Thermal Mass Flow Sensor WAFS 104 – Compressed Air Flow Meter
Actual Installation Images
WAFS – 104
THERMAL MASS FLOW METER
A thermal mass flow sensor is a practical solution for monitoring compressed air and industrial gas usage in manufacturing and process plants. The WiseAir WAFS 104 helps users monitor flow and consumption at different points in a compressed air or gas distribution system. It can support applications such as identifying gas leakage, measuring consumption at individual machines and monitoring process gases. With an insertion-type design and integrated display, the WAFS 104 is designed to provide convenient flow monitoring in industrial environments.
The WAFS 104 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 WAFS 104 which fits your needs. The WAFS 104 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 WAFS 104 sensor technology offers you a high resolution and a high sampling rate, which results in a very fast and precise measurement.
Model Selector (WAFS 104)
Use this selector to generate the correct ordering code based on pipe size and options.
What Flow Range and Accuracy Does the WAFS 104 Offer?
The WAFS 104 provides a wide flow measurement range of 0(0.1) to 250 Nm/s, making it suitable for different compressed air and industrial gas applications. The sensor offers an accuracy of ±(1% reading + 0.3% full scale), allowing users to monitor flow and consumption with consistent measurement performance.
The sensor also provides a sampling rate of 60 samples per minute and supports configurable reference conditions of 20°C and 1 bar(a) according to ISO 1217. These capabilities make the WAFS 104 suitable for applications where reliable flow data is required for monitoring and managing gas consumption.
How Can the WAFS 104 Be Used to Monitor Gas Consumption?
The WAFS 104 can be installed at individual machines or points of use to monitor gas consumption within an industrial facility. It can help users understand where compressed air or process gas is being consumed, making it suitable for machine-level monitoring, consumption analysis and gas leakage detection.
The sensor measures standard flow, mass flow and consumption and provides the measured information through its integrated display. For plant-level monitoring, the WAFS 104 also supports 4–20 mA, pulse output and RS485 Modbus RTU, allowing flow data to be connected to suitable monitoring or control systems.
How Is the WAFS 104 Installed in an Industrial Piping System?
The WAFS 104 uses an insertion-type installation design that allows the sensor to be positioned directly in the process pipe. It can be installed under pressure through a 1/2-inch ball valve, helping users install the flow sensor without requiring a complete shutdown of the compressed air or gas line when the installation conditions are suitable.
The sensor uses a G1/2″ process connection and is available with an anti-ejection design for insertion-type installation. The operating pressure range is specified as 0 to 5.0 MPa, while pressures above 1.6 MPa require the appropriate installation device. This makes correct installation and pressure conditions important when selecting the WAFS 104 for a plant application.
Features :
Independent of pressure and temperature changes
Insertion Type with Anti Ejection Design
Measures standard flow, mass flow and consumption
Installation under pressure through 1/2” ball valve
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
CE marked in accordance with applicable EU Directives. Declaration of Conformity available upon request.
A thermal mass flow sensor measures gas flow by detecting heat transfer from a heated element. As compressed air flows past the sensor, it carries away heat proportional to the mass flow rate.
What are the advantages of thermal mass flow sensors for compressed air?
Thermal mass flow sensors offer no moving parts, low pressure drop, direct mass flow measurement, wide turndown ratio, and minimal maintenance requirements for compressed air systems.
Can the WAFS 104 measure different gases?
While optimized for compressed air, the WAFS 104 thermal mass flow sensor can be calibrated for other industrial gases including nitrogen, oxygen, and natural gas.
Product enquiry
Need this for your plant?
Send us your line size, operating pressure and flow range and a WiseAir application engineer will confirm the right model, the delivery time and the price. We manufacture in India, so lead times are weeks rather than months.
WiseAir Technologies India LLP is part of the Systel Asia group — specialists in compressed air management and smart monitoring solutions across Asia since 2002.
Send us your line size, operating pressure and flow range and a WiseAir application engineer will confirm the right model, the delivery time and the price. We manufacture in India, so lead times are weeks rather than months.
