Shenzhen Jiwei Automations Ltd.
Address：5th Floor, Baoli Building, No. 3162 Longgang Avenue, Shenzhen, P. R. China.
Tel：+86 755 28407683
SW-21 Compact Magnetic Switch
Same as SW-11 Magnetic Switch, SW-21 is also an ideal accessory when combined with Flap-11 Magnetic Level Indicator for remote alarm and control.
● It is skillfully configured, compact and lightweight.
● Purchased high quality high-power reed switch with higher current rating and longer service time as its key parts in international market.
● Made of 304 stainless steel for strong corrosion resistance and durability.
● Approved for explosion proof certifications, including Flameproof Enclosure (Ex d IIC T6) and Intrinsic Safety (Ex ia IIC T6).
● With high Ingress protection level IP66/IP67.
- The compact and
lightweight are the most prominent features of SW-21 Compact Magnetic Switch
(with 35mm in width and 120mm in length). SW-21 has been approved for dual
explosion-proof certifications (Flameproof Enclosure: Ex d IIC T6 and Intrinsic
safety: Ex ia IIC T6). And high quality high-power reed switch is used as its core component. Jiwei holds a utility patent (NO. 201821348285.8)
on SW-21. SW-21 is used with Flap-11 Magnetic Level Indicator for remote
alarm as well. The magnetic float in the chamber rises or falls with the
up and down of the liquid level in the vessel. When the magnetic float
approaches the magnetic switch, the permanent magnetic steel in the magnetic
float triggers the reed switch in SW-21 to change its open/close status. The
state of the reed is locked by the internal magnetic mechanism to fulfill the alarm
SW-21 Compact Magnetic Switch is designed with a single-pole double-throw (SPDT) reed switch. It supports three types of output: (1)SPDT closed or open, (2)initial open and closed hold and (3)initial closed and open hold for overflow or dry-run alarm and protection.