Omega Products LV171 User Manual

OPTICAL LIQUID-LEVEL SENSOR

Double-Wall Pipe

LV 17 0

Fiberglass,

Double-Wall

Ta nk

Containment

Sump

Your Controls

Light

Lost in

Liquid

Liquid immersing

the sensing prism.

Receiver

Prism

LED

Light

from LED

Liquid below the

sensing prism.

Prism

Receiver

LED

Integral Pull

LV171, $144, shown larger than actual size.

⻬ Compact—Fits Interstitial

Spaces

⻬ Unaffected by Vapors,

Even at High Concentrations

⻬ Easily Removed,

Cleaned, and Reinstalled

⻬ No Moving Parts

The LV170 optical liquid sensor accurately detects the presence of liquid in fiberglass double-wall tanks, containment sumps, and double-wall pipes. Built-in electronic switching ensures dependability throughout its long service life. This reusable sensor easily fits small, interstitial spaces and senses liquid hydrocarbons or water. The unit is unaffected by hydrocarbon vapors,

Note: The LV170 sensor is a non-voltage-producing device and does not contain energy storing components. However, because primary use is in hazardous locations, an appropriate intrinsically safe interface device is required for its use.

thereby greatly reducing the risk of false alarms. The LV170 sensor is easy to remove, clean, and reinstall after an alarm condition is triggered, or for maintenance.

The LV170 electro-optical sensor contains an infrared LED and a light receiver. Continuous light from the LED is directed into a prism that forms the tip of the sensor.

If no liquid is present, light from the LED is reflected within the prism to the receiver. When rising liquid immerses the prism, the light is refracted out into the liquid, leaving little or no light to reach the receiver. Sensing this change, the receiver actuates electronic switching within the unit to operate an external alarm or control circuit.

Fiberglass Double-Wall Tank,

and Piping Sump Applications

LV170 Series

144

Containment Sump,

Double-Wall Pipe,

K-75

Zener Barrier*

Power

Supply

GND

Earth Ground

Black

Red

Switch

Output

SPECIFICATIONS

2-5/8" REF.

(66.7 mm)

Cable

1/8" DIA. Hole

Through

Removable

PVC

Pull Ring

Wetted Materials:

Polysulfone, PVC, epoxy

Operating Temperature:

-17.8 to 80°C (0 to 176°F)

Current Consumption:

Approximately 18 mA Output: TTL/CMOS compatible;

may sink up to 40 mA Cable: 3-conductor PVC jacketed

[7.6 m (25') extended] Approvals: UL for Class I,

Group D Hazardous Locations

Weight: 340 g (0.75 lb) Max Pressure: 150 psig

Integral pull

⁄

Electrical Parameters Entity Parameters for 10 to 28 Vdc Input

Terminal V

Red/Black 38V 150 mA 0.052 µf 0 White/Black 38V 150 mA 0.052 µf 0

≥ VOC(Barrier)

MAX

≥ ISC(Barrier)

MAX

CI+ Ccable ≤ C(Barrier) LI+ Lcable ≤ L(Barrier)

Definitions:

VOC= Maximum Open Circuit Voltage ISC= Maximum Short Circuit Current CI= Internal Capacitance LI= Internal Inductance

Typical Wiring Diagram

MAX

LV171, $144, shown larger than actual size.