S401/S421 Thermal Mass Flow Sensors

Designed as affordable and easy to use, with a high resolution and sampling rate.

S401 / S421 FEATURES AT A GLANCE
Measures standard flow, mass flow and consumption
Thermal mass flow, independent of pressure and temperature changes
IP65 casing provides robust protection in rough industrial environment
Very fast response time
High accuracy and wide measuring range
Isolated mA and pulse output signals or Modbus/RTU or
Modbus/TCP interface
Selectable gas type (Some gases require real gas calibration!)
Sensor can be calibrated in 2 different gases

S401 BENEFITS (insertion type)
Tube diameters of DN25 and above
2 installation types: centre installation and 100 mm insertion depth installation for bigger pipes (> DN250)
Installation under pressure through 1/2” ball valve

S421 BENEFITS (inline type)
Pipes sizes available: DN15, DN20, DN32, DN40, DN50, DN65, DN80
Fits your needs: various process connections available
(R-thread, EN 1092-1 flange or ANSI flange)
Exchangeable sensor unit (easy sensor swap)
Optional flow conditioner, no need for a straight inlet anymore


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SUTO - S401/S421 Thermal Mass Flow Sensors

The S401 compressed air flow meter is designed to be easy to use, affordable and it's offering a wide measurement range. This makes it easy for you to choose the right flow meter, the S401 which fits your needs. The S401 is a thermal mass flow meter, based on its measurement principle it's not required to compensate the compressed air pressure and temperature, so you do not need any additional measurement installations to measure the flow and the consumption.

Due to the thermal mass flow, the flow meter is also well suited to be used in any other gas as Nitrogen or many other technical gases. The S401 sensor technology offers you a high resolution and a high sampling rate, which results in a very fast and precise measurement. The flow meter is able to save two calibration curves, due to this the sensor can be used in two different gases without any loss of accuracy. The optional color display is designed to show all measured values like actual flow and total consumption. At the same time, the display can be used to manage the sensor settings like pipe diameter, gas type or output settings.

The S401 flow meter offers two different signal output options. It can be equipped with an isolated analog and pulse output to read out the compressed air flow and the total compressed air consumption. Alternatively, a MODBUS RTU interface can be used to access all measured values via the digital interface.

Since the flow meter can be easily installed through a standard ball valve, it can be easily removed for a calibration, without shutting down your compressed air system. Various settings such as gas type, flow unit, reference standards, can be set ex factory according to your needs. If It's needed to change the settings on site, then you can use our free S4C-FS mobile phone application for android phones. This enables you to change the settings wirelessly on site, within a touch of your smartphone. Managing your compressed air was never easier. Of course, if there are any special requests, as custom flow ranges or different gas types, feel free to contact us.

This all makes the S401 compressed air flow meter the best suited sensor for your application.

S401 FEATURES:

  • Thermal mass flow, independent of pressure and temperature changes
  • Measures standard flow, mass flow and consumption
  • Installation under pressure through 1/2” ball valve
  • Sensor can be calibrated in 2 different gases
  • Selectable gas type (Some gases require real gas calibration!)
  • With the integrated display users can see the actual flow and the total consumption
  • IP65 casing provides robust protection in rough industrial environment
  • Isolated mA and pulse output signals or Modbus/RTU interface
  • Very fast response time, high accuracy and wide measuring range
  • Tube diameters of DN25 to DN500
  • 2 installation types: center installation and 100 mm insertion depth installation for bigger pipes (> DN250)

The S421 compressed air flow and consumption meter covers a wide measuring range. With the high resolution and sampling rate a very fast and precise measurement is achieved. The installation is done through the selected measuring section, with R-thread or with flange connection. The sensors is able to save two calibration curves, due to this the sensor can be used in two different gases without any loss of accuracy, for example the compressed air flow can be measured but a the same time it can be used in Nitrogen. The optional colour display is designed to show all measured values like flow and total consumption. At the same time the display can be used to manage the sensor settings like pipe diameter, gas type or analog output scaling. The sensor offers two different signal output options. It can have a isolated analog and pulse output to read out the flow and the total consumption. Alternatively a MODBUS RTU interface can be used to access all measured values via the digital interface.

Various settings such as gas type, flow unit, reference standards, can be set ex factory according to your needs. If its needed to change the settings on site, then you can use the our free S4C-FS mobile phone application for android phones. This enables you to change the settings wirelessly on site, within a touch of your smartphone. Managing your compressed air was never easier.

The S421 is the perfect meter to monitor your compressed air system and measure the compressed air flow and consumption.

S421 FEATURES:

  • Easy and affordable sensor solution to measure the compressed air flow and consumption
  • Sensor is calibrated in the measuring section, this allows a very high precsision
  • Two calibration curves can be saved on to the sensors internal memory
  • Due to the two calibration curves the sensor can be used with highest precision in two different gases
  • Velocity, Flowrate, Consumption and Temperature are displayed
  • IP65 protection class offers a rugged protection in rough industrial environment
  • Isolated analog and pulse outputs or MODBUS/RTU interface
  • Thermal mass flow measurement, pressure and temperature independent
  • Very fast response time, high precision and wide measuring range
  • Pipes sizes available: DN15, DN20, DN32, DN40, DN50, DN65,DN80
  • Integrates seamlessly in your compressed air system
  • Fits your needs: various process connections available(R-thread, EN 1092-1 flange or ANSI flange)
  • Exchangeable sensor unit (easy sensor swap)
  • Optional flow conditioner, no need for a straight inlet anymore