The Alicat Scientific Whisper MWB Series mass flow meter is a portable device utilizing a rechargeable battery as its power source, perfect for verifying flow rates in remote locations. With very low pressure drop operation, it serves as an ideal portable transfer standard or hand-carry flow meter for applications with minimal differential pressure availability.

Flow ranges are available from 0.5 standard cubic centimeters per minute to 500 standard liters per minute with a 200:1 turndown ratio and pressure drops as low as 3.6 mbar (0.052 psi). Basic accuracy is ±0.8% of reading ±0.2% of full scale. Instruments are calibrated and ready for use with 20 gases and 10 gas blends, featuring a remarkably fast start-up time and response time of just 10 milliseconds.

In addition to mass flow measurements, the MWB Series measures pressure, temperature, and volumetric flow, meaning fewer instruments to buy and install. A low battery warning indicator alerts users to charge the battery. All measured parameters are displayed in real time on the digital display, with push button interface allowing easy configuration without computers or scripts.

The MWB is also equipped with connectors for hard power and with analog and digital output, allowing it to be used in fixed installations while relying on the rechargeable battery as a backup power source should hard power be lost. Alicat's patented technology ensures very few moving parts with all internal components fixed in place, resulting in high consistency and repeatability.