Solinst

104 Sonic Water Level Meter

Portable acoustic ranging instrument that measures depth to static water level without putting any equipment down the well.

Measures down to 600 m (2000 ft), with a reading within seconds
Automatically temperature compensated, with settings for drop tube diameter, offsets and measurement range
Works in straight or crooked pipes and wells with difficult access

Quantity

Overview

The Solinst Model 104 Sonic Water Level Meter is a portable, acoustic ranging instrument designed to simply and quickly measure depth to static water level in a well, piezometer, sounding tube or any closed pipe. It consists of a Control Unit and a connected Probe that sits in the vent opening of a standard well cap. The Probe transmits a sound wave into the well and measures the time it takes for the pulse to return after contacting the water, with a temperature sensor in the Probe adjusting for variations in the speed of sound. Because no instruments go down the well, no chemicals are introduced and no equipment needs to be decontaminated.

Typical applications

Depth to static water level in wells, piezometers, sounding tubes and closed pipes
Wells and boreholes that are difficult to access due to crooked pipes, narrow tubes, instrumentation or other obstructions
Wells where the annulus between the casing and a pump is too small for other water level meters
Contaminated or corrosive sites, such as landfills, waste management and hazardous waste sites, mine tailings, oil and gas extraction, remediation and Brownfield sites, and leaking underground storage tanks
Quick depth to water checks to decide where to place other instrumentation

Key Features

Measures down to 600 m (2000 ft); water level displayed in Metric or English units
Control Unit with clear LCD display and keypad, connected to the Probe with a 1.8 m (6 ft) cable
Water level readings are automatically temperature compensated
Adjustable minimum and maximum measurement range to ignore interference from known well features
Settings for well and drop tube diameters, measuring point offset and water temperature
Power Save mode to prolong battery life
Readings are not affected by cascading water
Supplied with a plastic disc to cover larger well openings and a Solinst Field Bag

Benefits

Fast Readings: Get a depth to water reading within seconds of turning the meter on.
Nothing Down the Well: No chemicals introduced and no equipment to decontaminate.
Difficult Access: Works in any closed pipe, straight or angled, and in wells with very narrow or difficult access to the water level.
Simple to Use: Handheld, portable unit with an easy keypad and LCD display.

Specifications

MEASUREMENT
Measuring principle	Acoustic ranging: sound pulse travel time, temperature compensated
Operating range	3 to 600 m (9 to 2000 ft)
Accuracy	3 cm (0.1 ft)
Resolution	1 cm (0.05 ft)
Water level reading update time	~1 sec @ 150 m (500 ft) ~4 sec @ 600 m (2000 ft)
Units of measurement	Metric or English options

CONTROL UNIT
Dimensions	19 x 9 x 4 cm (7.5 x 3.5 x 1.5")
Weight	390 g (14 oz)
Display	LCD with keypad
Power	6 AA replaceable alkaline batteries
Battery life	Up to 500 hours of use Up to 21 days in power save mode
Auto off	After 15 minutes (Normal mode) or 3 minutes (Power save mode)

PROBE
Dimensions	16 x 8 x 7 cm (6 x 3 x 3")
Probe diameter	1.7 cm (5/8")
Cable length	1.8 m (6 ft)
Contains	Sound/pulse generator, microphone and temperature sensor

ENVIRONMENTAL
Operating temperature	-20 to 45 °C (-10 to 110 °F)
Water resistance	Resistant to rain or splashing; Control Unit and Probe cannot be submerged

INSTALLATION
Mounting	Probe sits in the vent opening of a standard well cap or a Solinst 2" Locking Well Cap
Larger openings	Supplied plastic disc covers the well opening
Wells over 8" diameter	Use a drop tube from the top of the well to just below the water level
Drop tube settings	>5 cm, 5, 4.4, 3.8, 3.2, 2.5, 1.9 and 1.3 cm (>2", 2", 1.75", 1.5", 1.25", 1", 0.75", 0.50")
Recommended max depth per drop tube	1.3 cm to 120 m; 1.9 cm to 180 m; 2.5 cm to 300 m; 5 cm to 600 m

SUPPLIED WITH
Included	Control Unit, Probe, 6 AA batteries, plastic disc for larger well openings, Solinst Field Bag

Drawing

Downloads

104 Sonic Water Level Meter Datasheet (EN)	Download104 Sonic Water Level Meter Datasheet (EN)
104 Sonic Water Level Meter User Manual (EN)	Download104 Sonic Water Level Meter User Manual (EN)