本质安全（Intrinsic safety）是一种使电子设备在爆炸性气体环境及不正常操作条件下可以安全运作的保护技术，设计方式是避免设备释放足以引燃易燃物的能量。本质安全概念的发展是为了在危险区域下，（例如北海的天然气平台）进程控制仪表的安全运作。

降低爆炸风险可以由三个方式来进行：限制爆炸范围、隔离及预防，本质安全是预防方面相当有效的方式。本质安全是固有安全在仪器上的应用。以往认为像马达或照明等高功率电路不适用本质安全的保护方式，不过配合动态电弧识别终端（简称DART）的技术，高功率电路也可以适用本质安全的保护方式。

Not to be confused with inherent safety, the more general industrial technique of minimizing the danger of a process.

Intrinsic safety (IS) is a protection technique for safe operation of electrical equipment in hazardous areas by limiting the energy, electrical and thermal, available for ignition. In signal and control circuits that can operate with low currents and voltages, the intrinsic safety approach simplifies circuits and reduces installation cost over other protection methods. Areas with dangerous concentrations of flammable gases or dust are found in applications such as petrochemical refineries and mines. As a discipline, it is an application of inherent safety in instrumentation. High-power circuits such as electric motors or lighting cannot use intrinsic safety methods for protection.