Rich,
The three wire sensors do this all the time.
The 4 wire sensors will not become damaged from a disconnected ignition ground.
C&H sells those and I highly recommend them.
ORIGINAL: RichyP
Hi Volksman,
My spark plug ground wire come loose from my Brison 2.4 during flight which caused a dead stick.
After I reattached the ground wire the engine would not start again.
Found that the sensor shorted out or something when the ground wire came loose.
Got a new sensor from C&H and engine runs fine now.
Rich