Kobold SMN-5150C – SMN All-Metal Flow Switch for Liquids, Brass, 1″ NPT, Conduit Connection
The Kobold SMN-5150C is an all-metal flow switch for liquids from Kobold’s SMN series, with a brass body, a 1″ NPT female process connection and a reed contact. Its electrical connection is a DIN 43650 plug with a 1/2″ NPT conduit fitting. It combines a very low switch point with minimal pressure loss at high flow rates, and it withstands high pressures.
The “C” version is designed for installations where wiring runs in electrical conduit, which is standard practice in North America and in many industrial plants. The conduit fitting connects directly to the conduit system, protecting the cable mechanically. The switch works on the float principle: a float with an integral magnet is pushed by the flow and operates the reed contact at the switch point. At higher flows an additional flow path opens, so the pressure drop stays low. When the flow falls, the float is returned by an opposing magnetic field.
Key Technical Data – Kobold SMN-5150C
- Series: Kobold SMN all-metal flow switch
- Body and wetted parts: Brass
- Process connection: 1″ NPT, female
- Switching range: ON 0.4–13 GPM; OFF 0.25–1 GPM (water)
- Media: Water or water-like, low-viscosity liquids
- Mounting: Vertical (upward flow) or horizontal
- Max. temperature: 100 °C (212 °F)
- Max. pressure (brass): 250 bar (approx. 3,600 psi)
- Contact: Reed contact, normally open
- Contact rating: max. 240 V AC / 0.42 A / 100 W
- Electrical connection: DIN 43650 plug with 1/2″ NPT conduit fitting
- Approval: cCSAus
Options and Related Models
- SMN-5150C: brass, 1″ NPT, NO contact, conduit connection (this item)
- SMN-5150: same switch with cable gland
- SMN-5150U: SPDT changeover contact with cable gland
- SMN-5150 CU: SPDT contact with conduit connection
- SMN-5250: stainless steel version
Contact type, electrical connection and material must match the original installation. Our sales team can help you confirm the right version.
Typical Applications
- No-flow alarms in cooling water circuits with conduit wiring
- High-pressure cleaning equipment
- Heating and effluent systems
- Replacement flow switches for installed SMN systems
Buy Kobold SMN-5150C from Atlantech Drives
- Fast sourcing, shipped worldwide
- 12-month warranty
- Senior commercial advice on flow switch versions and lead time
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