The S3390 is a normally open magnetic proximity sensor with a threaded metallic case, hermetically sealed reed contact, and IP67 protection. It operates with a 230 VAC, 50 VA load at up to 0.5 A, and has a maximum switching frequency of 230 Hz. The sensor uses a 2 m cable with two 0.14 mm² conductors and is rated for operation from -25 to +100°C. Its nickel-plated brass case and compliance with RoHS and the EMC directive make it suitable for industrial environments. The operating distance depends on the associated magnet, as specified in Table 1.
Magnetic sensors are actuated by the presence of a permanent magnet. Their operating principle is based on the use of reed contacts, which consist of two low reluctance ferro-magnetic reeds enclosed in glass bulbs containing inert gas. The reciprocal attraction of both reeds in the presence of a magnetic field, due to magnetic induction, establishes an electrical contact.
| Fargo Controls, Inc. | |
|---|---|
| Product Category | Proximity Sensors |
| Product Number | S3390 |
| Product Name | Magnetic Proximity Sensor |
| Sensor Technology | Magnetic Proximity Sensor |
| Body Shape | Cylindrical; Threaded Barrel |
| Operation Distance | 0.3150 inch (8 mm) |
| Switching Frequency | 0.2300 kHz |
| Operating Temperature | -13 to 212 F (-25 to 100 C) |
