The EFQS-H uses a welded stainless steel float and an internal microswitch to control filling or drainage as the liquid level changes. Silicone cable and tinned copper conductors support use in water, wastewater and compatible industrial liquids at temperatures up to 100°C.
SUS304 and SUS316 enclosure options allow material selection for the medium. Select a material compatible with the liquid and its concentration; mildly acidic or alkaline service depends on the actual chemical conditions.
| Parameter | Specification |
|---|---|
| Switching element | Three-terminal microswitch |
| Operating voltage and current limits | 220VAC maximum; 4A maximum |
| Working temperature | 0–100°C |
| Enclosure | SUS304 or SUS316 stainless steel |
| Cable | 0.5mm² tinned copper conductors with silicone insulation |
| Cable lengths | 2m, 3m, 4m, 5m, 6m, 8m, 10m or 15m; custom lengths available |
| Switching angles | −45° and +45°, with ±2° tolerance |
| Recommended level differential | Greater than 0.3m |
| Float-body density | 0.69g/cm³ |
| Maximum pressure | ≤1MPa |
| Protection rating | IP68 |
| Float dimensions | Ø75×123mm |
| Counterweight dimensions | Ø52×60mm |
| Function | Conductor | Operation |
|---|---|---|
| Common | Black; some assemblies use yellow-green | Common switching conductor; confirm identification on the supplied cable |
| Filling | Blue | Closes to common when the float falls to −45° |
| Drainage | Brown | Closes to common when the float rises to +45° |
The contact retains its previous state between the two switching angles. Isolate power before identifying conductors. A switching common must not be confused with protective earth. Insulate the unused conductor and protect all joints against moisture and condensation.
Loosen the counterweight fixing screw, pass the cable through its center and adjust the position for the required operating range. Confirm the upper and lower switching actions before tightening the screw. Keep sufficient clearance for the float to move freely without hitting the tank, piping or other equipment.
Match the control circuit to the switch marking and use a suitable relay or contactor where the load requires it. Keep cable terminations dry. Inspect the cable, housing and weld regularly, and stop using the switch if any part is cut, deformed or leaking. Specify the enclosure grade and cable length when ordering.
