The VeriGAP level switch is the only safe gap
switch available for high-level alarming or
indication. All other gap switches are inherently
low-level failsafe only. With most low-level
failsafe devices, either an absence of material
or a component failure will indicate a low-level
alarm. With most high-level failsafe devices, the
presence of material will only trigger an alarm if the system is functioning properly. A component failure, such as separation of the crystals, will
cause the device to indicate an absence of material. This will result in a normal condition,
even if the tank is over-filling.