M300 Underspeed Switch: Reliable Detection of Slippage and Elevator Stoppage

Looking for a reliable M300 underspeed switch? M300 Underspeed Switch from 4B Braime Components (UK) is a compact sensor for detecting shaft, bucket, or conveyor roller speed below 20% of nominal. It instantly signals belt slip, partial stop, or overload, triggering emergency shutdown. Ideal for grain elevators, feed mills, flour mills, and port terminals, ensuring safety and minimizing downtime.

Advantages of M300 4B Underspeed Sensor

Why choose M300 Underspeed Switch 4B Braime?

• Fast detection: Responds to speed drop below 20% in 1–2 seconds, adjustable threshold 10–80%.

• Contactless principle: Magnetic sensor with Whirligig, no wear, ±1 rpm accuracy.

• Environment resistance: IP67 housing, -40°C to +80°C, ATEX Zone 20/21 dust.

• Easy integration: SPDT relay (250 V / 5 A), PNP/NPN, PLC/SCADA compatible.

• Savings: Prevents accidents, reduces downtime by 90%, payback — 3–6 months.

How M300 Underspeed Sensor Works

The M300 sensor mounts near the shaft with Whirligig disc. At normal speed (e.g., 300 rpm), relay is closed. On slippage (<60 rpm), relay opens, signaling controller for stop. This protects against:

• Belt or chain breakage

• Bucket fall into shaft

• Overheating from low speed

Main M300 Models

M300 Standard — Base Relay Version

Magnetic sensor with SPDT relay. Range: 10–3000 rpm. Threshold: 20–80%. Ideal for standard elevators. Protection: IP67, ATEX.

M300 PNP — Transistor Output Variant

Additional PNP/NPN for PLC. Same range, faster response <1 s.

Compatibility with 4B Systems

Integrates with Watchdog™, Milli-Speed, M800 Elite, T500. Modbus option supported.

Application Areas

Ideal for:

• Grain elevators (50–500 t/h)

• Feed mills

• Flour milling complexes

• Ports with conveyors

• Bulk material warehouses

Installation on Elevator

On drive shaft, M300 monitors bucket rotation. Moisture slippage — DCS signal, feed block. Easy 30-min install.

Use on Conveyor

For belt lines, sensor tracks drum. Speed drop — line emergency stop.

Technical Specifications

• Detection type: Magnetic, contactless

• Range: 10–3000 rpm

• Activation threshold: 10–80% of nominal

• Output: SPDT relay (250 V / 5 A), PNP/NPN

• Power: 10–30 V DC

• Protection: IP67, ATEX Zone 20/21

• Temperature: -40°C … +80°C

• Material: AISI 304 stainless steel

Certification

• ATEX Zone 20/21 (explosive dust)

• IECEx, DSTU

• Compliance certificates

Warranty & Service

• 24-month warranty

• Official 4B distributor in Ukraine — KCK.ua

• Installation, commissioning, staff training

Order M300 underspeed switch from KCK.ua with delivery across Ukraine (Kyiv, Kharkiv, Odesa, Dnipro, Lviv). Ensure slippage control for reliable operation.

Prevent downtime — order now! Order: +38 (044) 494-33-55 | kck@kck.ua

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