Description
The QSKI is a mechanical in-line piston flow switch with a housing in plastic, aluminium or stainless steel. It is particularly suited to liquids and gases in industrial automation, machinery, air compression, refrigeration and air conditioning.
A magnetic piston on a spring is displaced by the flow, and the magnet closes a reed contact outside the wetted part. Setting range in six order fields from 0.3 … 7 to 27 … 70 L/min, setting scale on the body calibrated in water at 20 °C. Accuracy ± 5 of the total range, for which the datasheet gives no unit. Hysteresis at least 0.6 L/min. Output dry reed contact, normally open, one or two switch points, switching capacity 24 V DC / 250 V AC, 100 mA. Supply 24 V DC ± 20 % or 230 V AC ± 15 % by order code, status LED on DC only. Connection M12, four pins.
Housing in POM (10 bar), anodised aluminium (50 bar) or stainless steel (100 bar), piston POM, spring stainless steel, seal NBR. Process connection female thread G1/4 to G1. Pressure loss 0.3 bar at 25 L/min, medium temperature ≤ 90 °C, protection IP67. A declaration of conformity is not documented in the datasheet. Before sizing, note: The parameter table gives 50 bar for every model; the housing material decides, and the plastic version holds 10 bar. The 5 … 40 L/min order field has no row in the parameter table. Not every thread is offered in every range, and the order code rejects no combination.
Advantages at a glance
- Mechanical principle with reed contact outside the medium
- Housing in POM, aluminium or stainless steel
- Up to 100 bar with stainless housing
- One or two switch points
- Supply 24 V DC or 230 V AC
- Setting scale on the body
- For liquids and gases
- Protection IP67