Digital Tank-O-Meter

Enclosed Digital Tank-O-Meter for tanks, wells, sumps, watertowers, lakes density (specific gravity) and pressure measurement

Liquid Level Measurement...Anywhere

Digital Tank-O-Meters^® accurately measure tank contents regardless of the tank location in relation to the Digital Display. They are a natural extension of Uehling's well known and time proven line (since 1896) of Tank-O-Meter^® gauge products.

Systems are also available as a retrofit addition to existing gauge installations operating on the hydrostatic principle. Digital Tank-O-Meters^® are often used with existing conventional gauages to create a backup system, allow comparison readings to assure accuracy, and take advntage of the analog output as well as the built-in high/low level alarm or switch capabilities.

Uehling's Digital Tank-O-Meter^® is suitable for use througout the Chemical, Petrochemical, Marine, Food, Dairy, and Pharmaceutical Industries, along with Power Plants, Cosmetic Manufacturing Plants, Municipalities, Waste and Water Treatment Facilities, Distilleries, Breweries, and wherever there is a need to measure liquid level.

Features

Digital display is factory calibrated to any tank configuration to insure accurate readings in inces, gallons, pounds, centimeters, liters, kilos, etc.
Local or remote mounting: Digital Display can be virtually any distance from the tank.
High/low level limit circuitry is standard and user adjustable (for level alarms, operate relays, start/stop pumps, open/close valves).
Three system configuration to choose from:
1. Pneumatic Signal Reading
2. Direct Reading
3. Retrofit addition to existing Tank-O-Meter or other hydrostatic principle gauge systems.
Serial RS232 and/or 4-20 mA, 0 to 5 Volt, 0 to 10 Volt analog output for communication with PCs, data acquisition systems, PLCs, chart recorders, multiple display locations, etc.
Uses accurate and dependable hydrostatic principle.
Installation is quick and easy while the tank is in service.
Tanks may be open, closed, vented, at ground level, buried, elevated, under pressure or vaccuum.
Any tank configuraiton; horizontal, vertical, etc.
Centrally located Panel Board mounted displays with or without alarms, relays, horns, reset push-button, etc., as required are available for single or multi tank installations.
There are no moving parts that wear out or hang-up to cause false readings.
Avoid costly and dangerous overflowing of tanks.
Use with existing conventional gauges to create a backup system, allow comparison readings to further assure accuracy and simultaneously take advantage of the high/low level alarm, switching capability and analog output.
Keep accurate inventories, avoid down time due to lack of supply.
Foaming products are read accurately and easily (versus sonar or "stick" readings).
Determine proper ratios in mixing process.

Pneumatic Signal Reading

Open to atmosphere | 2-line system

When a tank is 100% vented to atmosphere, the Digital Tank-O-Meter^® is operated using a two-line system. Air is introduced into line "B" which will force the liquid being measured out of the pressure pipe. The pressure created in the pipe (the head pressure) returns to the transducer through line "A", is converted to an electrical signal and the Digital Tank-O-Meter^® displays the corresponding liquid depth or volume.

Closed to atmosphere | 3-line system

When a tank is not 100% vented to atmosphere at all times, the Digital Tank-O-Meter^® is operated using a three-line system. Lines "A" and "B" have the same function as in the two-line system. A third line "C" is added to segregate pressure or vacuum above the liquid in the tank from the head pressure.

Installation...

...for your factory calibrated Digital Tank-O-Meter^® may be performed while the tank is in service. Uehling Instrument can supply everything needed to connect the system. Installation is simple and quick, requiring no special tools or skills. Systems often can be installed and operating in less than one hour.

Digital Tank-O-Meters^® for Fuming Corrosive Liquids | Tanks Open to Atmosphere

Two types of ("O") Digital Tank-O-Meters^® are available for open tanks (100% Vented to Atmosphere) containing Hot Water, Hot Plating Solutions, Acids, and similar liquids. These applications require a continuous purge system to avoid condensation of vapors in the air lines. A minimum of 3/8" air line between the Digital Tank-O-Meter^® and the tank is required. Continous air purge consumption is approximately .5 SCFH.

Gauges with Bubbling Bottles (add "O" to model number e.g. 10VV-O) are used with general plant air systems. The bubbling bottle oil serves as an indication of the purge rate in addition to removing dirt and blocking moisture from entering the system. When plant air has particularly high dirt and moisture content, a combination Air Filter/Regulator/Condensate Trap may additionally be required upstream from the Bubbling Bottle.

Gauges with a Tel-Flo meter (add "NO" to model number e.g. 10VV-NO) are designed for clean dry air, instrument air or inert gas systems where tank content purity must be maintained. A combination Air Filter/Regulator/Condensate Trap may optionally be required.

Closed to atmosphere

Digital Tank-O-Meters^® for Fuming Corrosive Liquids | Tanks Closed to Atmosphere

Two types of equalized ("OE") Digital Tank-O-Meters^® are available for closed tanks containing Hydrochloric Acid, Nitric Acid, Phenol and other corrosive fuming liquids.

In order to keep vapors contained in the tank, a continuous purge system using inert gas or air is necessary. The purge system requires either double Bubbling Bottles or double Tel-Flo meters to segregate pressure, vacuum or blanket pressure above the liquid from the tank liquid level (head pressure). Systems with double Bubbling Bottles consume approximately 1 SCFH (double Tel-Flo's approximately 2 SCFH) and require a minimum of 3/8" air line.

Systmes with double Bubbling Bottles (add "OE" to model number e.g. 10VX-OE) are useful with general plant air systems. In some cases, a combination Air Filter/Regulator/Condensate Trap may additionally be required upstream from the Bubbling Bottles when plant air has particularly high moisture and dirt content.

Systems with double Tel-Flo meters (add "NOE" to model number e.g. 10VX-NOE) are used with clean dry air, instrument air or inert gas, where tank content purity must be maintained. A combination Air Filter/Regulator/Condensate Trap may be optionally required.

Input Manifold/Transducer Mounting Block

The combination Input Manifold/Transducer Mounting block permits easy connection of pneumatic signal lines; simple wall mounting; electrical connection of the transducer as well as the input connection of inert gas to Tel-Flo meter(s) or shop air for bubbling bottle(s).

Direct Reading System

How does it work?

A pressure transducer is mounted or submerged at a known location near or at the bottom of the tank. Pressure from the liquid level (head pressure) is converted to an electrical signal that is sent to the Digital Display module. The electrical signal is then conditioned/scaled and, if required, compensated for non-linear tank configuration (calibrations where the weight or volume per cubic unit of depth varies) in the required unit of measurement and displayed by an easy-to-read 4-1/2 digit display. Direct Reading Systems are intended for measuring clean, non-corrosive liquids.

Direct Threaded Mount

The pressure transducer is mounted to a threaded opening at a known location on the tank, or watertower. This type of system is designated by the letter "D" preceding the model system range -- e.g. D-10VVI. An Isolation and Air Bleed Valve assembly is optionally available to allow removal of the transducer without draining the tank.

Direct Flanged Mount

The pressure transducer is mounted to a Class 150 ANSI Flanged opening at a known location on the tank. Units are standard with an internal amplifier for a remote display. This type of system is designated by the letters "DF" preceding the model system range -- e.g. DF-10VVI.

Direct Sanitary Flanged Mount

The pressure transducer is mounted to a CIP (clean in place) Sanitary Flange opening at a known location on a vented tank. Units are standard with an internal amplifier for a remote display. This type of system is designated by the letters "DSF" preceding the model system range -- e.g. DSF-10VVI.

Direct Submersible

Some applications like underground tanks and wells do not permit easy access for mounting a transducer on the side or bottom. In this case a submersible transducer is mounted on a pipe of suitable material and lowered from the top into the tank through a 2" NPT opening. The pipe protects the electrical signal cable and also holds the transducer in its proper location. Direct Submersibl units are standard with an internal amplifier for a remote display and a minimum of 15 feet of signal cable. Additional lengths are optionally available. This type of system is for vented tanks only and is designated by the letters "DS" preceding the model system range -- e.g. DS-10VVI.

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