Description
The QEKJ is a vortex flow sensor without moving parts with optional temperature measurement. It is particularly suited to cooling and circulating water, organic and inorganic solutions as well as oxygen, nitrogen, ammonia and natural gas in lines with thread connection G3/8 … G2.
Vortex shedding behind a bluff body; the reading is not affected by the static pressure. Flow 0.5 … 400 L/min in seven sizes with < ± 3.0 % F.S., repeatability < 2.0 %, 5-point linearization. Temperature (option) 0 … 100 °C with ≤ 2.0 °C. Outputs 4 … 20 mA or 1 … 5 V up to two channels, switching output PNP or NPN (24 V DC / 200 mA), pulse up to 1 kHz, IO-Link and RS485. Supply 18 … 30 V DC, connection M8 × 1, 4-pin, or cable 2, 5 or 10 m.
Wetted parts PPS below 100 L/min, PA66 above 100 L/min and stainless steel 304. Process connection G3/8 … G2 internal thread, G, R or NPT. Pressure level 10 bar, maximum 16 bar, medium temperature -20 … +90 °C, ambient -10 … +65 °C. The protection grade is available on request. A declaration of conformity is available on request. Before sizing, note: Details of IO-Link version and IODD file and of RS485 protocol, baud rate and register map are available on request. The temperature range 0 … 100 °C does not match the medium temperature -20 … +90 °C.
Benefits at a glance
- Vortex principle without moving parts
- Seven sizes from 0.5 … 4 to 150 … 400 L/min
- For liquids and gases
- Temperature measurement as an option
- Totalizer and 5-point linearization
- Analogue, switching, pulse, IO-Link and RS485
- Display optional, screen can be turned by 180°
- Bracket in seven sizes