MEDER electronic MK20/1 Series Cylindrical Reed Sensors DESCRIPTION MK20/1 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 Indication and end travel limit switch • Door and window contacts Security system applications • Level sensor Use with magnetic floats for water level detection 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 DIMENSIONS All dimensions in mm [inch] 10 0.394 MK20/1 www.meder.com 267 MK20/1 Series MEDER electronic Cylindrical Reed Sensors ORDER INFORMATION Series Magnetic Sensitivity Cable Length (mm) Termination MK20/1 - x- xxx x Options B, C, D 100 * W Part Number Example MK20/1 - 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 10 - 15 C 15 - 20 D 20 - 25 TERMINATION For wire and termination details please consult factory. W The cable cut length includes: 5 mm of wire stripped and tinned www.meder.com 268 MEDER electronic MK20/1 Series Cylindrical Reed Sensors CONTACT DATA All Data at 20° C Contact Form → Contact Ratings Conditions Form A Min. Typ. Max. Unit Switching Power Any DC combination of V & A not to exceed their individual max.‘s 5 W Switching Voltage DC or peak AC 80 V Switching Current DC or peak AC 0.25 A Carry Current DC or peak AC 0.5 A Static Contact Resistance w/ 0.5 V & 10 mA 150 mΩ Dynamic Contact Resistance Measured w/ 0.5 V & 50 mA , 1.5 ms after closure 300 mΩ Insulation Resistance across Contacts 100 volts applied 109 Ω Breakdown Voltage across Contact Voltage applied for 60 sec. min. 200 VDC Operate Time incl. Bounce Measured w/ 100 % overdrive 0.4 ms Release Time Measured w/ no coil suppression 0.1 ms Capacitance at 10 kHz cross contact 0.3 pF Contact Operation * Must Operate Condition Steady state field 10 25 AT Must Release Condition Steady state field 4 22 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 70 o C Stock Temperature 10°C/ minute max. allowable -20 70 o C Soldering Temperature 5 sec. dwell 260 o C 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. www.meder.com 269