WEMA  Waste Tank Level Sender 

• These Waste Tank Level senders are for use with Waste Water level gauges of the matching specs of 240- 33 ohms
• Simply match the depth of sender with the internal depth of your tank
• 1 1/4" BSP Male Screw in
• Magnetic Reed Switch
• 316 S/Steel shaft
• Includes O-rings

This popular device is available in various lengths to suit any tank