Meder Electronic MK7 Series Cylindrical Reed Sensors with M8 Thread DESCRIPTION MK7 sensors are magnetically operated Reed proximity switches in a cylindrical form with an 8 mm x 0.75 thread and connecting cable or coupler. The sensor can be screwed directly onto a fixed surface with the actuating magnet on the moving surface. The MK7 series is compatible with several inductive and magnetic proximity sensors. 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 • 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 switch terminations and cable lengths are available DIMENSIONS All dimensions in mm [inches] www.willow.co.uk Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 MK7 Series Meder Electronic Cylindrical Reed Sensors with M8 Thread ORDER INFORMATION SERIES CONTACT FORM SWITCH MODEL MAGNETIC SENSITIVITY CABLE LENGTH (mm) TERMINATION MK7 - XX XX X - XXX X 71 B, C, D, E 81 A 1 Form A OPTIONS 500 * MK7 - 1A71 C - 500 W, X, Y 51 1 Form B 1 Form C Part Number Example 1A is the contact form 71 is the switch model C is the magnetic sensitivity 500 is the cable length (mm) W is the termination C, D, E 90 * Other cable lengths available. MAGNETIC SENSITIVITY SENSITIVITY CLASS PULL IN AT RANGE A 5 - 10 B 10 - 15 C 15 - 20 D 20 - 25 E 25 - 30 TERMINATION For wire and termination details please consult factory. Form C version requires 3 conductors. www.willow.co.uk Tel. +44 (0) 1342 835234 W Fax. +44 (0) 1342 834306 Meder Electronic MK7 Series Cylindrical Reed Sensors with M8 Thread CONTACT DATA Switch Model --> Contact Form --> All data at 20 0 C Contact Ratings Conditions Contact 51 Form A Min. Typ. Max. Contact 71 Form A Min. Typ. Max. Units Contact Rating Any DC combination of V & A not to exceed their individual max.'s 12 10 W Switching Voltage DC or peak AC 250 200 V Switching Current DC or peak AC 0.5 0.5 A Carry Current DC or peak AC 1.5 1.25 A Static Contact Resistance w/ 0.5V & 10mA 150 150 mΩ Dynamic Contact Resistance Measured w/ 0.5V & 50mA 1.5 ms after closure 200 200 mΩ Insulation Resistance across Contacts 100 Volts applied 1011 1010 * Ω Breakdown Voltage across Contacts Voltage applied for 60 sec. min. 350 225 * VDC Operate Time, incl. Bounce Measured w/ 100% overdrive 1.0 0.5 ms Release Time Measured w/ no coil suppression 0.1 0.1 ms Capacitance @ 10kHz across contact 0.2 0.2 pF Contact Operation ** Must Operate Condition Steady state field 15 30 10 30 AT Must Release Condition Steady state field 6 27 4 27 AT Environmental Data Shock Resistance 1/2 sine wave duration 11ms 50 50 g Vibration Resistance From 10 - 2000 Hz 20 20 g Ambient Temperature 10 0 C/ minute max. allowable 0 Storage Temperature 10 C/ minute max. allowable Soldering Temperature -20 -35 5 sec. dwell 85 85 -20 -35 260 85 0 85 0 260 0 C C C 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 / 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 MK7 Series Meder Electronic Cylindrical Reed Sensors with M8 Thread CONTACT DATA Switch Model --> Contact Form --> All data at 20 0 C Contact Ratings Conditions Contact 81 Form A Min. Typ. Contact 90 Form B / C Max. Min. Typ. Max. Units Contact Rating Any DC combination of V & A not to exceed their individual max.'s 5 3 W Switching Voltage DC or peak AC 90 175 V Switching Current DC or peak AC 0.5 0.25 A Carry Current DC or peak AC 1.0 1.2 A Static Contact Resistance w/ 0.5V & 10mA 200 150 mΩ Dynamic Contact Resistance Measured w/ 0.5V & 50mA 1.5 ms after closure 200 250 mΩ Insulation Resistance across Contacts 100 Volts applied 109 109 Ω Breakdown Voltage across Contacts Voltage applied for 60 sec. min. 100 200 VDC Operate Time, incl. Bounce Measured w/ 100% overdrive 0.5 0.7 ms Reset Time Measured w/ no coil suppression 0.1 1.5 ms Capacitance @ 10kHz across contact 0.2 1.0 pF Contact Operation ** Must Operate Condition Steady state field 5 10 15 30 AT Must Reset Condition Steady state field 2 9 6 27 AT Environmental Data Shock Resistance 1/2 sine wave duration 11ms 30 50 g Vibration Resistance From 10 - 2000 Hz 10 20 g Ambient Temperature 10 0 C/ minute max. allowable Storage Temperature Soldering Temperature 0 10 C/ minute max. allowable -20 -35 5 sec. dwell 85 85 -20 -35 260 85 0 85 0 260 0 C 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