PF2D520-13-1 SMC Corporation of America, PF2D520-13-1 Datasheet - Page 12

• Manufacturer Part Number: PF2D520-13-1
• Description: SENSOR FLOW CHEM 1.8-20L/MIN
• Manufacturer: SMC Corporation of America
• Series: PF2Dr

Specifications of PF2D520-13-1

• Sensing Range: 1.8 ~ 20 LPM
• Flow Sensor Type: Liquid
• Voltage - Input: 12 ~ 24 V
• Port Size: Female, 1/2", 0.5" (12.7mm) NPT
• Material - Body: Steel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Switch Function/rating: -
• Other names: 606-1040

1. Perform periodical inspections to ensure
2. Take precautions when using the switch for an
3. Do not disassemble or perform any conversion
1. Check regulators and flow adjustment valves
2. The fluids that the switch can measure
3. Never use flammable fluids.
4. Install a filter or mist separator on the
5. The fluid that the switch can measure
16-11-34
Temperature
compensation element
A heated thermistor is installed in the passage, and fluid absorbs heat from
the thermistor as it is introduced to the passage. The thermistor's resistance
value increases as it loses heat. Since the resistance value increase ratio
has a uniform relationship to the fluid velocity, the fluid velocity can be
detected by measuring the resistance value. To further compensate the fluid
and ambient temperature, the temperature sensor is also built into the switch
to allow stable measurement within the operating temperature range.
Detection principle of digital flow switch for air
proper operation of the switch.
Unexpected malfunctions may cause possible danger.
interlock circuit.
When a pressure switch is used for an interlock circuit, devise
a
malfunctioning, verify the operation of the switch and interlock
function on a regular basis.
work on flow switches.
before introducing the fluid.
If pressure or flow rate beyond the specified range are applied
to the switch, the sensor unit may be damaged.
[For air]
accurately are nitrogen and dry air. However,
only dry air can be measured with the high
flow rate type.
Please note that accuracy cannot be guaranteed when other
fluids are used.
The flow velocity sensor heats up to approximately 150°C.
upstream side when there is a possibility of
condensate and foreign matter being mixed in
with the fluid.
The rectifying device built into the switch will be clogged up
and accurate measurement will no longer be possible.
[For water]
accurately is water.
Please note that accuracy cannot be guaranteed when other
fluids are used.
Warning
Warning
multiple
Fluid velocity
detection element
interlock
Series
Specific Product Precautions 3
Be sure to read before handling.
Measured Fluid
Maintenance
system
PF2A/PF2W
to
This flow switch uses
as the flow rate indicator
unit. The mass flow is
converted and displayed
under the conditions of 0°C
and 101.3 kPa.
The conversion conditions
can be switched to 20°C
and 101.3 kPa with high
flow type switches.
prevent
trouble
l
/min
or
1. Since switch output remains OFF while a
2. Perform
3. Do not apply excessive rotational force to the
4. Be certain to turn on the power when the flow
5. Flow rate unit
Detection principle of digital flow switch for water
When an elongated object (vortex generator) is placed in the flow,
reciprocal vortexes are generated on the downstream side. These vortexes
are stable under certain conditions, and their frequency is proportional to
the flow velocity, resulting the following formula.
f: Frequency of vortex v: Flow velocity k: Proportional constant
(determined by the vortex generator's dimensions and shape).
Therefore, the flow rate can be measured by detecting this frequency.
6. Never use flammable fluids.
7. Install a filter on the inlet side when there is a
Fluid
message is displayed after the power is turned
on, start measurement after a value is
displayed.
systems.
When the switch’s initial setting and flow rate setting are
performed, output maintains the condition prior to the settings.
With the 100, 200, and 500
turns OFF when the switch’s initial setting and flow rate setting
are preformed.
display unit.
The integrated type display unit can rotate 360°. Rotation is
controlled by the stopper; however, the stopper may be
damaged if the display unit is turned with excessive force.
[For air]
rate is at zero.
Allow an interval of 10 minutes after turning on the power, as
there are some changes in the display.
Switch measures at mass flow rates without being influenced
by temperature and pressure. The switches use
flow rate indicator unit, in which the volumetric flow is
substituted for mass flow at 0°C and 101.3 kPa. The
volumetric flow rate at 20°C, 101.3 kPa, and 65% RH (ANR)
can be displayed with the high flow rate type switches for air.
possibility of condensate and foreign matter
being mixed in with the fluid.
If foreign matter adheres to the switch’s vortex generator or
vortex detector, accurate measurement will no longer be
possible.
Vortex generator
Warning
Warning
settings
Measured Fluid
Vortex detector
f = k x v
∗ Top view
Others
after
l
/min type switches for air, output
stopping
l
/min as the
control