An automatic recording film balance system is described. It consists of a film trough and two pendulum type balances with pressure ranges of 0–400 (800) millidynes/cm and 0–40 (80) dynes/cm, respectively. Each balance is connected to a float when in operation (Langmuir type balance) and the sensing element in both cases is a linear variable differential transformer, the iron core of which is connected to the pendulum. The transformer signal after amplification drives the pen motor of a strip chart recorder. Special features like a constant pressure device together with auxiliary instruments such as a second X‐Y recorder, an automatic dipping device for film transfer, a volta potential meter and a slit viscosimeter permit the automatic recording of the following functions:dFdAT, dAdTF, dFdTA, dFdtT, A, dAdtT, F, AwAsT, F, dVdFT, and d&eegr;dFT.F=film pressure,A=film area,T=temperature,t=time,Aw/As=deposition ratio, &eegr;=film viscosity, andV=volta potential. Test and performance data are presented.