Capable of measuring ultra low flow ranges from 1.5 to75 mg/h (0.025-1.25 μl/min) up to 12 to 600 mg/h, based on water, the compact LIQUI-FLOW mini mass flow meter is equipped with a microprocessor-based PCB that offers high accuracy and temperature stability. Developed by Bronkhorst High-Tech, it withstands up to 1000 bar and is, thus, suitable for HPLC systems. The straight, duplex steel sensor tube has an internal volume of less than 1 mm3 and operates on the thermal measuring principle. The RJ45 connection is used for power supply and for both analog and digital (RS232) communication. The miniature-sized and lightweight design of the instruments makes them suitable for applications in portable systems.