dploof23
Member
Does anyone know of a hydrometer with an analog output that I could use to monitor the density of a liquid in a tank?
-Dave
-Dave
Hydrometer
- Thread starter dploof23
- Start date
widelto
Member
I have used a flowmeter to measure density of liquids traveling thru a pipe. May be this option can serve your purposes. They have both ouputs 4-20 mAmps and HART.
danw
Lifetime Supporting Member
If it's an aqueous, water based solution, then K-patents has a densitometer based on optical refraction.
http://www.k-patents.com/
Dual bubbler tubes at different elevations were used for years where the difference in head pressure between the tube elevations will reflect specific gravity (SG) when measured in inches of water column because water's SG = 1.000. If the tubes are 36.00" apart in elevation, and the head pressure is 39.00"w.c. then the SG = 39/36 or 1.083.
Hydostatic tank gauging using a DP transmitter with its high and low ports installed at different elevations on the same tank to make exactly the same calculation - SG. The further apart in elevation, the better the reading, but the higher the minimum level required to maintain a reading.
My one experience with hydrostatic tank gauging worked well once the tank could be calibrated by filling it with water and getting a baseline reading with water. Determining exact mounting dimensions to get the exact difference in elevation is problematic (where exactly on a DP diaphragm does a DP xmtr read zero?), it's much easier to 'wet' calibrate insitu.
http://www.k-patents.com/
Dual bubbler tubes at different elevations were used for years where the difference in head pressure between the tube elevations will reflect specific gravity (SG) when measured in inches of water column because water's SG = 1.000. If the tubes are 36.00" apart in elevation, and the head pressure is 39.00"w.c. then the SG = 39/36 or 1.083.
Hydostatic tank gauging using a DP transmitter with its high and low ports installed at different elevations on the same tank to make exactly the same calculation - SG. The further apart in elevation, the better the reading, but the higher the minimum level required to maintain a reading.
My one experience with hydrostatic tank gauging worked well once the tank could be calibrated by filling it with water and getting a baseline reading with water. Determining exact mounting dimensions to get the exact difference in elevation is problematic (where exactly on a DP diaphragm does a DP xmtr read zero?), it's much easier to 'wet' calibrate insitu.
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