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Description: <br />The Model 408 Latching Sensor is a two-part modular system that was specifically <br />designed to monitor impact at fuel dispensers and deactivate the appropriate electrical <br />power lines when the impact is above a preset level. When impact exceeds this level, the <br />Model 408 latches off and must be manually reset to restore power. <br />The intrinsically safe sensing probe is rigidly attached to the dispenser's frame at a point <br />1' to 2' above the island concrete in a vertical position. This sensor is very sensitive to <br />vertical movement and relatively insensitive to horizontal movement. This makes it ideal <br />for monitoring vehicular impact and seismographic activity while remaining immune to <br />normal dispenser rough handling. <br />The Model 408 utilizes the same controller as our Model 406 Pump Cut -Off and the controller <br />will drive both sensors if you require liquid detection as well as impact detection. The controller, <br />which provides an intrinsically safe barrier, operates on either 120 or 240 volts and should be <br />mounted below grade. The controller should be rigidly anchored to the island concrete and the <br />dispenser conduit should feed the controller before continuing on to the dispenser. The controller <br />is fully encapsulated and is approved for use in Class 1, Group D environments. <br />The Model 408 has been third party tested, and data is available from the factory showing <br />3 -axis response levels at a variety of frequencies. The sensor can be factory set to respond <br />to custom "G" levels or Richter numbers. The Model 408 system is patent pending. <br />An adapter kit Model 406A is available to allow the Model 408 to also monitor the <br />dispenser containment pan for accumulation of liquids. <br />