Tecfluid 6000 Series


Tecfluid 6000 Series

Variable area glass tube flow meter

Working principle

The Tecfluid 6000 Series flowmeters work according to variable area principle, which is obtained by a float that moves inside a borosilicate glass tapered tube.The fluid flows up through the tapered tube forcing the float to a position with sufficient free area to enable the flow to pass, where there is an equilibrium of forces: – E = force of the fluid flow – Pf = weight of the float – Al = free area of flow (Al = Ac, tube area, – Af, float area) Each position of the float corresponds to a value of flow rate.

Tecfluid 6000 Series


  • Easy installation
  • Local indication by means of direct reading
  • Low pressure drop
  • Scales directly in l/h, m3/h, kg/h, l/min, %, etc.
  • Plastic protection against accidental breakage of the glasstube
  • Flow rate:- Water: 2.5 l/h … 50 m3/h – Air: 45 Nl/h … 1500 Nm3/h
  • Accuracy: 1.6% (qG=50%)
  • Connections:- BSP or NPT threaded connections: ½” … 3” – EN 1092-1 or ASME B16.5 flanges: DN15 … DN80 / ½” … 3” Other flange standards on request – PVC solvent weld socket connections or EN 1.4404 (AISI 316L) connections for welding – Sanitary couplings according to ISO 2852, SMS 1145, DIN 11851, TRI-CLAMP®
  • Materials:- Measuring tube: borosilicate glass – Frame: galvanized and coated steel, EN 1.4301 (AISI 304) – Protection shield: polycarbonate (UV resistant) – Wetted parts: galvanized and coated steel, EN 1.4404 (AISI 316L), PVC, PP, PTFE, PVDF – Float: EN 1.4404 (SS 316L), aluminium, PVC, PP, PTFE, PVDF
  • Local indication
  • Options:- 1 or 2 limit switches – Electronic transmitter with 4-20 mA analog output for safe or hazardous area (Ex ia IIC T6 protection, ATEX certified). HART, FIELDBUS & PROFIBUS protocols available on request.


  • Water treatment
  • Heating-cooling circuits
  • Laboratories
  • Control of gas burners
  • Chemical industry and heat treatment ovens
  • Flow rigs


  • 6001 BSP / NPT threaded connection or PVC solvent socket or EN 1.4404 for welding
  • 6002 EN 1092-1 flange connection. Others on request
  • 6011 DIN 11851 sanitary coupling
  • 6013 CLAMP ISO 2852, TRI-CLAMP® sanitary coupling
  • 6015 SMS 1145 sanitary coupling
  • 6000-Feall components in galvanized and coated steel
  • 6000-SS wetted parts in EN 1.4404 (AISI 316L). Other components in galvanized and coated steel
  • 6000-FULLY SS all components in EN 1.4404 (AISI 316L), except frame in EN 1.4301 (AISI 304)
  • 6000-PVC wetted parts in PVC. Other components in galvanized and coated steel
  • 6000-PP wetted parts in PP. Other components in galvanized and coated steel
  • 6000-PTFE wetted parts in PTFE. Other components in galvanized and coated steel
  • 6000-PVDF wetted parts in PVDF. Other components in galvanized and coated steel


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