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Just install our product and turn power on. It will be working for you! It's that easy to use.

UL-1000 Series Continuous Level Sensor:

Use this product as ultrasonic non-contact tank level sensor & indicator, tank level gauge & monitor, overflow spill control.

Our Motto: Just install UL-1000 and turn power on. It will be working for you! It’s that simple.




Used to continuously monitor (sense) and indicate level, depth or volume of liquids, slurries or solids in tanks. The basic difference between models is the tank height.

The sensing is non-contact

Transducer is mounted above the highest level in tank and thus will not touch the material. The monitor transmits an ultrasonic signal directed toward the monitored surface and measures the time to receive the reflected echo. The time is then converted to depth or level of liquid in tank. This enables an accurate measurement over the entire range.

The sensors are heavy duty

Designed for durability in harsh industrial environments. Installed properly, they will operate trouble free for a long time, requiring no maintenance. Breakdowns are minimized by a conservative design and many years of field-proven test experience. The sensors are immune to acoustic and electrical noise and turbulence. They are not affected by radio, radar or microwave transmission.To assure a trouble free operation, the circuit has several frequency filters, signal integrator, missing ultrasonic pulse detector, automatic gain control, temperature compensation, signal averaging and output damping for a steady indication. On-board RED indicating light allows checking the operation at glance, blinking light announces every valid echo received.

The transducers are industrial grade

Hermetically sealed, non-corrosive in a PVC housing (std.), 316 stainless steel, Teflon or Kynar. All are intrinsically safe with one model in 316 stainless steel housing approved for Class I, Groups A, B, C & D hazardous environments. The transducer is connected to the controller via a coaxial cable and can be remotely mounted up to several hundred feet, depending on model. Please, see the Transducer page for detailed information.

More about ultrasonic level sensor applications

Here is how we serve customers

Any questions? Call 941-964-1361. Or EMAIL US.


Since 1984


  • Digital Indication of Level or Volume in tank.
  • High and Low alarm relays.


  • UL-1000 ……… 0-15 feet tank height
  • UL-2000 ……… 0-40 feet
  • UL-3000 ……… 0-80 feet


+/- 0.25% of span


+/- 0.15%


120 VAC +/- 15%, 10VA (std.)
220 VAC +/- 10% (opt.)
12 VDC or 24 VDC (opt.)


Outdoor NEMA-4X, IP65, 9″x7″x4″.
Operating temperature -20 F to +150 F.


With UL-1000 …. #7508, PVC housing, 9″ blind zone, 2″ diameter, range to 15 feet.
With UL-2000 …. #4012A, PVC housing, 16″ blind zone, 3″ diameter, range to 55 feet.
With UL-3000 …. #2310, PVC housing, 21″ blind zone,
range to 80 feet.


#4012BS = 316 stainless steel housing.
#4012BS/CSA = explosion-proof, 316 SS, CSA approved for all Class I, Groups A, B, C & D. Ranges to 35 ft, blind zones 15″-18″; both above.
#7508-Teflon = full Teflon housing, 9″ blind zone.
#4012-Teflon = full Teflon housing, 18″ blind zone.
#2006 = PVC housing, range to 5 ft., blind zone 5″.

See TRANSDUCERS for detailed description and dimensions.
For suggested transducer mounting, Click Here.


RG62/U or RG62/A, 30 ft. attached with transducer. Longer cables available when ordered.


8-digit LCD level (depth) display in inches, feet or meters (std.). Optional volume display in gallons, liters, and barrels.


Two adjustable relays with 50W, SPST contacts, independently adjustable. Configured for High and Low alarm.


  • 4-20 mA current output into 400 Ohms.
  • 1-5 VDC output.
  • RS232C computer connectable output.

If you need to purchase alarm lights, buzzers, additional cable and other to use with our tank level sensors, we have provided some links for your convenience. Please click here.


18 months from the date of shipment under normal use. The warranty carries no liability, expressed or implied, beyond the obligation to repair or replace the part under warranty.