293
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MEDER electronic
Reed Sensors
for Screw Fastening
DESCRIPTION
MK26 sensors are magnetically operated Reed
proximity switches designed for screw mounting.
The sensor should be mounted on a xed surface
with the actuating magnet on the moving surface.
Introduction or removal of the magnetic eld
determines the closing and opening of the Reed
Switch.
APPLICATIONS
• Position and limit switch
Pneumatic or hydraulic actuator position
indication and end travel limit switch
• Door and window contacts
Security system applications
• Level sensor
Use with magnetic oats for water level
detection in coffee makers, washing
machines or dishwashers
DIMENSIONS
All dimensions in mm [inch]
FEATURES
Form A, B, and C available
High power switches available
Other cables, connectors and colors available
Various case sizes available
Five operate sensitivities available
A choice of cable terminations and lengths are
available
High voltage versions upon request
•
•
•
•
•
•
•
MK26 Series
32±0.3
24±0.25
46
6.4
ø 3.3
4.4
6.5
10
3.3
[0.26]
[0.39]
[0.13]
[1.26±0.012]
[0.94±0.01]
[0.16] [0.24]
[0.13]
[0.25]
[0.17]
294
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MEDER electronic
MK26 Series
MAGNETIC SENSITIVITY
TERMINATION
Part Number Example
MK26 - 1A66 C - 500 W
1A is the contact form
66 is the switch model
C is the magnetic sensitivity
500 is the cable length (mm)
W is the termination
ORDER INFORMATION
For wire and termination details please consult factory.
Form C version requires 3 conductors.
Series Contact
form
Switch-
model
Magnetic
Sensitivity
Cable
Length
(mm)
Termina-
tion
MK4 - XX XX X - XXX X
Options
1 Form A 66 B, C, D, E
500* W
1 Form B
1 Form C 90
* Other cable length available.
Sensitivity
Class
Pull In
AT Range
B 10 - 15
C 15 - 20
D 20 - 25
E 25 - 30
W
The cable cut length includes:
5 mm of wire stripped and tinned
Reed Sensors
for Screw Fastening
295
www.meder.com
MEDER electronic
Reed Sensors
for Screw Fastening
CONTACT DATA
MK26 Series
All Data at 20° C Switch Model →
Contact Form →
Switch 66
Form A
Contact Ratings Conditions Min. Typ. Max. Units
Switching Power Any DC combination of V & A not
to exceed their individual max.‘s 10 W
Switching Voltage DC or peak AC 200 V
Switching Current DC or peak AC 0.5 A
Carry Current DC or peak AC 1.25 A
Static Contact Resistance w/ 0.5 V & 10mA 150 mΩ
Dynamic Contact Resistance Measured w/ 0.5 V & 50mA ,
1.5 ms after closure 200 mΩ
Insulation Resistance across
Contacts 100 volts applied 1010
*Ω
Breakdown Voltage across
Contact Voltage applied for 60 sec. min. 225 * VDC
Operate Time incl. Bounce Measured w/ 100 % overdrive 0.5 ms
Release Time Measured w/ no coil suppression 0.1 ms
Capacitance at 10 kHz cross contact 0.2 pF
Contact Operation **
Must Operate Condition Steady state eld 10 60 AT
Must Release Condition Steady state eld 4 54 AT
Environmental Data
Shock Resistance 1/2 sinus wave duration 11 ms 50 g
Vibration Resistance From 10 - 2000 Hz 20 g
Ambient Temperature 10°C/ minute max. allowable -20 85 oC
Stock Temperature 10°C/ minute max. allowable -35 85 oC
Soldering Temperature 5 sec. 260 oC
Please note: The indicated electrical data are maximum values and can vary downwards when
using a more sensitive switch.
* Insulation resistance of 1012 and breakdown voltage of 480 VDC is available.
** These ranges refer to the uncut / unmodied Reed Switches described in our Reed Switch
section. Consult factory if more detail is required.
296
www.meder.com
MEDER electronic
MK26 Series
CONTACT DATA
All Data at 20° C Switch Model →
Contact Form →
Switch 90
Form B / C
Contact Ratings Conditions Min. Typ. Max. Units
Switching Power Any DC combination of V & A not
to exceed their individual max.‘s 20 W
Switching Voltage DC or peak AC 175 V
Switching Current DC or peak AC 0.5 A
Carry Current DC or peak AC 1.0 A
Static Contact Resistance w/ 0.5 V & 10mA 150 mΩ
Dynamic Contact Resistance Measured w/ 0.5 V & 50mA ,
1.5 ms after closure 250 mΩ
Insulation Resistance across
Contacts 100 volts applied 109Ω
Breakdown Voltage across
Contact Voltage applied for 60 sec. min. 200 VDC
Operate Time incl. Bounce Measured w/ 100 % overdrive 0.7 ms
Release Time Measured w/ no coil suppression 1.5 ms
Capacitance at 10 kHz cross contact 1.0 pF
Contact Operation **
Must Operate Condition Steady state eld 15 40 AT
Must Release Condition Steady state eld AT
Environmental Data
Shock Resistance 1/2 sinus wave duration 11 ms 50 g
Vibration Resistance From 10 - 2000 Hz 20 g
Ambient Temperature 10°C/ minute max. allowable -20 85 oC
Stock Temperature 10°C/ minute max. allowable -35 85 oC
Soldering Temperature 5 sec. 260 oC
Please note: The indicated electrical data are maximum values and can vary downwards when
using a more sensitive switch.
* Insulation resistance of 1012 and breakdown voltage of 480 VDC is available.
** These ranges refer to the uncut / unmodied Reed Switches described in our Reed Switch
section. Consult factory if more detail is required.
Reed Sensors
for Screw Fastening