Omega Products LVU-230S User Manual

Ultrasonic liqUid level switches

SPECIFICATIONS

Repeatability: 2 mm

(0.08") typical

LVU-230/

260 Series

U 1000:1 Wet-to-Dry Ratio

with 316 SS Machined Body Sensor

U Epoxy Painted Enclosure U No Calibration or

Special Installation Requirements

U AC or 9 to 36 Vdc

Powered Models

U Standard

The LVU-230 and LVU-260 liquid level switches are the ideal solution to a host of liquid-level sensing and control applications. Their small size and standard 3⁄4 NPT ﬁttings make them suitable for new or existing applications. The LVU-230 models have a relay output along with a 316 SS or PVDF sensor and an integral miniaturized, encapsulated electronic control unit mounted in a cast aluminum, explosion-proof, watertight enclosure. The LVU-260 is a 2-wire, 4 or 20 mA output system.

Both use an ultrasonic wave propagation sensor mounted in the liquid medium. The electronics generates a continuous wave ultrasonic signal that completely illuminates the liquid-sensing area. The absence of liquid in the sensing area causes the ultrasonic signal to dissipate, which the electronics senses as a “dry” condition (and provides a 4 mA output signal in the LVU-260). When liquid is present, the amplitude of the ultrasonic signal increases, indicating a “wet” condition. This signal is converted by the electronics and energizes the 10 A relay (LVU-230) or a 20 mA output signal (LVU-260). The LVU-230 electronics may be set to provide the control output to an alarm, pump, or other device on either a dry or wet condition.

⁄4 NPT Fittings

Delay (On): 0.5 s Input Power: LVU-230: 115 Vac 50/60 Hz

standard; 230 Vac 12 Vdc, or 24 Vdc (optional)

LVU-260: 9 to 36 Vdc Outputs: LVU-230: 10 A DPDT LVU-260: Low-level fail-safe:

4 ±1 mA dry; 20 ±1 mA wet; high level: 20 ±1 dry, 4 ±1 wet

Dimensions: mm (inch)

96.5

(3.80)

131.6 (5.18)

“A”

ALARM POINT

22.2

(0.88)

38.1

(1.50)

24.1

(0.95)

¾ NPT THREAD

¾ NPT THREAD STANDARD

MATERIAL

316 SS PVDF

(-40 to 300°F) Electronics: -29 to 77°C (-20 to 170°F)

Operating Pressure: Up to 1000 psig

Mounting: 3⁄4 NPT standard Weight: 453 g (1 lb)

LVU-230S, shown smaller than actual size.

Housing: NEMA 4/NEMA 7

watertight, explosion-proof enclosure, cast aluminum Class I, Group C and D, Class II, Groups E, F and G; and Class III, Division I and 2 Sensor Material: LVU-230S, LVU-260S: 316 L SS LVU-230K, LVU-260K: PVDF

Temperature: Sensor: -40 to 149°C

To Order Visit omega.com/lvu230_260 for Pricing and Details

115 Vac Power 9 to 30 Vdc Power Model No. Model No. Immersion Length cm (inch) “A” Stainless Steel

LVU-230S LVU-260S 7.62 (3) LVU-231S LVU-261S 15.24 (6) LVU-232S LVU-262S 30.48 (12) LVU-233S LVU-263S 45.72 (18) LVU-234S LVU-264S 60.96 (24) LVU-235S LVU-265S 91.44 (36)

PVDF

LVU-230K LVU-260K 7.62 (3) LVU-231K LVU-261K 15.24 (6) LVU-232K LVU-262K 30.48 (12) LVU-233K LVU-263K 45.72 (18) LVU-234K LVU-264K 60.96 (24) LVU-235K LVU-265K 91.44 (36)

Comes complete with operator’s manual. Other materials and lengths (up to 120") available. Consult OMEGA ﬂow Engineering Department.

For 230 Vac operation, add sufﬁx “-230V” to model number, for additional cost. For 24 Vdc operation, add sufﬁx “-24V” to model number, no additional cost. For 12 Vdc operation, add sufﬁx “-12V” to model number, for additional cost.

Ordering Examples: LVU-265S, 316 stainless steel, 2-wire, 4 to 20 mA output sensor,

91.44 cm (36")�sensor immersion length. LVU-230S, 316 SS sensor with 10 A relay.

K-34