Meder Electronic MK20 Series Cylindrical Reed Sensors DESCRIPTION MK20 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 • Various case sizes available • Three operate sensitivities available • A choice of cable terminations and lengths are available DIMENSIONS All dimensions in mm [inches] www.willow.co.uk Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 MK20 Series Meder Electronic Cylindrical Reed Sensors ORDER INFORMATION SERIES MAGNETIC SENSITIVITY CABLE LENGTH (mm) TERMINATION MK20 - X - XXX X OPTIONS B, C, D 100 * W, X, Y Part Number Example MK20 - C - 100 W C is the magnetic sensitivity 100 is the cable length (mm) W is the termination * Other cable lengths 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. www.willow.co.uk Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Meder Electronic MK20 Series Cylindrical Reed Sensors CONTACT DATA All data at 20 0 C Contact Form --> Contact Ratings Conditions Form A Min. Typ. Max. Units 5 W Contact Rating Any DC combination of V & A not to exceed their individual max.'s Switching Voltage DC or peak AC 175 V Switching Current DC or peak AC 0.25 A Carry Current DC or peak AC 0.5 A Static Contact Resistance w/ 0.5V & 10mA 300 mΩ Dynamic Contact Resistance Measured w/ 0.5V & 50mA 1.5 ms after closure 400 mΩ Insulation Resistance across Contacts 100 Volts applied 109 Ω Breakdown Voltage across Contacts Voltage applied for 60 sec. min. 200 VDC Operate Time, incl. Bounce Measured w/ 50% overdrive 0.4 ms Release Time Measured w/ no coil suppression 0.1 ms Capacitance @ 10kHz across contact 0.3 pF Contact Operation * Must Operate Condition Steady state field 10 25 AT Must Release Condition Steady state field 4 22 AT g Environmental Data Shock Resistance 1/2 sine wave duration 11ms 30 Vibration Resistance From 10 - 2000 Hz 20 0 g Ambient Temperature 10 C/ minute max. allowable -20 70 0 Storage Temperature 10 0 C/ minute max. allowable -20 70 0 C Soldering Temperature 5 sec. dwell 260 0 C 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.willow.co.uk Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306