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TLM150 User’s Manual
Page 2 Revision 1.2
1.5 TLM150 Accessories
Maretron offers the following accessories for the TLM150:
• TA-5H-1.5NPT 1.5” NPT Displacement Hull Tank Adapter
• TA-5H-1.25BSP 1.25” BSP Displacement Hull Tank Adapter
• TFT-5H SAE 5-Bolt Pattern Non-Displacement Hull Focus Tube
• TFT-1.5NPT 1.5” NPT Non-Displacement Hull Focus Tube
• TFT-1.25BSP 1.25” BSP Non-Displacement Hull Focus Tube
1.6 Quick Install
Installing the Maretron TLM150 involves the following steps. Please refer to the individual
sections for additional details.
1. Unpack the Box (Section 2.1)
2. Choose a Mounting Location (Section 0)
3. Mount the TLM150 (Section 2.4)
4. Connect the TLM150 (Section 2.5)
5. Configure or Program the Tank Number (Section 3.1)
6. Configure or Program Tank Capacity (Section 3.2)
7. Configure for Tank Depth and Shape
o Configure or Program the Tank Depth (Section 3.3.1)
o Custom Calibration (Section 3.3.2)
2 Installation
2.1 Unpacking the Box
When unpacking the box containing the Maretron TLM150, you should find the following items:
• 1 – TLM150 Tank Level Monitor
• 1 – TLM150 Gasket
• 1 – TLM150 User’s Manual
• 1 – Warranty Registration Card
If any of these items are missing or damaged, please contact Maretron.
2.2 Theory of Operation
The TLM150 operates by directing a pulse of ultrasonic sound from the sensor component at
the top of the tank down to the surface of the liquid in the tank. The TLM150 then measures
the time it takes this pulse to travel down to the surface of the liquid, be reflected back up, and
then be received back at the sensor component. Using the speed of sound, it uses this time to
calculate the distance between the face of the sensor component and the surface of the liquid
(or the tank bottom if the tank is empty). The cone width of the beam transmitted by the