Ultra Miniature Miniature Standard NC Latching Miniature SIP Standard SIP Level Sensor Distances Crosslink Notes

Magnets
Test Coils
Lead Free

Protection
AT Band FAQ

Usage Notes

SMD Soldering

Reed Glossary

MK-xxxx PCB Mountable Reed Sensor with Integrated Resistor

Does not require power for operation

Normally open (NO) form A contact

Omni-polar device; actuates with either pole of magnet

Various wattages and resistor values

Two magnetic sensitivity bands

Ideal for level sensing applications

RoHS Compliant and Lead-free

This reed sensor is built with an internal resistor which can either be used for level sensing applications or for contact protection. A diode can also be put in place of the resistor and the dot marked on the sensor can be used to denote the polarity. Various activating distances are available depending on the magnet and the AT band used. The sensors are tested 100% for operate and release AT, contact resistance and variable contact resistance before packing. Our products are completely Lead-free and conform to the RoHS directive.

Reed Sensor with Integrated Resistor Drawing

All dimensions in mm

Download this data sheet View actuation distances

Applications

This reed sensor is suitable for use in the following applications and in many others: fluid level sensing, contact protection, resistance matrixes...

Specifications

Contact Form		A
Contact Rating (max)	W / VA	10.0
Switching Current (max)	A	0.5
Carry Current (max)	A	0.75
DC Switching Voltage (max)	V DC	100
Breakdown Voltage (min)	V DC	150
Initial Contact Resistance (max)	mΩ	150
Operating Temperature	°C	-40 to +140
Shock Resistance (½Sin wave for 11ms)	g	30
Vibration Resistance (10-2000Hz)	g	20

Ordering Code

MK-(Resistor Value)-(Operate AT Code)

OAT Code	AT Band
1	10 - 15
2	15 - 20

Resistor value in ordering code refers to standard integrated resistor (1/8 W, 1% tolerance).

Operate AT bands indicated above are for unmodified reed switch.

Example

MK-0120-1

Denotes 10-15 Operate AT, with 120 ohms resistor

Other Special Configurations Available

Gold plated leads

Different plastic encapsulation

Possible Magnet Actuations

Level Sensor Magnet Actuation Examples

A few examples of magnet actuation are shown above. Being an omnipolar device, this sensor can be actuated with either a north pole or a south pole or both. Choosing the right AT band, magnet strength, and operating axis, will restrict the number of operates and releases to one. A ring magnet can also be used around the sensor, for use in float applications. Click here to view actuation distances of this sensor with the standard magnets.

Ultra Miniature Miniature Standard NC Latching Miniature SIP Standard SIP Level Sensor Distances Crosslink Notes

Reed Relays and Electronics India Limited, 2008

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