Vayubodhan Upkaran Pvt. Ltd. Manufactures Velocity Monitor with Digital Pressure Cell. Vayubodhan Upkaran Pvt. Ltd. Is the supplier of air pollution monitoring instruments. Velocity Monitor with Digital Pressure Cell has been designed in order to measure very low velocities especially in the range of 0-5m/s. Velocity Monitor with Digital Pressure Cell is provided with a digital pyrometer and thermocouple for measurement of temperature.