Fire hydrant instrument, display system and power management circuit

The utility model relates to a fire hydrant instrument, display system and power management circuit belongs to instrument technical field. The fire hydrant instrument includes the power management circuit in casing, workload and inherent this casing, and power management circuit includes battery connecting terminal, non -contact trigger device and control circuit, and non -contact trigger device exports triggering signal to control circuit, and control circuit is according to triggering signal control workload work connecting terminal 2. Through triggering non -contact trigger device control workload work predetermined duration, safety in utilization that not only can effectual this fire hydrant of improvement still can reduce its consumption, but wide application in fields such as fire control. 本实用新型涉及种消防栓仪表、显示系统及电源管理电路，属于仪表技术领域。消防栓仪表包括壳体、工作负载及内在该壳体内的电源管理电路，电源管理电路包括电池连接端子、非接触式触发装置及控制电路，非接触式触发装置向控制电路输出触发信号，控制电路依据触发信号控制工作负载工作预定时长。通过触发非接触式触发装置控制工作负载工作预定时长，不仅可有效的提高该消防栓的使用安全性，还可降低其功耗，可广泛应用于消防等领域。