[Highly reliable level sensor]
The sensor is protected by the resin cover.
Stable performance is not affected by the drain quality.

[Electronic circuit with self-diagnosis function] (excluding DB3003)
The electronic circuit with self-diagnosis function constantly monitors the discharge status displaying it with LEDs.

[Arbitrary discharge of drainage]
Drain can be discharged as desired by pressing the TEST button during operation check, etc.

[Self-avoidance operation simultaneous with alarm mode output] (excluding DB3003)
If drain discharge does not work normally, an alarm signal is output and self-recovery operation is repeated until the problem of the valve is removed.

[Easy wiring] (excluding DB3003)
The power supply and control sections are compactly stored.
The power supply section can be detached, allowing you to connect the pipes easily.