UST Overfill Protection

The Veeder-Root Overfill Protection Solution is a combination of the TLS Overfill Alarm Unit and optional Alarm Acknowledgment Switch.  The Veeder-Root Overfill Protection Solution is an electronic external alarm system designed to alert the fuel delivery and facility operators that a fuel tank is exceeding a predetermined level during a product delivery. This device can be used as well to meet overfill prevention equipment requirements.

Real-time monitoring of Overfill Conditions 

Paired with any Veeder-Root Automatic Tank Gauge (ATG), the TLS Overfill Alarm solution can be activated using an assigned relay to sound an audible (horn) and visible (red light) alarm when the tank receiving a delivery reaches 90% capacity. It utilizes the real-time inventory level of the tank probe to issue an instant alarm when capacity is reached. 

Product Form

Part Number



Overfill Alarm Box


Overfill Alarm Acknowledgement Switch / Reset


Key Features

  • Economic solution that allows alerting of multiple tanks

  • Periodic testing is easy and does not require spare parts

  • Not susceptible to failures from tank tightness or pressure

  • Meets revised 2015 EPA UST regulations for overfill protecting equipment when used alone or in conjunction with an automatic shutoff device

  • Allows user to program individual alarm levels for each tank onsite

  • Weatherproof Construction

  • LED Light Bulb with a longer life span, increased energy efficiency and durability, with no UV ray emission and minimal heat generation.


Overfill Alarm Box

Console Compatibility

  • TLS-450PLUS

  • TLS4 / TLS4B

  • TLS-350 Series

  • TLS-300 Series

  • TLS-2 Series

Audible Alarm Noise Level

78 – 103dB at 10ft.

Audible Alarm “Time On”

Adjustable from 0-60 Seconds

Visual Alarm Lamp Rating

25 watt, 120 VAC Lens

Visual Alarm Flashing Rate

75 per minute

Alarm Unit Dimensions

10.3"L x 8"W x 4"D

Lens Dimensions

4”Æ x 3.5”D

Operating Temperature Range

– 40 ° C to +65 ° C / - 40 ° F to +150 ° F

Supply Voltage

120 VAC, 50 / 60 Hz

Overfill Alarm Acknowledgement Switch / Reset

Alarm Unit Dimensions

6.8"L x 4.3”W x 3"D

Operating Temperature Range

– 40 ° C to + 65 ° C / - 40 ° F to + 150 ° F

Supply Voltage

120 VAC, 50 / 60 Hz

Acknowledgment Lamp

120 VAC, Amber Lens