Datasheet

16
OUT
IN
IN
OUT
OUT
IN
Top
Not susceptible to bubbles Susceptible to bubbles
Under
Top
Under
Electrode
Display
Fluid passage
Uninstallable area
50 mm 50 mm
20 mm
20 mm
Be sure to read before handling. Refer to back cover for Safety Instructions, “Handling
Precautions for SMC Products” (M-E03-3) and Operation Manual for Flow Switch
Precautions. Please download it via our website, http://www.smcworld.com
Warning Warning
Design and Selection
Mounting
1. Piping port and the metal part of the body are
grounded to DC(-)/blue line.
Do not use the power supply with positive ground.
2. Avoid piping in which the piping size of the IN side
of the switch changes suddenly.
If the piping size is reduced sharply or there is a restrictor such
as a valve on the IN side, fluid velocity distribution in the piping
will be disturbed, leading to improper measurement. There-
fore, the above-mentioned piping should be connected on the
OUT side.
If the OUT side is opened, or flow rate is excessive, cavitations
may be generated, which may result in improper measure-
ment. As a measure against this, it is possible to reduce the
cavitations by increasing the fluid pressure. Take action such
as mounting an orifice on the OUT side of the switch, and
confirm that there is no malfunction before handling. If the
orifice of the OUT side is fully closed to operate the pump, the
switch may malfunction due to the effect of pulsation (pressure
fluctuation). Ensure that there is no malfunction before usage.
3. When multiple sensors are used in parallel, install
them outside of the area as shown below.
(Uninstallable area) If the product is mounted in the
area where installation is prohibited, the accuracy
will decrease.
1. Since the type of fluid varies depending on the
product, be sure to verify the specifications.
The switches do not have an explosion proof rating. To
prevent a possible fire hazard, do not use with inflammable
gases or fluids.
2. Design the system, so that the fluid always fills the
detection passage.
When the product is mounted
vertically, place the display
vertical to the floor to prevent
bubbles from occurring.
4. Use caution that the electrical entry for lead wire
with M12 connector does not rotate and is limited to
only one direction.
If the product is used when the
detection passage is not filled,
correct detection signal is not
output from the electrodes,
making correct measurement
impossible. Especially for ver-
tical mounting, introduce the
fluid from the bottom to the top
because bubbles may be gen-
erated when applying fluid
from the top to the bottom,
leading to operation failure.
Series LFE
Specific Product Precautions 1