Fuel Sentry Tank Gauge and Leak Detection System
The Fuel Sentry Model TG-EL-D4A Tank Gauge and Leak Detection System is a remote reading, microprocessor based, tank gauge, with six intrinsically safe sensor inputs that can monitor one or two tanks.
- Automatic Delivery Detection
- Oil Delivery Verification / Shortage Detection
- Idle Tank Theft Alarm
- Overfill Alarm
- Easy to Read Bar Graph Display
- Six Intrinsically Safe Sensor Inputs
- Daily HD-A2-C Automatic Leak Sensor Testing
- Sensor Wiring Fault Detection
- Printer with Delivery, Consumption, Status, and Alarm Reports
- Field Configurable
The Fuel Sentry Model TG-EL-D4A Tank Gauge and Leak Detection System is a remote reading, microprocessor based, tank gauge, with six intrinsically safe sensor inputs that can monitor one or two tanks. The leak detection system is designed for use with double wall tanks, vaulted tanks, single wall tanks with spill basins, and double wall piping. The TG-EL-D4A is designed for use with all fuel oils (No. 2 through No. 6), diesel, kerosene, jet, and most other petroleum products. Tank gauges are required by NFPA 30 Flammable and Combustible Liquids Code and NFPA 31 Standard for the Installation of Oil-Burning Equipment, and NFPA 110 Standard for Emergency and Standby Power Systems.
Monitors one or two tank volumes via any combination of sensors
- TG-EL-WF-(7 or 12)-C wire float level sensor
- TG-EL-HLT-(9 or 14)-C drop-in head level sensor
- TG-EL-ULT-_-C ultrasonic level sensor
- Most other 4-20 mA level, head, bubbler, ultrasonic, or magnetostrictive sensors
Leak Detection Sensor Inputs
- HD-A2-C discriminating leak sensor
- RBS or PS-LDS float leak switch
- Most other contact closure leak sensors
- Leak sensor wiring fault detection
The TG-EL-D4A system consists of the indicator/monitor, optional printer, level sensor(s), leak sensor(s), and optional delivery flow meter. The TG-EL-D4A accepts up to 6 sensors in any combination. For example:
- Single Tank: (1) level, (1) head level, (4) leak
- Single Tank: (1) head level, (1) flow meter, (4) leak
- Dual Tank: (2) level, (4) leak (2 per tank)
Leak Sensor Testing: All leak detection systems must be tested periodically over the 20-30 year life of the tank. The Fuel Sentry can automatically test each HD-A2-C discriminating leak sensor every day and print the result. Inspectors can remotely initiate HD-A2-C testing from the Fuel Sentry at any time. Non-Discriminating (Wet/Dry) Leak Sensor Wiring Faults (opens or shorts) can be monitored, and alarmed, by the TG-EL-D4A if a model WFTN-1 network is installed at each sensor.
Oil Delivery Verification: With the high price of oil, it is important to pay only for the oil that is actually delivered. With a single level (or head) sensor, the TG-EL-D4A can automatically detect a delivery and print a time/date stamped ‘Gallons Delivered’ report which is used to verify the invoice before payment. The TG-EL-D4A can also accept a flow meter signal, in addition to a level sensor, for higher accuracy delivery reporting. Delivery ‘shorting’ by air injection, or waste fluid blending, changes oil density which makes the oil truck delivery meter reading inaccurate. With two sensors per tank: head plus either level or delivery flow, the TG-EL-D4A can note suspicious oil density changes on the ‘Gallons Delivered’ printed report.
Idle Tank Theft Alarm: If the gallons in an idle tank drop excessively, the TG-EL-D4A can activate a time/date stamped "Theft Alarm." An external “Tank is Idle” contact closure (from an emergency generator, pump set, or…) input detects small, slow volume changes. If this input is not available, the Fuel Sentry can trigger a Theft Alarm based on a higher than normal fuel consumption rate.
Overfill Alarm: The TG-EL-D4A can activate an FA-AV-x-D3 audible/visual overfill alarm located near the tank fill pipe to warn the driver to stop filling the tank. The audible alarm self-silences.
Data Logging, Printer, Communications: For a single tank configuration, the TG-EL-D4A automatically logs the following data into non-volatile memory:
- Last 2 inventories at midnight
- Last 14 deliveries with time/date
- Last 14 daily consumptions (midnight to midnight)
- Last 10 weekly consumptions (Sunday midnight to Sunday midnight)
For dual tank configurations, the data quantities are half of the above for each tank. The last 10 alarm (or status) messages are displayed with time/date stamp. Reports based on the above data can be automatically printed after every delivery, at midnight, after an alarm, or manually on demand. The data can also be read via RS485 Modbus (standard).
Fully Field Configurable: The TG-EL-D4A can be completely field configured from it’s LCD menus and keypad, or with the TG-EL-D4A_Edit PC-based software via the TG-EL-D4A USB port. Sensor type, function, channel, and calibration data can be configured. Relay functions can be assigned (high, overfill alarm, low, leak, theft, pump start, system error, …, common alarm). The 51-point stick chart (volume versus level) can be generated in 2 ways:
- Based on tank dimensions for standard shapes.
- Manually entered values from the tank manufacturer's stick chart.
The resulting stick chart can be printed on the optional printer.
The Fuel Sentry Tank Gauge and Leak Detection System is designed for use with double wall tanks, vaulted tanks, single wall tanks with spill basins, and double wall piping. It is designed for use with all fuel oils (No. 2 through No. 6), diesel, kerosene, jet, and most other petroleum products. Tank gauges are required by NFPA 30 Flammable and Combustible Liquids Code and NFPA 31 Standard for the Installation of Oil-Burning Equipment, and NFPA 110 Standard for Emergency and Standby Power Systems.
Input Power: 120 VAC +/-15%, 50/60 Hz, 21 VA
Case Size: TG-EL-D4A-00-x: 8” H x 3.5” W x 7.7” D, TG-EL-D4A-Ex-x: 16.5” H x 14.75” W x 9” D
Enclosure: NEMA 4 Faceplate
Ambient Temperature: 32° F to 122° F
Display: High contrast LCD 4” high, 0.5% resolution bargraph
Multi-purpose : 6 channels, I.S. Class I, Division 2, Group D
Contact Closure (3): 28.4 VDC, 26 mA
2 Wire 4-20 mA: 13 VDC @ 21 mA for each transmitter plus wiring, 0.006% resolution, 0.1% accuracy
Contact Closure: 3 channels, non-I.S., non WFTN-1
1 Channel: 120 VAC, 10 mA
2 Channel: 15 VDC, 30 mA
Relays (8 total): 2 channels SPDT, 10 A res., ½ HP, 120 VAC 4 channels SPST NO, 1.5 A pilot, 120 VAC
4-20 mA: 2 channels 650 ohms max, volume or depth
USB: TG-EL-D4A_Edit PC software
RS485: Modbus, ASCII or RTU 1200-38400 baudPrinter Specifications
Input Power: 120 VAC +/-15%, 50/60 Hz, 20 VA
Case Size: 4.6” H x 4” W x 2.8” D
Enclosure: NEMA 1
Ambient Temperature: 32° to 122° F
Printer Paper: 2.3” W, thermal, 30 columns