When equipped with an overfill alarm, when must the alarm trigger?

An overfill alarm is a critical safety feature in tank systems designed to prevent the tank from spilling its contents. The proper triggering point for such alarms is set to ensure that there is enough warning to avoid overfilling.

Triggering the alarm when the tank is 90% full serves as a proactive measure. It provides a sufficient buffer to allow the operator to take corrective actions before the tank reaches full capacity. This proactive alert is essential because if the tank were to fill beyond 90%, the risk of an overfill incident increases significantly, leading to potential environmental hazards, safety risks, and regulatory violations.

Setting the alarm at this level ensures that adequate time is available for intervention, minimizing the risk of spillage and allowing operators to manage tank operations effectively. Having it trigger at lower levels, such as 75% or 80%, might not provide enough warning, while waiting until the tank reaches full capacity does not allow any opportunity for corrective actions to be taken. Thus, establishing the alarm at 90% is the most effective approach to prevent overfilling.