UL-1000 Series Continuous Level Sensor:
Models UL-1000, 2000 and 3000
are 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
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, squelch filter, signal
integrator, missing ultrasonic pulse detector, automatic gain control, temperature
compensation, signal averaging and output damping for a steady indication.
Two on-board indicating lights allow checking the operation at glance; the
green light announces every transmitted signal while the red 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.
suggested transducer mounting,
UL-1000 ......... 0-15 feet tank height
UL-2000 ......... 0-40 feet
UL-3000 ......... 0-80 feet
(UL-1000 with 200 KHz transducer ... 0-5 feet)
Note: When monitoring solids, the above ranges should be arbitrarily reduced
to approximately 50%. Contact us for details.
ACCURACY: +/- 0.25% of span
REPEATABILITY: +/- 0.15%
POWER: 115 VAC +/- 15%, 10VA (std.)
220 VAC +/- 10% (opt.)
12 VDC or 24 VDC (opt.)
ENCLOSURE: Outdoor NEMA-4X, IP65, 9"x7"x4".
Operating temperature -20
to +150 F.
With UL-1000 .... #7508, PVC housing, 9" blind zone,
2" diameter, range to 15 feet.
.... #4012A, PVC housing, 18" blind zone, 3"
diameter, range to 55 feet.
#2310, PVC housing,
21" blind zone,
range to 80 feet.
for detailed description
suggested transducer mounting,
Digital Indication of Level.
High and Low alarm relays.
1-5 Volts output
computer connectible output
SPECIFICATIONS - continued:
#4012BS = 316 stainless steel housing.
#4012BS/CSA = 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".
TRANSDUCER CABLE: RG62/U, 30 ft. installed with transducer.
Longer cables available when ordered.
OUTPUT: 8-digit LCD display, in
feet (std.). Optional display
in inches, gallons, liters and meters.
ALARM RELAYS: two adjustable set
points with 50W SPST relays, independently adjustable.
Configured for High and Low alarm.
4-20 mA current output into 400 Ohms.
1-5 VDC output.
RS232C computer connectible output.
WARRANTY: 18 months from the day of
shipment under normal use. The warranty carries no liability, expressed or
implied, beyond the obligation to repair or replace the part under warranty.