FM-328, Standard Ferro-magnetic Metal Detection Sensor
Features
Actuates with Any Ferrous Metal. 10W Contact Rating. Normally Open contact. Sputtered Ruthenium Contact. Easy Screw Mounting.
Description
This screw mountable sensor can be mounted with M3 screws and can switch moderate loads of 10W. It can be actuated on the actuating side as shown below, by any Ferro-magnetic material that is longer than the length of the sensor. Actuation distance is 3.0 – 8.0 mm and Release distance is 4.0 – 10.0 mm. Unlike other standard Magnet Sensors, an actuating magnet is not require. All sensors are tested 100% for actuating distance before packing. Click to download this product data sheet as a PDF.
| Operate Distance | mm | 3.0 – 8.0 |
| Release Distance | mm | 4.0 – 10.0 |
Electrical
| 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) | VDC | 100 |
| Breakdown Voltage (min) | VDC | 150 |
| Contact Resistance (max) | mΩ | 150 |
| Insulation Resistance (min) | Ω | 109 |
| Capacitance (typ) | pF | 0.2 |
Miscellaneous
| Operate Time (max) | ms | 0.35 |
| Bounce Time (max) | ms | 0.30 |
| Release Time (max) | ms | 0.15 |
| Resonance Frequency (typ) | Hz | >2000 |
| Operating Frequency (max) | Hz | 500 |
| Operating Temperature Range | °C | -40 to +70 |
| Shock Resistance (½Sin wave for 11ms) | G | 30 |
| Vibration Resistance (10-2000 Hz) | G | 20 |
Ordering Code
FM-328-(Cable Length)-(Cable Termination Code)
| Cable Termination Code | Termination Type |
| S | Stripped to 5.0 mm |
| T | Stripped and Tinned |
FM-328-500-S Denotes FM-328 Sensor having 500 mm cable length with leads Stripped to 5 mm.
Other Special Configurations: Dynamic Contact Resistance Limit, Special Release AT Limits.
Usage Notes
Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.
Product Handling
 |
Reed Switch Handling Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro cracks in the glass
Continue reading
Aug 31, 2020 |
Ferro-magnetic parts
 |
Reed Switches use an alloy of Nickel and Iron with a few other elements that make the alloy Ferro-magnetic and having a low Remanence.
Continue reading
Sep 4, 2019 |
Cable Handling
 |
Magnet Sensor Cable Handling When using Reed Switches soldered to cables, or when using off the shelf Magnet Sensors with cables, some
Continue reading
Sep 4, 2019 |
Reed Contact Protection Circuits
 |
It is assumed that the ideal reed switch load is a Resistive Load, but it is almost impossible to reduce any load to purely resistive.
Continue reading
Aug 31, 2020 |
Applications
Although we can never restrict the use of a reed sensor to a particular field, the following is a list of some of the applications that the FM-328 Ferrous Metal Detection Sensor is known to perform well.
Reed Sensors to Prevent Thievery in Cargo Containers
 |
Containerized Cargo Cargo theft is an international problem and hundreds of millions of dollars of goods are lost due to pilferage and
Continue reading
Nov 7, 2020 |
Reed switches in Ferrous part detection
 |
Pick and Place Robot For a cost effective solution to be used in heave machine automation where magnets cannot be used due to the sheer
Continue reading
Nov 7, 2020 |
Magnet Sensors for Door and window Security
 |
Door/Window Security Home and Workspace security is paramount and most newly constructed spaces integrate security products during
Continue reading
Nov 6, 2020 |