Solinst Levelogger 5 LTC Water Level & Conductivity Loggers

The Solinst Levelogger 5 LTC logs water level, temperature, and conductivity in a compact package with up to 8-year battery life and 3-year warranty.


  • Increased memory for logging up to 100,000 sets of data
  • Upgraded platinum RTD and conductivity sensor for better sensitivity
  • Double O-ring seals with 2x over pressurization rating
List Price $1,752.00

The Solinst Levelogger 5 LTC combines a datalogger, 8-year battery, Hastelloy pressure sensor, temperature detector, and conductivity sensor within a small waterproof housing, 22mm x 208mm (7/8" x 8.2"). A baked-on coating using polymerization technology protects the body against corrosion, abrasion and high temperatures. The conductivity sensor is a 4-electrode platinum sensor with autoranging capabilities. The minimal-maintenance, sealed Levelogger 5 LTC is simple to clean and calibrate, even in the field.

Level Sensor: Piezoresistive Silicon with Hastelloy Sensor
Ranges: 5, 10, 20, 30, 100, and 200 m
Accuracy: ±0.05% FS
Resolution: 0.001% FS to 0.0006% FS
Units of Measure: cm, m, ft, psi, kPa, bar (ºC, ºF)
Normalization: Automatic Temperature Compensation
Temp Comp. Range: 0ºC to 50ºC

Temperature Sensor: Platinum Resistance Temperature Detector (RTD)
Accuracy: ±0.05ºC
Resolution: 0.003ºC

Conductivity Sensor: 4-Electrode Platinum
Full Range: 0 – 100,000 µS/cm
Calibrated Range: 50 – 80,000 µS/cm
Accuracy: ±1%: 5,000 µS/cm – 80,000 µS/cm; greater of ±2% or 15 µS/cm: 50 µS/cm –5,000 µS/cm
Resolution: ±0.1 µS/cm
Temp Comp. Range: 0ºC – 50ºC
Normalization: Specific Conductance @ 25˚C

Battery Life: 8 Years (1 reading every 5 minutes)
Clock Accuracy (typical): ±1 minute/year (-20ºC to 80ºC)
Operating Temperature: -20ºC to 80ºC
Maximum Readings: 100,000 sets of readings
Memory: Slate or Continuous
Communication: Optical high-speed: 57,600 bps with USB
Size: 22 mm x 208 mm (7/8" x 8.2")
Weight: 197 grams (6.95 oz)
Corrosion Resistance: Baked-on coating using polymerization
Wetted Materials: Platinum, Delrin®, Viton®, 316L Stainless Steel, Hastelloy, Regulator approved PFAS-free PTFE
(inside and out)
Sampling Mode: Linear, Event & User-Selectable with Repeat Mode, Future Start, Future Stop, Real-Time View
Measurement Rates: 2 seconds to 99 hours
Barometric Compensation: Software Wizard and Barologger 5

Questions & Answers
Can the Levelogger be connected to an external data logger?
Yes, the Levelogger can be integrated with an external data logger via SDI-12 output through the use of a direct read cable and SDI-12 interface cable (PN# 115133). Please see the Accessories tab for pricing on these options.
Do Levelogger LTC loggers deployed in a well need to be pulled to the surface in order to collect data via PC?
No, a USB Interface Cable attaches to the topside connector of Leveloggers deployed with L5 Direct Read Cables, allowing for communication with a PC in the field.
Can I connect to a Levelogger LTC via Bluetooth connection?
Yes, a Solinst Levelogger App Interface (part 115009), allows Bluetooth connection of Leveloggers to Android and Apple devices.
Is the Levelogger LTC a vented pressure transducer?
No, the Solinst Levelogger LTC is an absolute logger, meaning that it is sealed from the atmosphere and records both barometric and water pressure data. Because of this, the data will need to be paired with local barometric pressure data to compensate for effects on the water level within the well. Solinst offers a vented logger, the LevelVent which can be found here:
Does the Levelogger LTC need to be calibrated for conductivity?
Yes. Solinst recommends that a conductivity calibration is performed using the Conductivity Calibration Wizard and should be done, at minimum, 2 times a year especially before initial use of the LTC Levelogger and after long periods of dry storage.
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