Levelogger Edge Field Measurement

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Levelogger Edge Ranges

Each model of Levelogger is rated for a specific submergence depth (Table 1). The choice of model largely depends on the accuracy of the water level required and the submergence depth. The selection, however, should be based on the maximum anticipated water level fluctuation.

 

Model Submergence Depth Accuracy
Barologger Air only ± 0.05 kPa
M5 5 m (16.4 ft.) ± 0.3 cm (0.010 ft.)
M10 10 m (32.8 ft.) ± 0.5 cm (0.016 ft.)
M20 20 m (65.6 ft.) ± 1 cm (0.032 ft.)
M30 30 m (98.4 ft.) ± 1.5 cm (0.064 ft.)
M100 100 m (328.1 ft.) ± 5 cm (0.164 ft.)
M200 200 m (656.2 ft.) ± 10 cm (0.328 ft.)

Table 1 - Levelogger Edge Range

 

Note:

The Levelogger Edge can withstand overpressurization of 2 times the intended range, e.g. a Model M10 can accommodate a fluctuation of 20 meters or 60 feet and still record pressure. However, over-range accuracy is not guaranteed.

 

Barologger Edge:

Solinst Barologger EdgeA single Barologger can be used to compensate all Leveloggers on site, within a 20 mile / 30 km radius and with every 1000 ft (300 m) change in elevation. Ensure that your Barologger will start logging within at least 3 hours of your Levelogger start time.

 

Measurement Fundamentals

Leveloggers (L) measure the total pressure acting on a transducer at their zero point/sensor. The total pressure is caused by the column of water lying above the Levelogger pressure sensor AND the barometric (atmospheric) pressure acting on the water surface. To compensate for barometric pressure fluctuations and get true height of water column measurements (H), a Barologger (B) is required, i.e.:


Levelogger Reading (L)
-
Barologger Reading (B)
=
Height of Water Column (H)

 

Verifying Readings

The best recommendation is to compare barometrically compensated Levelogger data (H) with a measured depth to water level value (d) (using a Water Level Meter). The deployment depth of the Levelogger (D), minus the manual depth to water measurement (d), should equal the compensated Levelogger reading, i.e.:


D Deployment Depth (D)
-
Depth to Water (d)
=
Height of Water Column (H)

 

Tip:

To adjust all readings in your Levelogger file to depth to water below a well casing (d), record a manual water level measurement using a water level meter. This reading should correspond in date and time with an actual Levelogger recording. Use this as a reference datum in the Manual Data Adjustment option in the Levelogger Software Data Wizard.