Low Volume Flowmeter. length 125 mm. Range 0.8...8 L/h air. Connection 1/4 NPT. Accuracy class 2.5.

Low Volume Flowmeter
Brand: Kobold (Alemania)
Model: KDG-22-09-N-V-0-00-0
[KDG-22]:
Mounting length 125 mm
Operating principle variable area
Flow direction from bottom to top
Body material st.st.
Glass Borosilicate
Accuracy class 2.5
Max. temperature without/with contact  100 °C / 80 °C
Max. pressure PN 16
[09]: Measuring range 0.8...8 L/h air
[N]: Connection 1/4 NPT
* not possible with option "pressure regulator"
[V]: Seal: FPM
[0]: Panel mounting kit, w/o
[00]: Contacts measuring range, w/o
[0]: Flow differential pressure regulator, w/o
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Datasheet: http://www.kobold.com/uploads/files/s1gb_kdf-kdg-1.pdf