Chinese (Simplified)EnglishFrenchGermanHindiItalianJapaneseKoreanPortugueseRussianSpanish

Preferred Utilities

Preferred Utilities engineers and fabricates fuel oil handling systems for diesel generators and dual-fuel fired boilers for mission critical facilities such as data centers, hospitals, and emergency response facilities. Our engineers specialize in mission critical fuel oil system design so they are current with the latest industry practices and fire protection codes. In addition, Preferred Utilities offers a wide variety of fuel oil system components designed to meet the unique requirements of our fuel oil customers. Preferred Utilities' industrial factory is located in Danbury, CT

Liquid Level Switch

The Model PLS Liquid Level Switch provides up to six independent liquid level switches on one sealed probe up to 72″ in length.  Magnetic reed switches are encapsulated in the sealed brass probe where they are protected from liquid and vapors.

 

Application

The Model PLS Level Switch may be used with any clean, low viscosity, non-adhering fluid compatible with brass, solder, epoxy and Buna-N.  It is commonly used on fuel oil day tanks to control the addition of oil from remote pumps, and to alarm  high and low levels.  Other applications include pressurized or vented tanks for water, hydraulic fluid, lubricating oils or distillate fuels.  Insert the unit vertically and then thread it into a 1 ¼” NPT half coupling on the tank shell.  The wiring enclosure is not designed to be submerged.  A suitable protective enclosure for access such as the Preferred Sidewalk Box Model 13071 should be provided when installing underground.

Overview

The Model PLS Level Switch provides up to six independent liquid level switches on one sealed probe up to 72″ in length.  Magnetic reed switches are encapsulated in the sealed brass probe where they are protected from liquid and vapors.  Buna-N floats, containing magnets, slide on the outside of the brass probe.  A rising liquid level causes each float to rise to its upper travel stop position where it actuates a switch.  Any switch may be specified “open” or “closed” with the float at its lower stop position.

Features

Fluid Temperature:  180° F Maximum

 

Fluid Specific Gravity: 0.5 Minimum

 

Fluid Pressure:  150 PSI Maximum

 

Electrical:  100W at 120 VAC Resistive 8VAC Relay Coil Pilot Duty

 

Switch Action:  Can Be N.O. or N.C.

 

Housing:  Cast Aluminum, UL Listed

 

Wetted Parts:  Brass Probe And Buna-N Float

 

  • Custom Fabricated Up To 72″ In Length
  • May Be Used With Any Clean, Low, Viscosity, Non-Adhering Fluid
  • Switches May Be Specified “Open” Or “Closed”

 

Specification

The tank level control shall be Model PLS-XX-Y (XX” long with Y switches) as manufactured by Preferred Utilities Mfg. Corp. Danbury, CT. Control shall be float operated, installed through and threaded into a single 1 ¼” tapping on the top of the tank, shall be suitable for pressures up to 150 psig and temperatures up to 180˚F and shall be entirely of nonferrous material with __ switches each rated at 100 Watts. Mounting:  1¼” NPT Coupling