The Echometer Model M Digital Recorder is used in conjunction with an acoustic gas gun to determine the distance to the liquid level in the casing annulus or tubing of a well. Hamdon Energy Solutions sells three package configurations for this model:
- Model M Chart Recorder Package with Compact Gas Gun (Product No. EQ1500)
- Model M Chart Recorder Package with 5000 psi Gun (Product No. EQ1750)
- Model M Chart Recorder Package with 15000 psi Gun (Product No. EQ1800)