Maretron TAL-1.5NPT Ultrasonic Tank Sensor NPT Black Water Airlock

The TLM100 comes with a fitting for an SEA 5-bolt mount as standard. If you have a 1.5" NPT threaded fitting on your holding tank you will need an adapter to be able to install the TLM100. This airlock adapter both converts the standard SAE mount to an NPT mount and prevents fouling of the sensor by holding tank waste.