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Uehling

Manufacturers of Liquid Level Gauges, Instrumentation & Controls. High/low Alarm Systems, Float, Ultrasonic and Pressure Switches, Panel mounted Gauges, Alarms with digital/analog displays & computer interface. Standard and custom enclosures for single or multiple gauge & alarm systems rated for NEMA 4 Watertight and NEMA 7 Explosion Proof classified location application. Also Draft, Inclined, Vacuum, Pressure & Absolute Pressure Gauges, Manometers & Barometers.

Liquid Level Measurement
...Anywhere

The Tank-O-Meter^® is used extensively throughout the Dairy, Food, Chemical and Pharmaceutical Industries, along with the U.S. Navy, Commercial Marine, Power Plants, Cosmetic Manufacturing Plants, Municipalities, Water Treatment Facilities, Distilleries, Breweries, and wherever there is a need to measure liquid level.

Several Level Measurement Configurations

See Page Below

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.

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).

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.

How does is work? The sensor produces ultrasonic pulses. The liquid reflects the pulses. Reflected pulses are sampled and processed to determine the current level and simultaneously compensated for temperature fluctuation. A signal is subsequently sent to the digital display where it is converted and displayed in any single or dual engineering unit. (i.e. inches/Gallons; mm/Liters, etc.) Non-linear calibration for virtually any shape thank is optional.

Ultrasonic Diagram

Type "U" Ultrasonic Digital Tank-O-Meters^® are provided with (2) user programmable setpoint relays. (For alarms, pump/valve on/off, maintaining levels)

Level Alert Alarm

How does it work? When an alarm condition is sensed by Level Alert, an audible alarm sounds and a message pad flashes to inform the user why the alarm has sounded. A reset push-button silences the audible alarm. Thereafter, the message pad(s) remain illuminated until the alarm condition has been corrected. Should another channel(s) sense an alarm condition, the audible alarm will again sound and the corresponding message pad will flash until reset/acknowledged by the operator.

Level Alert Alarms are designed to activate upon receipt/loss of continuity^* (N.O. or N.C. contact), voltage^** input (24, 115 VAC or DC) or 4-20mA^*** low/high current loop status. This flexibility permits universal application. Uehling Type "S", Bar Graph and Digital Tank-O-Meters^®, Digital Pressure Gauges, Float Switches, etc., may be used to activate Level Alert Alarms. Each channel has an output relay for actuating other relays, pumps, valves, etc.

Continuous Level Float Digital Tank-O-Meter Tank Level Gauging System

Type “CLF” Digital Tank-O-Meter Tank Level gauge provides continuous level monitoring of almost any liquid. Tanks can be vented or under pressure. The length of the Continuous Level Float can be from 12” to 96”. The system can be supplied with a 3- Digit 16 bit high resolution display calibrated in inches or percent full or a 6 digit 16 bit high resolution display calibrated in inches, gallons, pounds or any other engineering unit of measure. The 6-digit display comes with 4-isolated 4-20 mA analog outputs and (4) user adjustable relays. The system can be supplied in NEMA 12 (Indoor) or a NEMA 4 (Watertight Outdoor) enclosure. Installation is simple and can be performed while the tank is in service.

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