Bamo PDP Small Plastic Flow Indicator applies the principle of variable area flow-meter: the flow raises a diver in a conical tube expanding the cross section of fluid passage. The diver moves up proportionally to the flow-rate (diver is commonly named ”float”). Standard equipment includes a graduated scale in l/h of water at 20 °C. In options there are specific scales: Air in Nm³/h; HCl at 30…33 %; NaOH at 30 % & 50 %.

Bamo PDP Features:

  • Direct reading
  • All wet parts in plastics
  • Materials: PVC, PSU, PVDF, EPDM
  • Scales from 2.5 up to 1,000 l/h of water
  • Other scales: Air in Nm³/h, HCl and NaOH.
  • Option: Adjustable contacts

Precautions for mounting:

Flow indicators must be installed vertically with rising fluid. It is recommended to have a length upstream of 10 x ND and downstream of 5 x ND.


PDP series are ideally suited for continuous measurement of flow for air and neutral, basic or acidic liquids.

Another Article:


Pressure limit 10 bar max. at 20 °C
Temperature limits at 1 bar PVC: 0 … +50 °C (Water)
PSU (Polysulfone): 0 … +90 °C (Max. 60 °C with
PVC fittings)
PVDF (option) on request
Graduated scales l/h (Standard for water at 20 °C)
Specific scales Air in Nm³/h (1 to 9 bar absolute pressure)
HCl (30 … 33 %); NaOH (30 % and 50 %)
Materials PVC or PSU (Polysulfone)

Measuring tubes

Diver and stoppers PVDF
Seals EPDM (standard) – FPM in option
Unions PVC for solvent welding
Fittings Standard: PVC Unions for solvent welding
Contacts Z42 and Z40
The flow indicator must have a diver with a built-in magnet (PVDF-A)
Switching power Max. 10 W / 12 VA; 230 V AC; 0.5 A
Operation Z42: Change-over contact, N.O. without flow
Z40: Change-over contact, N.C. without flow
Protection IP 65 – Pluggable terminal block
Ambient temperature 0… +55 °C

Download Data Sheet: Small Plastic Flow Indicator PDP