory of Operation

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.

Adjustable-pathlength Tips

Pricing

Item Code	Description	Price
TP300-UV-VIS	Transmission Dip Probe with 300 µm diameter UV/SR optical fiber (200-1100 nm) in 6.35 mm diameter ferrule	Call for Price
TP300-VIS-NIR	Transmission Dip Probe with 300 µm diameter VIS-NIR optical fiber (400-2500 nm) in 6.35 mm diameter ferrule	Call for Price
T300SLEEVE	Transmission Dip Probe with 200 µm diameter VIS-NIR optical fiber (400-2500 nm) in 6.35 mm diameter ferrule	$290
RTP-2-10	2 mm pathlength tip for T200-RT and T300-RT Transmission Probes	$278
RTP-10-20	4 mm pathlength tip for T200-RT and T300-RT Transmission Probes	$278
RT-PH	5 mm pathlength tip for T200-RT and T300-RT Transmission Probes	$278

Specifications

Item	Specifications
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
Optics:	Fused silica
Pressure limit:	100 psi
Temperature limit:	Up to 200º C with PEEK sleeve
Pathlength:	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
Connector:	SMA 905