Ultrasonic Sensor for Gas Flow Measurement

Ultrasonic flow sensors are ideal for smart metering of heat energy and water meters. These products can assess the flow measurement of gas flow, by transmitting and receiving ultrasonic waves. Time of Flight or Doppler shift flow can be measured by transmitting and receiving ultrasonic waves across the channel.
This technology utilizes two or three transducers for smart metering of natural gas or air-coupled level sensing of liquids and solids. Capable of operating in temperatures between -20°C and 70°C in air, and -10°C and 40°C in natural gas, the transducers deliver an assured solution for assessing gas flow measurement.

Electrical Specification All measurement made at 23ºC in air
and 50% R.H
Nominal drive frequency 200kHz +/- 5%
Maximum instantaneous drive voltage 90Vp-p (single cycle)
Minimum paired sensitivity -70dB when measured peak-to-peak in air driven with a 20 cycle burst at
200kHz across a 160mm air channel
Bandwidth 50kHz minimum
-3dB Beam width at 200kHz 10º +/-2º
Capacitance 2500pF +/- 20%
Tan Delta 0.035 maximum
Insulation resistance at 250V 1Gohm MIN
Environmental Specification
Operating temperature in air 20ºC to +70ºC
Operating temperature in natural gas 10ºC to +40ºC
Splash resistant Yes
Resistant to non-aggressive cleaning  fluids Yes
Operational relative humidity 0% to 95% non-condensing