Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1978-06-27
1991-01-15
Moskowitz, Nelson
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 61R, 73 611R, G01N 2500, G01N 1100
Patent
active
049844520
ABSTRACT:
This system measures the concentration level of additives dissolved or sunded in a liquid by measuring the changes which the additives cause to the heat transfer characterisitics of the liquid. A plurality of cylinders and pistons sample the liquid to be measured and pump the samples past a hot film anemometer probe at a constant flow rate. A grid of wires upstream from the hot film anemometer probe is used to cause isotropic turbulence in the liquid flow around the measuring probe. The output signal from the measuring probe is proportional to the rate at which heat is transferred away from the probe by the liquid flowing past. The rate at which heat is transferred away from the probe is a function of the specific heat, thermal conductivity, viscosity, and turbulent flow characteristics of the liquid which in turn are a function of the concentration level of additives in the liquid. Calibration curves for a given additive, liquid temperature and liquid flow rate are used to determine concentration level from the measurement probe output signal.
REFERENCES:
patent: 2779189 (1957-01-01), Corneil
patent: 3256734 (1966-06-01), Storke
patent: 3548637 (1976-12-01), Wicks
patent: 3648516 (1972-03-01), McRonald
patent: 3712116 (1973-01-01), Andre
patent: 3726126 (1973-04-01), Vittorio
patent: 3924448 (1975-12-01), Howard et al.
patent: 4062223 (1977-12-01), Lamphere et al.
patent: 4140396 (1979-02-01), Allington
Howard Robert G.
Zivi, Jr. Edwin L.
Marsh Luther A.
Moskowitz Nelson
The United States of America as represented by the Secretary of
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