The difference is the screen holes are 1/8" on a 45° angle

including automatic on off setpoints

Locking handle required must be purcahsed separately

Length: 3-1/2" width: 2-1/4" Height: 1-5/8" Takes No

7 DC Output Fuse Yes AC Input Fuse ****10A Temp Sensor Comp Yes CE Approved Yes Ignition Protected Yes Internal Fan Yes Current Limited Yes Battery Isolation Yes Charger Indicators LED Full/Charging Indicator Yes Fault Indicator Yes Manual/Auto Switch Yes Field Repairable  Yes Warr

Whale - Automatic Float Switch, Part No. BE9003 - Volt 12/24 Sounder Module The difference is the screenAutomatic switch with electric field sensor technology. 30 second delay.