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Solinst Levelogger Junior

For important projects with a tight budget, Levelogger Junior provides a low cost solution for continuous water level and temperature measurement. Simple to deploy and program with Levelogger Gold accessories and easy-to-use software. Accuracy is 0.1% FS with lifetime calibration, battery lasts 5 years, and memory holds 32,000 sets of readings. Levelogger Junior is SDI-12 compatible, as is the higher accuracy Levelogger Gold.

Model 3001 Levelogger Junior

The Levelogger Junior provides an inexpensive alternative for measuring groundwater and surface water levels. It combines a datalogger, temperature sensor, pressure transducer, and 5-year battery, in a small, maintenance free, waterproof stainless steel housing.

The Levelogger Junior features a non-volatile memory, with a capacity of 32,000 sets of temperature and water level data points. Readings are linear at a user-defined interval between 0.5 second to 99 hours. Accuracy is 0.1% FS, with a lifetime factory calibration.

If greater accuracy, sampling options, or ranges are required, the Solinst Levelogger Gold has the functionality to suit your application. (See Model 3001 Data Sheet.) For conductivity datalogging, Solinst also offers the LTC Levelogger Junior (See Model 3001 LTC Levelogger Junior Data Sheet).

Compatible with Levelogger Gold software and accessories, the Levelogger Junior is also SDI-12 compatible, can communicate using a Leveloader Gold data transfer unit, and is able to integrate into Solinst Telemetry Systems.


Programming the Levelogger Junior is the same as with the Levelogger Gold. An Optical Reader or PC Interface Cable connects the Levelogger to a laptop or desktop PC. The intuitive Levelogger Gold Software automatically detects the type of Levelogger that is connected. Programming, downloading, data management and export are easy. The Real Time View option allows immediate viewing of live water level and temperature readings. These compact dataloggers are very easy to deploy. Installation can be with direct read cables or by stainless steel wireline or Kevlar® cord suspension, avoiding the use of vented cables. (See Model 3001 Data Sheet.)

The Levelogger Junior outputs temperature and compensated water level readings. The Barologger Gold and Levelogger software allow easy barometric compensation.

The Levelogger Junior also features helpful utilities such as self-test capability, a robust, non-volatile EEPROM memory and FRAM back-up memory for increased data integrity, also the ability to upgrade firmware for increased function and features.


* Low cost alternative in the Levelogger Series
* Accuracy of 0.1% FS
* 32,000 datapoints
* 5 year battery
* 1 year warranty
* Compatible with Levelogger Gold Series, software accessories and Telemetry


Level Sensor: Piezoresistive Silicon in 316L SS
Ranges: F15/M5, F30/M10
Accuracy (typical): 0.1% FS
Resolution: M5/F15 - 0.028%, F30/M10 - 0.021%
Normalization: Automatic Temp Compensation
Temperature Sensor: Platinum RTD
Accuracy: ± 0.1°C
Resolution: 0.1°C
Temp Compensation Range: - 10°C to 40°C
Battery life: 5 Years
Clock Accuracy: ± 1 minute/year
Operating Temperature: - 20°C to 80°C
Memory: Non-volatile EEPROM, FRAM back-up
Maximum # Readings: 32,000 sets of readings
Communication: Optical Infra-Red to USB or RS232
Size: 7/8” x 5.5” (22 mm x 140 mm)
Weight: 154 g (5.4 oz)
Wetted Materials: 316L Stainless Steel, Delrin®, Viton®, Buna-N
Sampling Mode: Linear, SDI-12, Real Time View (from 0.5 sec to 99 hrs)
Barometric Compensation: Software Wizard and Barologger Gold


* Pump and slug tests
* Reservoir and stormwater runoff management
* Watershed and drainage basin monitoring
* Stream gauging, lake and wetland monitoring
* Tank level measurement
* Monitoring water levels in wells and surface water

Ordering Information

SOL 110241   3001 LT Levelogger Junior Edge M5/F15

SOL 110242   3001 LT Levelogger Junior Edge M10/F30