Operation manual for the Xingshen UQK6XXX high‑temperature, high‑pressure float (displacer) level switch.
The UQK6XXX series float (displacer) level switches are designed for high‑temperature and high‑pressure applications in industries such as petroleum, chemical, power, food and pharmaceutical. They use a magnetic coupling mechanism based on Archimedes' principle to detect liquid level changes and provide SPDT contact signals for control, alarm and safety interlock.
The manual covers the working principle, technical specifications, installation methods (top‑mount and side‑mount), wiring, operation, maintenance, and explosion‑proof requirements. It also includes service guarantee information and safety precautions for hazardous environments. This manual is written in Chinese.
| Output signal | Two independent SPDT contacts |
|---|---|
| Measurement accuracy (level control) | ±4 mm |
| Measurement accuracy (interface control) | ±10 mm |
| Contact rating (resistive load) | 16 A 250 VAC, 10 A 30 VDC, 0.6 A 125 VDC |
| Contact rating (inductive load) | 10 A 250 VAC, 10 A 30 VDC, 0.6 A 125 VDC |
| Switch life | ≥5 × 10⁵ cycles |
| Working temperature (standard type) | -40 °C ~ 200 °C |
| Working temperature (high‑temp type) | ≤540 °C |
| Ambient temperature range | -40 °C ~ 80 °C |
| Nominal pressure | 2.5, 4.0, 6.4 MPa; 11, 16, 25, 32 MPa |
| Medium density range | 0.4 ~ 3.0 g/cm³ |
| Medium density difference | ≥0.16 g/cm³ |
| Electrical interface | NPT 1/2 (internal) or M20×1.5 |
| Explosion‑proof rating | ExdIICT1‑T6, ExiaIICT1‑T6 |
| Protection rating | IP67 |
It works on Archimedes' buoyancy principle; the float moves with the liquid level, moving a magnetic sleeve that changes the magnetic field and drives the contacts to open or close.
For top‑mount, the float and steel cable must hang naturally without knots; for side‑mount, the body must be vertical to allow free movement of the float.
The switch is available in explosion‑proof types ExdIICT1‑T6 (intrinsically safe) and ExiaIICT1‑T6 (intrinsically safe), suitable for hazardous areas.