Haynes apparatus

Hayne [191] used a vertical U-tube mercury manometer with arms of length about 60 cm connected to a sample bulb. When the bulb, containing air at atmospheric pressure, is immersed in liquid oxygen at 

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Modem equipment uses electronic pressure sensors instead of Hg-manometers and digital technique to measure the vapor pressure. Also thermostating is more precise in recent apparatuses. The apparatus developed by Haynes et al. is shown in Figure 4.4.5 as example. 

Aderhold, D., Haynes, A.G., Spencer, ML.W. Winterbom D.J.W. (2003). Monolith coating apparatus and method therefore, US Patent 6,599,570 0ohnson Matthey). 

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