1. Originally by Polaroid® for autofocus cameras: now marketed as the SensComp model 600 transducer, http://www.senscomp.com/ultrasonic-sensors/.
2. A combined ultrasonic flowmeter and binary vapour mixture analyzer for the ATLAS silicon tracker;Bates;J. Instrum. JINST,2013
3. G. Hallewell et al., The use of a 90 metre thermo-siphon cooling plant and associated custom ultrasonic instrumentation in the cooling of the ATLAS inner detector, in: Proc. 16th Intl. Conf. on Accelerator and Large Experimental Physics Control Systems (ICALEPCS2017): Barcelona, Oct 8–13 2017. http://accelconf.web.cern.ch/AccelConf/icalepcs2017/papers/thpha193.pdf.
4. ‘REFPROP’ Standard reference database 23, version 9.0, U.S;Lemmon,2010
5. Novel ultrasonic instrumentation developments for real-time monitoring of binary gas mixtures and flow: description and applications;Battistin;Sens. Transducers,2016