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Magnetic Level Sensors
QLevel – HFS 1150 Series
The QLevel HFS 1150 is a compact horizontal float switch for reliable point level detection in water-based systems. A magnetic float and reed switch give simple NO/NC switching, reversible by float orientation, through an M16 side-entry thread, with contacts rated to 240 V AC and 0.6 A. PP wetted parts with EPDM or silicone seals suit potable water duty, and WRAS / BS 6920 material compliance is available upon application.
Measurement range
Point level detection
Output / communications
SPST reed, NO/NC reversible
Process connection
M16 threaded side entry
Process temperature
−20 to +75 °C
Approvals / Protection
WRAS / BS 6920 on request
Technical Specifications
| Measuring principle | Magnetic float with reed switch |
|---|---|
| Primary measurement | Point level detection |
| Contact form | SPST; NO/NC reversible by float orientation |
| Mounting | M16 threaded side entry |
| Max. switching power | 20–25 W |
| Max. switching voltage | 240 V AC; 120 V DC |
| Max. switching current | 0.6 A (resistive load only) |
| Contact resistance | ≤100 mΩ |
| Insulation resistance | ≥10⁹ Ω |
| Electrical life | ≥10⁵ cycles |
| Minimum fluid SG | ≥0.85 |
| Operating angle | 30–40° float movement |
| Cable | UL2464 PVC flying lead; double or single insulated; 1 m / 2 m / custom length |
| Wetted materials | PP float and body; silicone or EPDM seal |
| Medium temperature | −20 to +75 °C |
| Ambient / storage temperature | −30 to +90 °C / −40 to +100 °C |
| Material compliance | WRAS / BS 6920 available upon application |
Key Features
- Compact horizontal side-mounted float switch for reliable liquid level detection in water-based systems.
- M16 threaded connection allows simple installation into tank walls.
- Reversible NO/NC switching is achieved through float orientation.
- Magnetic reed switch operation gives dependable high or low level control.
- Wetted materials are selected for suitability in potable water applications.
Typical Applications
- Pump-System Level Control
- Water Tanks
- OEM Equipment Integration
- HVAC Liquid Monitoring