The HPF-D040 fiberoptic leak detector is inherently safe in that there is no circuitry at the sensing point, only light from the associated amplifier. The amplifier would be mounted out of the immediate sensing area. The small and narrow sensing head and bracket are composed of chemically resistant Teflon(r) PFA material.

A detachable mounting bracket block with an integral 316SS mounting grommet insures adequate retention while offering easy maintenance capability. The 5 meters of cable length has a 60 micron covering of PFA material that provides chemical protection along with field cut-to-desired-length ability.

Quick detection of spills is adjustable via the amplifier used. 1ml of liquid typically is required to change the amplifier's state. The fail safe design is achieved by conducting light back to the amplifier when liquid is not present. Liquid presence or a cable break will stop the light from being returned. Unlike the self-contained version and competitive offerings, the customer's pan is used to stabilize and adjust the light return when setting the amplifier. If the sensor becomes unattached and no longer sees the pan reflection, the output will turn off. We call this "floating head detection" capability.

Please contact your local Yamatake sales office as defined on the back cover of this brochure for information on these products:

• HPX-NT Series Single unit, most sophisticated, digital output, microprocessor based, 7 training modes, 3 operation modes, fully adjustable timers and thresholds
  
• HPX-ET Series Gang mounted, digital output, microprocessor based, 6 training modes, fully adjustable timers and thresholds
  
• HPX-T Series Single unit, digital output, microprocessor based, 3 training modes, 40 millisecond off-delay option
  
• HPX Series 3 turn potentiometer with indication, lowest cost, high power or low contrast versions recommended

These fiber cables are used exclusively for liquid level detection in chemical baths, cleaning baths, and spin coaters/developers. The liquid surface is detected by contact of the sensor tip with the liquid surface. The proprietary tip structure prevents liquid buildup so stable detection is maintained. Their bend radius is less than all known competitors at 30 or 40mm and they have an operating temperature range of -30 to 105 degree C. Cable length is 2 meters.

The HPF-EU05 is a handy fiberoptic extension cord, so to speak, that can be used to extend the fiberoptic connection from the sensing fiber back to the controlling network. Quick implementation of this extension fiber cable accessory is provided by: 1) a fiber fixation lever that operates the same as those found on a standard fiberoptic amplifier, 2) small space saving size can be mounted to a hole cut in the plate with one motion. Optical coupling power is maximized by the unitized structure of the fiber connector.

HPF-T027- This fiber cable is configured using right angle viewing lenses. The lenses allow extra scanning power through the impervious Teflon(r) PFA covering that is vacuum formed around the sensing tip and fiber cable body. Cable may be cut to length at the sensor end.

HPF-T029 - This fiber cable pair is the latest technology in Teflon cabling. Bend radius of 20 mm is best in class. Scanning ranges of 5.25 meters when used with high power mode of the new HPX-NT series is also best in class. Additionally, the price is 40% lower than the traditional industry standard.

This fiber cable pair is completely covered by an impervious, vacuum formed Teflon (PTFE) layer over the sensing head and body of the fiber cable. The sensor end may be cut to length. This cable pair can be used in cleaning baths, chemical baths, and spin coaters/developers found in semiconductor processes. Fiber cable assemblies are 100% positive pressure tested to insure no leaks before shipment.

The HPF-T032 fiber cable liquid sensor features a Fail Safe design using an array style light beam. Unlike all know competitive offerings, the HPF-T032 emitter/receiver arrangement requires a beam refraction of 1.33 to 1.7 in order for the light to be transmitted. This provides the utmost prevention of false detection due to deposits on the inside of the chemical piping. The array arrangement of the fibers provides a much higher contrast signal level and the ability to not be affected by bubbles of even 3mm size. The housing is made from GE Ultem(r) plastic that is highly resistant to most organic solvents and is capable of high temperature exposure. The HPF-T032 sensor can be used with pipe sizes from 1/8" to 1/2" (3-13mm) and the fiber cutter and mounting hardware is shipped with each sensor. A 60 micron covering of Teflon(r) PFA material protects the 5 meter fiber length from chemical attack.