KEYENCE FU-95(HZ) - Manual (Page 2)

2
Specifications
■ Liquid-contacting (fluorocarbon polymer) type
*1 No freezing
*2 Hydrofluoric acid cannot be used in detection.
Detection also cannot be performed with some liquids, such as those with a milky-white color.
■
Pipe mounting type
*1 The recommended pipe wall thickness is 1 mm (when using the FS-V10/V20/V30 Series).
*2 No freezing.
*3 Detection cannot be performed with some liquids, such as those with a milky-white color.
*4 When normally used under high temperatures, the recommended ambient temperature is 90
C
max.
*5 FU-95HA uses fluorocarbon polymer coating.
*6 OP-82177 for FU-95W [cable tie (W4.8 x H1.3 x L445) x 2, nonslip rubber tube x 2] is sold sepa-
rately and is compatible with pipe diameters from 26 to 80 mm.
Safety Precautions
■ Precautions for sensitivity adjustment
Common
• As noted above, when the liquid level detection sensor is used to detect water or another type of
colorless, clear liquid, the detection principles state that the received light intensity is higher when
there is no liquid and lower when there is liquid (during contact with a liquid).
• If the liquid has a milky-white color or another highly reflective color, the received light intensity
increases when there is liquid, which may reduce the sensitivity in terms of detecting the presence
of a liquid.
• If chattering occurs due to problems such as bubbles or dripping, use a timer to delay detection.
• If there are concerns about fluctuations of the displayed value when using a digital display ampli-
fier, use the scaling function on the FS-V30 Series amplifier unit.
■ Precautions about mounting
Liquid-contacting type FU-93(Z)/94C
• A thermal expansion tube is inserted 80 mm from the end in order to secure the sensor section and
the fluorocarbon polymer tube. Bending or cutting this area will cause the rigid properties to
weaken.
• Do not pull or apply excessive force to the fiber cable. Keep pulling to a maximum of 30 N 3sec.
• Clean before use according to the operating environment.
• If means are needed to differentiate between FU-93 and FU-93Z, attach the silicon tube that comes
with FU-93Z to the fiber cable.
Pipe mounting type FU-95(Z/HA/S/W)
• Detection may not be possible when using a pipe with thick walls (3 mm or higher).
• Opaque pipes cannot be used.
• Do not pull or apply excessive force to the fiber cable. Keep pulling to a maximum of 10 N
3sec.
■
Precautions for liquid level detection
Liquid-contacting type FU-93(Z)/94C
• Stable detection may not be possible when using one of the following liquids.
When bubbles are attached to the sensor tip
When liquid drips onto the sensor tip during a period of no liquid contact or when liquid is
attached to the sensor tip
Liquids with highly reflective color, such as milky-white
Liquids that stain the fluorocarbon polymer coating, such as high temperature oil
• Hydrofluoric acid or high temperature substances such as acids, alkali, or vapors can pass
through the fluorocarbon polymer coating, corrode the internal fibers, and lead to damage or a
reduction in sensitivity.
• When used under high temperatures, the fluorocarbon polymer becomes a maximum of 3% of the
total length longer. Take this into consideration when determining the mounting position.
Pipe mounting type FU-95(Z/HA/S/W)
• Stable detection may not be possible when using one of the following liquids.
When bubbles occur in the pipe
When dripping occurs on the inside of the pipe walls
Liquids that stain the transparent tube
• The 16 optical axis type is less affected by bubbles and dripping than the single optical axis type.
Model FU-93 FU-93Z FU-94C
Detection target Liquid *2
Repeatability 1 mm max. (for water)
Pressure resistance -49 kPa to 490 kPa
Ambient temperature *1 -40 to +70 C -40 to +50 C -40 to +200 C
Minimum bend
radius
Fluorocarbon
polymer section
R40 mm (Cannot be bent within 80 mm from the edge)
Fiber section R25 mm R0.5 mm R25 mm
Fiber length 2 m (free-cut) 2 m
Fiber material Plastic (fluorocarbon polymer coating)
Multicomponent glass
(Fluorocarbon polymer
coating, with SUS
protective tube)
Weight Approx. 78 g Approx. 90 g
Accessory
Fiber cutter x 1, Adapter A x 1
Model silicon tube (FU-93Z only) x 1
None
Type
Air bubble/dripping
countermeasures
(16 optical axes)
Compact (Single optical axis)
Model FU-95S FU-95W FU-95Z FU-95HA FU-95
Detection target Liquid *3
Mounting
transparent
pipe diameter *1
4 to 26 mm
26 mm min.
recommended
(No upper limit)
4 to 26 mm
Repeatability 1 mm max. (for water)
Ambient
temperature *2 -40 to +70 C -40 to +50 C -40 to +105 C *4 -40 to +70 C
Relative humidity 35 to 85% RH (No freezing)
Minimum bend
radius
R5 mm R2 mm R25 mm R10 mm
Fiber length 2 m (free-cut)
Material
Main unit Polyetherimide PBT Polysulfon
Fiber Plastic (polyethylene coating *5 )
Weight Approx. 23 g Approx. 20 g Approx. 7 g
Accessory
Cable tie
(W2.5 x H1.1 x
L203) x 2
Nonslip rubber
tubes x 2
Fiber
Cutter x 1
Fiber
Cutter x 1
*6
Cable tie (W3.6 x H1.1 x L142) x 2,
Nonslip rubber tubes x 2, Spacer ( 5 x 6) x 2,
Screw (M3 x 20) x 2, Hexagonal nut (M3) x 2,
Fiber cutter x 1, Adapter B x 1
2008
00241E 1112-2 96M00241