Description
The QSKD is a settable calorimetric flow switch with housing and probe in stainless steel. It is particularly suited to water, oil, gas and other media compatible with stainless steel in hydraulics, lubrication, pumps, cooling, ventilation, water treatment and leak detection.
Measuring principle thermal diffusion with a reference sensor and a heated sensor in one probe. Setting range as flow velocity: 1 … 150 cm/s water, 3 … 300 cm/s oil, 20 … 2000 cm/s air; the scale is calibrated in water. Repeatability 1 % below 0.6 m/s, 3 % below 1.5 m/s, 10 % above 1.5 m/s; an accuracy is not documented. Output PNP, NPN or relay, normally open or normally closed set in the field, switching load 500 mA at 24 V DC or 60 W (relay). Supply 12 … 30 V DC, response time 2 s typical. Setting by inductive keys with a magnetic pen, connection M12 × 1, four pins.
Housing 304 stainless steel, probe 316L stainless steel, housing turnable through 330°. Process connection G1/2, G1/4, R1/2 or R1/4 male, M18 × 1.5 female or clamp 25.5 mm or 50.5 mm to ISO 2852:1993. Pressure rating 100 bar, medium temperature -20 … +85 °C, protection IP67. A declaration of conformity is not documented in the datasheet. Before sizing, note: The setting range is a flow velocity in water; for other media the value has to be specified separately. The 300 bar option named in the data block has no order field. For the relay (60 W) neither a voltage nor an AC/DC rating is documented.
Advantages at a glance
- Repeatability documented, 1 % below 0.6 m/s
- Housing 304 stainless, probe 316L stainless
- Setting by keys and magnetic pen
- Normally open or normally closed set in the field
- Output PNP, NPN or relay
- Clamp connection to ISO 2852:1993 available
- Pressure rating 100 bar, protection IP67
- Housing turnable through 330°