New SPDT sensor (capable of turning ON or OFF) has been implemented in our HM/54-03.01 gauge oil level indicators.
Providing the sensor with contacts normally open and closed in a single case (SPDT) is an answer to a market demand. Therefore while using normally closed contacts (NC) wire damage and/or plug disconnection is also signalized with change of state.
New construction of the level gauge with second sensor enables also sending signals on both: warning and alarm oil levels. Warning signal may be used to inform staff about abnormal condition and the alarm signal is supposed to cause action ie. turn the power equipment off.
SPDT - single pole double throw; form C sensor: normally open (NO) and normally closed (NC) contacts