Unattended, In-Well Water Level Monitoring

The Telog WLS-31 level tracker is a simple, effective and economical system designed to measure water level using a data logger and pressure sensor. The Telog WLS-31 is valuable in level monitoring applications such as aquifer characterization, environmental remediation, well or tank level recording, combined sewer overflow and sanitary sewer overflow.

With a Telog WLS-31, everything you need for level monitoring -- recorder, sensor and cable comes in one simple and rugged package, pre-assembled and calibrated. The simplicity of the compact battery-powered recorder enables you to put it to work, unattended, inside a 2" well within minutes of unpacking.

The WLS-31 performs uninterrupted at a site, even as you collect data from its wrap-around memory. This paperless system records and stores data in its memory for later transfer to a computer to for data review and reporting. Recorded data may be gathered from the WLS-31 in the field by a portable PC operating Telogers for Windows software.

 

Telog WLS-31

Telog WLS-31

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Articles

Techniques for trending water pressure at non-critical system points


Specifications

Recorder
Model: Telog PR-31
Type: Single channel pressure recorder

Measurement
-- Resolution: 12 bits (0.025%)
-- Accuracy:      
     --- ± 0.075% of full scale at 23º C
     --- ± 75 ppm/º C
-- Temperature Range: -40ºC to +65º C

Recording
-- Sample rate: Programmable from 1/sec up to 8 hours
-- Data interval: Programmable from 1/sec up to 8 hours
-- Values saved: Selectable min, avg & max per interval
-- Memory: 128 Kbytes (~80,000 data values)

Interface    
-- Type: RS-232; 300 to 19.2 Kbaud
-- Connector: Circular 4 pin watertight

Battery    
-- Type: Single AA Lithium (Saft LS 14500 or equal)
-- Life: 7 years typical

Physical     
-- Temperature ranges: -40º C to +65º C
-- Environmental: Submersible to NEMA 6 (IP-67)
-- Enclosure: 316 Stainless steel
-- Pressure vent: 0.2 micron Gore-Tex filter
-- Size: 140 mm (5.5”) long x 45 mm (1.75”) diameter
-- Weight: 1 Kg (2.2 lbs)
          
Sensor
Model: Telog PT-10R
-- Type: Strain gauge pressure sensor
-- Range: Selectable 5, 10 and 15 PSI
-- Accuracy     
     --- Non-linearity: ±0.15% of span; BFSL
     --- Repeatability: ±0.03% of span; BFSL
     --- Hysteresis: ±0.03% of span; BFSL

Temperature Range: -20°C to 60°C

Temperature Effect: 0.02%/°C

Pressure Over Range
-- Proof pressure:
     --- 4 X full scale for 5 PSI range
     --- 2 X for higher ranges
-- Burst pressure:
     --- 10 X full scale for 5 PSI range
     --- 4 X for higher ranges

Physical     
-- Pressure connection: G 1/4 female
-- Sensor length: 5.4"
-- Sensor diameter (max): 0.69"
-- Sensor body material: 316 Stanless Steel
-- Cable: Vented polyurethane 0.315" diameter
-- Cable length: 25 feet (contact Telog for alternate cable lengths)
-- Cable weight: 41 g/m (0.027 lbs/ft)

Support Software
-- Telogers for Windows
-- Telogers for Windows Lite

Get the Telog WLS-31

Request a Quote