MK18 Series
Cylindrical
Reed Sensors
MEDER electronic
DESCRIPTION
MK18 sensors are magnetically operated Reed
proximity switches in a cylindrical module, fitted with
interconnect cable. The sensor should be mounted
on a fixed surface with the actuating magnet on
the moving surface. Introduction or removal of the
magnetic field determines the closing and opening
of the Reed Switch.
APPLICATIONS
•
Position and limit switch
•
Pneumatic or hydraulic actuator position Indica-
tion and end travel limit switch
•
Door and window contacts
Security system applications
•
Level sensor
Use with magnetic floats for water level detec-
tion in coffee makers, washing machines or
dishwashers
•
•
•
•
•
FEATURES
Flat side indicates maximum sensitivity
Small size
Other cables, connectors and colors available
Three operate sensitivities available
A choice of cable terminations and lengths are
available
All dimensions in mm [inch]
DIMENSIONS
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264
MEDER electronic
MK18 Series
Cylindrical
Reed Sensors
ORDER INFORMATION
Series
MK18 -
Options
Magnetic
Sensitivity
X-
B, C, D
Cable
Length (mm)
XXX
100 *
Termination
X
W
Part Number Example
MK18 - C - 100
W
C
is the magnetic sensitivity
100
is the cable length (mm)
W
is the termination
* Other cable length available.
MAGNETIC SENSITIVITY
Sensitivity
class
Pull In
AT Range
B
C
D
10 - 15
15 - 20
20 - 25
For wire and termination details please consult factory.
TERMINATION
W
The cable cut length includes:
5 mm of wire stripped and tinned
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265
MK18 Series
Cylindrical
Reed Sensors
MEDER electronic
CONTACT DATA
All Data at 20° C
Contact Ratings
Switching Power
Switching Voltage
Switching Current
Carry Current
Static Contact Resistance
Dynamic Contact Resistance
Insulation Resistance across Contacts
Breakdown Voltage across Contact
Operate Time incl. Bounce
Release Time
Capacitance
Contact Operation *
Must Operate Condition
Must Release Condition
Environmental Data
Shock Resistance
Vibration Resistance
Ambient Temperature
Stock Temperature
Soldering Temperature
1/2 sinus wave duration 11 ms
From 10 - 2000 Hz
10°C/ minute max. allowable
10°C/ minute max. allowable
5 sec. dwell
-20
-20
30
20
70
70
260
g
g
o
Contact Form
→
Conditions
Any DC combination of V & A not to
exceed their individual max.‘s
DC or peak AC
DC or peak AC
DC or peak AC
w/ 0.5 V & 10 mA
Measured w/ 0.5 V & 50 mA ,
1.5 ms after closure
100 volts applied
Voltage applied for 60 sec. min.
Measured w/ 100 % overdrive
Measured w/ no coil suppression
at 10 kHz cross contact
10
9
230
Form A
Min.
Typ.
Max. Units
10
200
0.5
0.5
150
200
W
V
A
A
mΩ
mΩ
Ω
VDC
0.6
0.1
0.2
ms
ms
pF
Steady state field
Steady state field
10
4
25
22
AT
AT
C
C
C
o
o
Please note: The indicated electrical data are maximum values and can vary downwards when using a more
sensitive switch.
* These ranges refer to the uncut / unmodified Reed Switches described in our Reed Switch section. Consult factory if
more detail is required.
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266
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