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,-sure e�conomtcal our fuel inventory the name implies. A float in the tank rides up and down the probe and is electronically connected to a console. The float level is translated into a volume measurement using a: conversion factor. The obvious drawback to this monitoring system is that a float can stick and provide erroneous readings. Tanks that are not level or that shift may also cause errors. Finally, float systems are gener- ally harder to install, less reliable and require difficult and costly calibration. Capacitive systems offer the advantage of no mechanical parts. A current that runs up and down the probe is con- stantly measuring the height of the product in the tank. Although capaci- tive technology is fairly accurate and reliable, there are a number of disadvantages. On-site tank informa- tion must be provided for factory cali- bration before the unit is even shipped. This extensive calibration makes instal- lation more difficult and expensive. In addition, capacitive systems are unable to compensate for various types and concentrations of fuel additives. Ultrasonic systems also have no me- chanical parts. Sound waves are trans- mitted through the product and the waves are measured to determine the height of the product in the tank. A series of pulses are measured and av- eraged for increased accuracy. Unlike many other systems, water volume can be detected and accurately measured with ultrasonics. And, because ultra - ti sonic systems are field programmable, different tank dimensions and uneven tanks will not decrease the accuracy of the readings. This highly accurate ultrasonic technol- oV is utilized in the GTM system from Tidel. Extensive research was con- ducted with the support of our parent company, The Southland Corporation. This research documented the clear technological superiority of the ultra- sonic method. This same technology has been designed into the GTM sys- tem to provide the most accurate and best value available today. Communications compatible. The GTM system from Tidel operates as a stand alone unit or can interface with off-site main frame or personal com- puters through the RS -232 communications port to form an inte- grated telecommuni- cations network. This computer networking feature al- lows inventory and security data to be monitored through yourregional of- fice. In addition, an RS -422 commu- nication port offers you interface ca- pabilities with a variety of electronic components such as POS equipment and fuel consoles. Installation breeze. Without shutting down your gasoline operation, Tidet's factory certified technicians can easily install the GTM system in as little as four hours for a standard three tank system. Probes are inserted into existing tanks Through a standard 4" riser. The compact console gives you the flexibility to design your system and program it to meet your specific requirements. Service ease. Professional service technicians are available for formal on-site training. These factory certified technicians are on -tine to provide nationwide service year round. Every service technician is equipped t install and service the GTM system. And, because the GTM system from Tidel features all electronic compo- nents, service is usually quick and eas a Y• The end of the stick. The GTM system from Tidel offers more features. More accuracy. More value. Take a closer look and you'll agree the time has come to put an end to the stick. Call Tidel Systems today to find out how you can put the GDA electronic monitoring system to work for you.