Chapter 1: Introduction
The UL is an ultrasonic, continuous-level measurement gage. The unit is available
in two separate series: The Series ULB for solids and the Series ULF for fluids.
Depending on the series, the unit can be used for the following measurement tasks:
• Dust-free tanks with solids
• Open channel flow
• Liquid tanks with calm surfaces (upon request)
The ULF unit has a range of up to 49.21 ft (15 m) with an accuracy of 0.25% of the
maximum measuring range (version dependent).
The ULB unit has a range of up to 28 ft (8.5 m) with an accuracy of 0.25% of the
maximum measuring range (version dependent).
SPECIFICATIONS
Service:
ULB: Bulk solids, ULF: Compatible liquids.
Wetted Materials:
Sensor: Polypropylene, Acoustic Window: ECTFE.
Ranges:
(see “Measuring Ranges”).
Accuracy:
0.25% of max range (at 20°C).
Resolution:
0.04˝ (1 mm).
Blind Zone:
ULB-11 and ULF-X1-XXX: 0.8 ft (.25 m); ULB-12 and ULB-X2-XXX:
1.96 ft (0.6 m).
Beam Angle:
5° @ 3db point.
Temperature Limits:
-40 to 158°F (-40 to 70°C).
Temperature Compensation:
Automatic.
Pressure Limits:
13.5 psi (0.9 bar) to 30 psi (2 bar).
Power Requirement:
18 to 28 VDC.
Output Signal:
4 to 20 mA.
Max. Loop Resistance:
750 Ω at 28 VDC.
Electrical Connection:
Screw terminal.
Conduit Connection:
1/2˝ NPT conduit or cable gland (optional).
Process Connection:
2˝ NPT or 2˝ BSP (optional).
Enclosure:
Plastic enclosure: ABS and UV resistant body.
Enclosure Rating:
NEMA 4 (IP65).
Mounting Orientation:
Vertical.
Memory:
Non-volatile.
Display:
4 character LCD.
Units:
ft, m (upon request).
Programming:
4 button.
Weight:
3.1 lb (1.4 kg).
Measuring Ranges
Page 2
ULB for solids
ULF for fluids
Standard
Extended
Range
Short
Range
Standard
0.82 ft to 11.5 ft
0.25 m to 3.5 m
1.96 ft to 28 ft
0.6 m to 8.5 m
0.82 ft to 16.4 ft
0.25 m to 5 m
1.96 ft to 49.2 ft
0.6 m to 15 m
Figure 1 : Front and Side View
L-UL:SSS-1000 12/15/10 8:56 AM Page 3
