German KOBOLD all metal flow switch SMV-3108HR0R08

German KOBOLD all metal flow switch SMV-3108HR0R08

German KOBOLD all metal flow switch SMV-3108HR0R08Used for liquid/gas flow monitoring and switch control. The SMV series is a fully metal float type flow switch suitable for high voltage conditions, with strong safety.coreVariable area float+Magnetic coupling reed switch，By driving the float up and down with flow and triggering the switch with magnetic force, flow monitoring and alarm can be achieved.

1、 Core structure

Measuring tube: cylindrical, with a conical V-shaped groove on the tube wall, replacing traditional conical tubes.

Float: Built in**Magnet, floating up and down inside the measuring tube; There is a constant annular gap between the float and the pipe wall, which has strong anti fouling properties.

Switch unit: a bistable reed switch with adjustable height outside the tube, isolated from the basic.

No spring/diaphragm: reset by gravity+magnetic force, long service life, high pressure resistance.

2、 Working process (flow electrical signal)

No traffic/low traffic
The float stops at the bottom of the measuring tube under the action of gravity, and its magnetic field is far away from the reed switch, which remains in the * * OFF (NO) * * state.
The flow increase switch is closed
The fluid flows from bottom to top, pushing the float to rise against gravity.
When the float rises to the set switch point, the internal magnetic field triggers the external reed switch of the tube, causing it to close (ON) and output an electrical signal of "flow rate meets the standard".

The flow continues to increase and remains closed
The float continues to rise with the flow rate until it reaches the top limit; Due to the use of a bistable design, as long as the float is within the triggering range, the switch will continue to close without false tripping.
The flow decrease switch is disconnected
The flow rate decreases, and the float falls back under the action of gravity.
When it drops below the switch point, the magnetic field disengages from the reed switch, the switch opens (OFF), and outputs a "insufficient flow" signal.
3、 Key principle characteristics

Magnetic coupling isolation: The switch is located outside the tube, sealed and isolated from the medium, with no leakage and strong corrosion resistance.

V-groove+annular gap: Compared to traditional conical pipes, it has better pollution resistance, lower pressure loss, and more stable float operation.

Bistable switch: maintains the state after triggering, does not frequently jump when the flow fluctuates, and the signal is stable.

All metal pressure resistant: Made of brass/stainless steel, with a pressure resistance of 350 bar, suitable for high-pressure hydraulic, lubrication, and cooling systems.

No vulnerable partsWithout springs or membranes,Long lifespan and minimal maintenance.

German KOBOLD all metal flow switch SMV-3108HR0R08

four、Typical application scenarios of all metal flow switches

1. Hydraulic system

Flow monitoring of cooling circuit in hydraulic station

Is there flow protection in the main hydraulic oil circuit/branch

Prevent the oil pump from idling or being damaged due to lack of oil

2. Lubrication system

Gearbox, bearings, and main shaft forced lubrication

Insufficient lubricating oil flow alarm/shutdown

Machine tool, reducer, fan, motor lubrication monitoring

3. Machine tool and cooling system

Monitoring of cutting fluid and coolant circulation

Spindle cooling and tool cooling protection

Prevent tool burning and spindle overheating caused by interruption of flow

4. Injection molding machine/die-casting machine/molding equipment

Mold cooling water flow monitoring

Oil temperature control circuit protection

Equipment overload and overheating protection

5. Compressor, vacuum pump, fan

Lubricating oil flow monitoring

Cooling water circuit monitoring

Prevent oil shortage from burning the machine

6. Generator set and engine

Diesel/gas engine cooling water flow rate

Lubricating oil flow protection

Backup power unit safety interlock

7. Water treatment, chemical industry, high temperature and high pressure liquids

Industrial cooling water system

Filter system flow monitoring

High temperature oil, hot water, and slightly corrosive liquids

8. Metallurgy, heavy industry, and engineering machinery

Hydraulic and lubrication system for large equipment

Cooling circuit for mining machinery and metallurgical equipment

Poor working conditions, high dust and vibration environment