Echometer Model M

A portable acoustic measurement device for determining liquid levels in a well's casing annulus, using a dual-channel amplifier/recorder and a gun/microphone wellhead attachment. Generates acoustic pulses via a gas gun that travel down the wellbore and reflect off tubing collars and liquid surfaces; a microphone captures reflections, converting them to electrical signals processed and recorded on paper strip chart. Liquid depth is calculated by counting collar reflections (× average tubing joint length) or via acoustic velocity with labeled timing marks.

Key Features / Specs

• Dual-channel recorder
• Automatic gain setting and control
• One-second timer with date stamp
• Built-in self-test; software included
• Operates from self-contained 12V rechargeable lead-cell battery or 12V external outlet.

Included components:

• Compact plastic case
• 5 ft microphone-to-amplifier cable
• 110/220 VAC automatic battery charger
• 12VDC cigarette lighter power cord
• 11-point dividers, 10 rolls of paper
• 200 PSI gauge with quick connector
• O-rings and misc. parts
• 5 lb CO2/N2 cylinder (customizable)
• Hose and filler connector for gas cylinders.