Made by Balboa
Codes for sensors: 30344
Says "sensor assy 12" (1/4) m7 on the sensor label
Sold separately - It is always advised to purchase these sensors as a matching pair.
Hot Tub and Spa Sensor. This is a Balboa hot tub sensor fits any M7 system.
Comes with 06.cm o'ring, metal washer,
Install using a little Vaseline on sensor to slide into position
Try not to over tighten nut (should be finger tight) and do not switch on hot tub if water has got onto the PCB (wait for this to dry properly before switching on the hot tub).
Balboa hot tub sensors are used to repair SNS, SNA or B errors, if the problem persists you will probably need a new PCB.