ESMFS 10w/50w PP Material Connecting Rod Float Level Switch probe for Pump Control

It is mainly based on Archimedes' buoyancy principle. When the liquid level changes, the float moves up or down with the liquid level, driving the switch through lever transmission or magnetic coupling to achieve the opening and closing of the circuit. Among them, the mechanical contact float switch directly drives the mechanical contacts to open or close through a lever; the magnetic float switch uses the magnetic force between the magnet inside the float and the reed switch to control the closing and opening of the reed switch.

Integrated Vertical Guide Rod:
The main body is a long straight PP tube, internally encapsulating three sets of independent reed switches at predetermined intervals.
Externally, there are three separate annular PP float balls, each embedded with a magnet, which can freely slide up and down the guide rod without interfering with each other.
Three-Point Independent Detection:
High-Level Float (H): Typically used for high liquid level alarm (overflow prevention) or stopping the second-stage pump.
Medium-Level Float (M): Typically used for normal liquid level control (such as starting/stopping the main pump, maintaining water level range).
Low-Level Float (L): Typically used for low liquid level alarm (dry-run prevention) or starting the makeup water pump.
Signal Output:
Typically, 4 wires are led out (1 common terminal COM and 3 signal lines H/M/L) or 6-7 wires (three sets of independent contacts, each set with 2 wires for common ground).
The operation logic of each float (Normally Open NO / Normally Closed NC) can be individually set at the factory according to requirements.

1. Excellent chemical resistance:
PP (polypropylene) has excellent resistance to acids, alkalis, and salt solutions.
Suitable for: plating solutions, cleaning solutions, wastewater treatment, chemical additives, seawater, and other corrosive media (better than ABS, slightly inferior to PVDF, but with the best cost-performance ratio).

2. Food-grade safety:
Meets food contact standards, non-toxic and tasteless.
Suitable for: drinking water tanks, food and beverage containers, purified water equipment.

3. Lightweight and durable:
Low density (about 0.9 g/cm³), high buoyancy, can drive reed switches even with small-volume float designs.
Good impact resistance, not easy to crack.

4. Cost advantage:
Compared with stainless steel (SUS304/316) and PVDF, PP material is extremely low cost, making it the first choice for large-scale civil and general industrial applications.