20m
40m
{
L2
A1
A2
Reed Switch
K8
*
2K2 - 2W
A1+
A2-
Reed Switch
KD
*
+
+
D = 20 ~ 40m
22R 5W
R
K8
*
220R 5W
R
The sensors work in all voltage and current ranges displayed in the table bellow:
Operating Voltage
Max. Switching Power Max. Switching Current
Peak Current
110Vac
20VA
0.2A
0.5A @20ms
220Vac
20VA
0.1A
0.5A @20ms
5Vdc
2.5W
0.5A
1A @20ms
12Vdc
5W
0.5A
1A @20ms
24Vdc
10W
0.5A
1A @20ms
24Vac:
NOT recommended
AC Current:
Use
K8 Filter
*
in parallel with the coil (A1 A2) of a contactor or relay.
DC Current:
Use
KD Filter
*
in parallel with the coil (A1 A2) of a contactor or relay.
*
check models and prices of Filters and Mini Contactor
for
electrical installation (AC)
(included)
Term of Warranty
Operation
Typical Connection to Contactor
Electrical Contact of Sensors
-
Attention to Install
! Never connect the sensor
directly to a motor, pump,
lamp or any other load
over 20W.
Always use a contactor or
relay.
Manual
C.01/Oct2017
0.1µF 400V
*
For sale on
Flow Switches
Models for G 1/4” Port
IMPORTANT !
YOU MUST CHECK BEFORE INSTALLATION
For installations according to this guide:
02 (two) years warranty.
Incorrect installation cancels the warranty.
All Sensors have been tested and approved during the manufacture process.
Reed Switch 20W/VA: Protect the Electrical Contact of your Sensor
Siemens 3RT1015 Contactor
Initial: 31.7VA
Rated: 5.1VA
• Liquids with solid particles and/or fouling
require prior
testing. Use filter before the Sensor to prevent the internal piston
from locking. Not recommended for industrial water waste.
• Liquids with ferrous and/or magnetic particles
require
technical analysis: the Sensor contains magnetic components
inside. Use a magnetic filter before the Sensor to avoid
deposition/settling that will prejudice its operation.
Direct connection
to the
sensor
Use
22R 5W
*
resistor
in series
Use
24Vdc Voltage
•
AUXILIARY CONTACTOR (mini contactor) mind the distance:
•
SOLENOID VALVE or POWER CONTACTOR:
Use
mini contactor
or
auxiliary relay
.
•
ELECTRONIC EQUIPMENT:
›
Interface relay/relay coupler:
Use
4K7 10W resistor
.
›
Timing relay and frequency inverter:
Use
220R 5W
*
resistor
.
Follow the instructions below to protect and extend the shelf life of the sensor:
Questions? Call us BEFORE you install:
+55 (15)
3032.9190
|
K8
for AC
KD
for DC
Installing the snubber
filter extends the
lifespan of the sensor’s
electrical contact.
On
available technical specifications
+55 (15)
3032.9190
Reed Switches are hermetically sealed
contacts actuated by a magnetic field.
The life expectancy of a reed switch refers to a kind of load to be
used. Reed Switches of the highest reliability are applied in our
sensors, and their life expectancy can reach above two million
operations. However, when they are switching lamps, inductive or
capacitive loads, this number may decrease.
Switching Power
It is important to consider that the power specified by an electrical
load is often referred to the permanent working state.
For higher power, use an auxiliary relay or contactor as recommended
below, or similar.
Note:
Reed Switches have reached over one million operations in
tests with contactor and
PROTECTION PROCEDURES BELOW DESCRIBED CAN
IMPROVE THE REED SWITCH PERFORMANCE
Flow Switches and Level Switches for liquids
K8
*
Filter mounted in parallel
with the coil of an AC contactor,
increases the contact life.
KD
*
Filter mounted in parallel
with the coil of a DC relay,
increases the contact life.
Important
: For distances
greater than 40m
, use 24Vdc voltage.
•Timing relay
•Frequency inverter
•Etc.
Important
: For installation with
relay coupler
, use 4K7 10W resistor.
• Switching inductive loads
? Risk of failure (welding of the Reed Switch Contact)
due to CAPACITANCE, which
can occur depending on the distance and cable used in the connection to the contactor.
• Connecting the sensor to a contactor in long distances, use resistor:
This resistor dampens the peak voltage caused by the
capacitance of cables and electronic equipment input.
• Connecting the sensor to an electronic equipment:
BY448
or
1N4007
