SIEMENS SITRANS FS220 7ME3950 Clamp-on Ultrasonic Flowmeter
SITRANS FS offers versatile flow measurement for liquids and gases. Choose a non-invasive clamp-on solution for cost-effective and fast installation,avoiding process downtime. Alternatively,choose an inline version for direct media contact. Whether your application is standard or complex,you get reliable performance across various industries, including water, chemical, oil & gas and hydrogen
Overview
The SITRANS FS220 is a clamp-on ultrasonic flow system consisting of an FST020 transmitter and FSS200 clamp-on sensors.
The transmitter classification FST020 describes a basic clamp-on ultrasonic flowmeter for basic application requirements. Based on the same digitalized platform as the FST030 this system provides the same accuracy and similar functions on a lower cost level. This system is ideal for water measurement and any application not requiring temperature or viscosity compensation.
Benefits
- Easy installation at any time; no production stop, no need to cut pipe or stop flow
- Minimal maintenance; external sensors do not require periodic cleaning
- No moving parts to foul or wear. No contact with media
- No pressure drop or energy loss
- Wide turn-down ratio, bidirectional and high stability at zero flow conditions
- Anomaly compensation tool for correction of non-ideal straight pipe runs. Automatic compensation during backflow
- Optional WideBeam technology ensures highest performance and accuracy
- Compatible with all previously installed transit time sensors
Application
- Pipe sizes from 10 mm to 10 m
- Pipe materials: ideal for all metals, glass, FRP and most PVC variants; NOT for concrete pipes and special compound pipes
- Pipe wall thickness from 1 to 35 mm; specials on request up to 65 mm
- Media temperatures from -40 to 121 °C; universal high temperature sensors for up to 230 °C max.
- Underground/submerged locations, non-ideal environments, strong pipe vibrations
SITRANS FS220 flowmeters are suitable for most clean liquid applications, including the following:
- Water and wastewater industry
- Potable water
- Water and aqueous solutions
- Wastewater, influent & effluent
- Processed sewage, sludge
- Chemical feed industry
- Sodium hypochlorite
- Sodium hydroxide
- HVAC and power industries
- Coolant flow
- Fuel flow
- Utility district heating, cooling
- Refrigeration liquids
- Process control
- Chemicals
- Pharmaceuticals
- Food products
- Very low flow sensitiity (< 0.1 m/s)
- High temperature liquids > 120 °C (248 °F)
Function
The SITRANS FS system is a transit-time ultrasonic meter that provides exceptional performance using a non-intrusive clamp-on approach. Ultrasonic sensors transmit and receive acoustic signals directly though the existing pipe wall, where the fluid refraction angle is governed by Snell’s law of refraction.










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