Available from Delta controls is an ultrasonic flow transmitter designed for accurate, cost effective measurement of air and gas flows in engine blow-by applications. The flow transmitter is widely specified for use on engine test beds by engine manufacturers and developers of lubricating oil. It is used to evaluate engine wear by quantifying the volume of “blow-by” gas, which increases steadily over time as the engine wears.
Using vortex measuring principles, the Delta Controls unit works by detecting and measuring turbulence created by an obstruction in the flow.
It transmits an ultrasonic carrier wave across the flow and this is modulated by the passing vortices. The frequency of modulation is processed through signal conditioning electronics to produce a pulsed output that can be monitored.
More accurate than traditional methods of measuring gas flow, such as rotameters, the compact Delta Controls design has no moving parts. This ensures exceptional reliability overall and an accuracy of 1% with excellent repeatability. Extremely low pressure drops are a key feature – typically 1.2m bar at full flow.
Delta’s transmitter is designed for pipes from 10mm to 25mm in diameter, flow rates from 6 to 825 l/m, pressures up to 20 bar and has a temperature range from –20 to + 120ºC. Rated weather-proof to IP66, the transmitter is supplied with PTFE sensors and stainless steel sensor heads as standard.