Measurement & Control  >  Flowmeters  >  Trogamid (PA)

Overview categories   Overview all products   Configurator
Float material Stainless Steel AISI 316  

Float material Stainless Steel AISI 316

[Show subcategories]
  Float material Stainless Steel AISI 316 with magnet  

Float material Stainless Steel AISI 316 with magnet

[Show subcategories]
  Float material PP  

Float material PP

[Show subcategories]
Float material PP + magnet  

Float material PP + magnet

[Show subcategories]
  Float material PVDF  

Float material PVDF

[Show subcategories]
  Float material PVDF with magnet  

Float material PVDF with magnet

[Show subcategories]

Precise Flow Measurement with Float Flow Meters: Trust in Reliable Measurement Results and Intuitive Reading

Float flow meters, also known as float-type flow meters or rotameters, are highly accurate instruments for measuring the flow of liquids or gases. This measuring device operates on the principle of buoyancy and delivers precise and dependable measurement results. A typical float flow meter consists of a vertically arranged glass tube with an inlet at the bottom and an outlet at the top. Inside the glass tube, there is a float that is pushed upward by the flow of the medium. The stronger the flow, the higher the float rises in the glass tube. The position of the float on a scale attached along the glass tube allows for easy reading of the flow value.

Float flow meters are known for their ease of use and do not require an external power supply. They provide a visual display of the flow, enabling quick and intuitive reading. This type of flow meter finds applications in various fields. In the process industry, float flow meters are used to monitor the flow of liquids or gases in chemical plants, refineries, food processing facilities, and other production environments. In water treatment, they are employed to measure the flow of water in wastewater treatment plants, drinking water facilities, and irrigation systems. Additionally, float flow meters are utilized in heating and air conditioning systems to monitor the flow of water or coolant. In laboratories, they find application in measuring the flow of liquids and gases in scientific experiments and research applications.

It is important to note, however, that float flow meters are best suited for low to medium flow rates. At extremely low or high flows, they may deliver inaccurate or unreliable results. Additionally, the installation of a float flow meter in a pipeline introduces a certain pressure loss, which must be taken into account in low-pressure or low-flow systems. Moreover, float flow meters are sensitive to vibrations and shocks, which can lead to imprecise measurements. In environments with strong vibrations or when dealing with aggressive media, alternative solutions that better suit the specific requirements should be considered.

Despite these limitations, float flow meters offer numerous advantages. In addition to their user-friendly operation and easy installation, they do not require additional instrumentation or an external power supply. This makes them cost-effective solutions for flow measurements in various applications. Furthermore, they provide a direct visual display of the flow, enabling operators to quickly and easily read the current flow rate.

To ensure accurate measurements, proper calibration of float flow meters is crucial. Calibration is typically performed for a specific medium and is based on either experimental data or theoretical assumptions. It is important to ensure that the flow meter is correctly calibrated for the specific medium and operating conditions in order to deliver accurate measurement results.

When selecting a float flow meter, the choice of materials should also be considered. The glass tube is often made of robust and transparent borosilicate glass, ensuring excellent visibility of the float. The float itself can be made of various materials such as metal or plastic. The selection of material depends on the specific characteristics of the medium, including temperature, pressure, and chemical resistance.

Moreover, there are electronic versions of float flow meters available that operate on the same principle but employ sensors to measure the flow. These electronic flow meters offer advanced features such as digital displays, data recording, integration into control systems, and communication interfaces. They provide higher precision and offer additional possibilities for flow monitoring and control.

In conclusion, it is important to emphasize that the choice of the appropriate flow measurement device depends on the specific requirements of the application. When in doubt or when facing more complex requirements, it is advisable to seek advice from experts to ensure that the selected measuring device meets the specific requirements and enables accurate and reliable measurements.

Optimize your shopping experience with our detailed delivery information

Plastic pipe systems

Overview of plastic pipe systems
Technical information on ABS pipe systems
Technical information on PVC  U pipe systems
Technical information on PVC  U transparent pipe systems
Technical information on PVC  C pipe systems
Technical information on PP pipe systems
Technical information on PP-R pipe systems
Technical information on PE pipe systems
Technical information on PVDF pipe systems

Chemiedur - pipe

Technical information on UP-GF (FRP) pipe systems
UP-GF (FRP) pipes
UP-GF (FRP) molded parts and connection
UP-GF-PP (FRP) molded parts and connection
UP-GF (FRP) adhesive collars
UP-GF (FRP) loose flanges
Pot Strainer DN 200 - DN 500 Inliner PP/FRP Coated
Pot Strainer DN 200 - DN 500 Inliner FRP/CBL Coated
Angle Seat Strainer DN 200 - DN 400 Inliner FRP/CBL Coated
Manhole mad of FRP and PP/FRP

Plastic pipes

Calculator for cutting pipes
Guidelines for sawing plastic pipe
Leftovers in plastic pipe
Standardization of plastic pipes and molded parts
PVC U pipes deviations
Pressure loss in pipe systems out of PVC U, PVC C and ABS pipe systems
Distinction between Rp, R and G threads
Screw lengths for flange connections

Plastic fittings

PVC U transparent ball valves
Diaphragm valves
Block valves
Butterfly valves
Plastic needle valves


Plastic Valves according to ATEX

New EU guideline 2014/34/EU
Plastic Valves in EX zones
Y-Strainers PP-EL DN 15 - DN 50
Check valves PP-EL DN 15 - DN 50
Angle seat valves PP-EL DN 15 - DN 50

Bonding of plastic pipes

Bonding manual
Video showing the bonding of pipes

Plastic welding

Guidelines for extrusion welding

Grids / support grids

GFK grids
Grids out of PP -el electrically conductive
Profile support grids out of PP -el electrically conductive

Molded ventilation parts

Ventilation technology

Chemical hose

PVC transparent hose with fabric inlay

Industrial tanks and chemical containers

Dosing tanks and outer containers 35 – 1000 Liter
Salt dissolving tanks 60 -5000 Liter
Storage tanks and vats
Storage tanks for water
Safety and collecting troughs
Industrial tank delivery program
Dosing tanks with agitator
Dosing tank agitators
Dosing tanks with attachments
Dosing tanks made of sheet material
Customized chemical containers
Dosing tanks with level indicators



IBC screw caps DN 150/DN 200
IBC adapters out of PE
IBC adapters out of PP

Attachment parts for tank construction

Vapor separators
CO2 - absorbes
Revision nozzles
Block flange

Filter housings and filter cartridges

PENTEK 3G Slime Line filter housings
PENTEK 3G Standard filter housings
PENTEK Big Blue filter housings
PENTEK PP high temperature filter housings
PENTEK PP all nature filter housings
PENTEK filter bags for Big Blue filter housings
PENTEK surface filter cartridges
PENTEK filter cartridges for depth filtration
PENTEK filter cartridges with activated carbon
CINTROPUR filter systems
CINTROPUR water filters

Flange configurator

Blind flanges, loose flanges,  rectangular flanges

Chemical resistance

Table of chemical resistance for plastic pipe systems

Machined plastic parts

Screw-in parts
Threaded fittings
Screw fittings

Milled plastic parts

Loose flanges and blind flanges made of sheet material

Static mixers

Static mixers made of plastic


Single-type and double-type strainers
Pot strainer DN 300
Angle seat strainer DN 500

Flow meters

Variable area flow meters
Configuration tool for flow meters

Filter presses

Laboratory filter presses

Injection molded parts

Scraper made of PE for filter press

Kwerk Practice Blog

The Kwerk team blogs from the field here

Partnership at the highest level.