Sapphire ATR Probe

Sapphire ATR Probe	StellarNet Inc. offers a low-cost, rugged, sapphire ATR (attenuated total reflection) probe that is ideal for use in an industrial process environment. It is capable of operating at temperatures from -50°C to 300°C and at pressures up to 1200 psi. This outstanding performance is achieved by using Kalrez® O-ring seals. The sapphire ATR probe is a three-bounce design, which affords a total path length of approximately 1.5 microns. Sapphire allows response down to 220 nm in samples with an index of refraction up to 1.5, as well as offering excellent resistance to chemical attack. The optical fiber is 400-micron core fused silica and is clad in stainless steel armor. If needed, the armor can be sealed with Teflon® to provide a barrier to the environment. A four-inch extension tube is added to the rear of the probe to allow direct insertion into a process stream. The extension tube can be adapted to the customer's process connection requirements. TECHNOLOGICAL INNOVATIONS The sapphire ATR probe is constructed such that it requires no internal optical elements other than the sapphire hemisphere. This makes the probe simpler to manufacture, and more rugged than is possible with a complex optical design. This design produces a more stable, flatter baseline and more linear response. SPECIFICATIONS
	*OPTICAL*	(220nm to 2200nm)
	Pathlength Range	3 bounce (~1.5 microns)
	Lens/Window Material	Sapphire
	Numerical Aperture	1.5
	Efficiency	>15% at 500nm**
	Fiber OpticTermination	SMA 905
	Fiber Optic Type	400/440 Silica on Silica*
	Fiber Optic Cable Type	Armored Duplex ^##
	Fiber Optic Length	3 meters to 200 meters
	*PHYSICAL*
	Body Materials	316 SS***
	Body Length ^#	1.75"
	Diameter	0.5"
	Seal Type	Single o-ring
	Seal Material	Kalrez®***
	Temperature Range	-50º to 300º C
	Maximum Pressure	1200 psi
	* Specify UV or NIR grade Fused Silica - UV grade 200nm to 900nm - NIR grade 350nm to 2200nm.	** Efficiency measured relative to direct fiber connection between light source and detector using 400 micron core fiber optic.
	*** Other materials available upon request - allow 8 weeks for delivery of special materials.	# Four-inch probe extension tube standard - other lengths up to 1 meter available.
	## Optional Teflon® seal available for armor.
	Kalrez and Viton are registered trademarks of DuPont Dow Elastomers Teflon isa registered trademark of DuPont