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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

HD-A2C Oil & Water Leak Detector

The Model HD-A2-C Leak Detector uses a combination electro-optic technology, which reliably distinguishes between water and oil. The detector contains  an infrared optical liquid detector and a set of stainless steel conductivity rings. Oils are detected by the optical liquid detector and water is detected by both the optical liquid detector and the conductivity rings.

Ruggedly constructed, with no moving parts, the solid-state HD-A2-C Leak Detector provides reliable and cost-effective performance. The system is suitable for all grades of oil, including No. 6 and gasoline.

Application

Model HD-A2-C Leak Detector – Up to six HD-A2-C Leak Detectors can be connected to a single TG-EL-D4A Tank Gauge and up to 12 Leak Detectors can be connected to a single TG-EL-D5 Tank Gauge. The detectors monitor for leaks through the inner-wall (oil) or outer-wall (groundwater) of double walled tanks; oil or water leakage into the piping annular space; ground water leakage into a sump. Typical installation areas include:

  • Fiberglass or Steel Tank Annular Space
  • Piping or Containment Sump
  • Vault Spaces

Features

  • Uses Combination Electro-Optic Technology
  • Detects Oil by Optical Liquid Detector; Water by Optical Liquid Detector and Conductivity Ring
  • Suitable For All Grades of Oil, Including #6 and Gasoline
  • Typical Installation Areas Include: Fiberglass or Steel Tank Annular Spaces, Vault Spaces

Overview

The Model HD-A2-C Leak Detector uses a combination electro-optic technology, which reliably distinguishes between water and oil. The detector contains  an infrared optical liquid detector and a set of stainless steel conductivity rings. Oils are detected by the optical liquid detector and water is detected by both the optical liquid detector and the conductivity rings.

Ruggedly constructed, with no moving parts, the solid-state HD-A2-C Leak Detector provides reliable and cost-effective performance. The system is suitable for all grades of oil, including No. 6 and gasoline.

Up to six HD-A2-C Leak Detectors can be connected to a single TG-EL-D4ATank Gauge and up to 12 Leak Detectors can be connected to a single TG-EL-D5 Tank Gauge. The detectors monitor for leaks through the inner-wall (oil) or outer-wall (groundwater) of double walled tanks; oil or water leakage into the piping annular space; ground water leakage into a sump. Typical installation areas include:

  • Fiberglass or steel tank annular space
  • Piping or containment sump
  • Vault spaces

Water/Oil Leak Discrimination: Upon the detection of oil or water in a monitored space, the HD-A2-C indicating transmitter will show an oil or water light and send a signal to the TG-EL-D4 A or TG-EL-D5 Tank Gauges.

Continuously Checked: The integrity of the leak monitoring control loop is continuously checked electronically. In normal standby operation, the loop is continuously powered with the light sensor seeing the light from the source. An open or short in the field wiring or failure of the light source or sensor will alert the plant operator by activating the visual/audible leak alarm at the Tank Gauge.

Periodic Manual Testing: Recognizing that the HD-A2-C leak detector may not be required to automatically alarm for years, a magnetic test switch on the HD-A2-C transmitter enables periodic manual testing. By actuating the test switch, without disturbing the installation, the HD-A2-C, connecting wires and the Tank Gauge leak alarm sequence are fully tested. The magnetic switch maintains the
waterproof barrier.

Specifications:

Solid State:  No moving parts, fail safe
Leak Indications: Red for oil, Yellow for water
Detector Test Switch: Integral
Sensor Cable: 2 wire, shielded, suitable for direct burial or conduit installation, Max. length 800 feet
Splice Kit: Sensor type
Water Detection: Conductivity
Oil Detection: Electro-optics
Wetted Parts: Stainless Steel, Epoxy Resin or Polypropylene
Fluid Temperature: 135° F maximum

Transmitter
Temperature: -5° F to 122° F
Tank Mounting: 2″ tank opening minimum. Other areas such as steel tank sumps, double wall pipe or tank vaults require ¾” NPT minimum

Specifications

Provide and install leak detectors in the annular space within the double wall tank (the piping sump and double wall containment piping, etc., as shown on the drawing).  The leak detectors shall be solid state and discriminate between oil and water, display the leak with (2) LED’s on its indicating transmitter, and send an appropriate alarm signal to the Tank Gauge. All leak detectors shall be intrinsically safe, have continuous electronic checking, fail safe to an alarm condition, and have indicating transmitters with a magnetic test mechanism at grade level to exercise the sensors and check the Tank Gauge response. Test systems that bypass the sensors or rely only on electronic simulation are unacceptable. The leak detectors shall be Preferred Utilities Mfg Corp., Danbury, CT, Model HD-A2-C.

When the leak detector is to be mounted in manways, piping sumps, steel tanks, floor or vault containment areas, include a  leak detector guard. The leak detector guard shall protect the leak detector from mechanical damage and exposure to direct sunlight. Leak detector guard shall be Preferred Utilities Mfg Corp., Danbury, CT, Model HD-HSG.