1.0 Introduction

This user guide explains the capability, operation, and maintenance of the AquaVent water level and temperature datalogger. Focus is on use with Solinst Levelogger Software (Solinst Protocol), with separate User Guides discussing use with SDI-12 and MODBUS protocols.

To begin using your AquaVent, we recommend you install Levelogger Software Version 4.3 (or higher). Please visit: www.solinst.com/downloads/ to download the current version or check for updates.


To use the AquaVent with Version 4.3.3 Levelogger Software, the AquaVent logger must be using Firmware Version 1.000 or higher. The Wellhead must use Firmware Version 1.000 or higher.


1.1 AquaVent Water Level Datalogger

The AquaVent is an accurate water level and temperature datalogger. It uses a gauged (vented) pressure transducer. The pressure sensor is open to the atmosphere via a vented cable to surface, therefore, provides water level measurements that are automatically compensated for barometric effects, as well as temperature.

The AquaVent logger contains a desiccant and hydrophobic filter where the Vented Cable connects. There is no need to replace the desiccant or filter, they are designed to provide protection from moisture over the lifetime of the instrument, while still allowing air to vent to the transducer.


solinst aquavent aquavent user guide aquavent water level datalogger vented water level dataloggers vented dataloggers modbus dataloggers sdi12 dataloggers modbus water level dataloggers sdi12 water level dataloggers vented pressure transducers vented cable dataloggers image

Figure 1-1 AquaVent Logger


AquaVent Logger Technical Specifications
Level Sensor: Piezoresistive Silicon with Hastelloy Sensor
Ranges: 5, 10, 20 m (15, 30, 65 ft.)
Accuracy: ± 0.05% FS
Normalization: Automatic Temperature Compensation
Temp. Comp. Range: 0ºC to 50ºC
Temperature Sensor: Platinum Resistance Temperature Detector (RTD)
Temp. Sensor Accuracy: ± 0.05ºC
Temp. Sensor Resolution: 0.003ºC
Battery Life: 8 Years - based on 1 reading/minute (user replaceable in Wellhead)
Clock Accuracy: ± 1 minute/year (-20ºC to 80ºC)
Operating Temperature: -20ºC to 80ºC
Maximum # Readings: 40,000 (up to 120,000 using data compression)
Memory: Built-in FRAM: Continuous or Slate mode
Communication Speed: 9600 bps Solinst USB, 1200 baud SDI-12, MODBUS RS-232/RS-485 (various speeds), data download speed: 57,600 bps
Size: 7/8" x 7" (22 mm x 178 mm)
Weight: 129 grams (4.5 oz.)
Wetted Materials: Delrin®, Viton®, 316L Stainless Steel
Sampling Modes (using Levelogger Software): Linear, Event & User-Selectable Schedule with Repeat Mode, Future Start, Future Stop, Real Time View
Measurement Rates: 0.125 second to 99 hours
Barometric Compensation: Automatic


AquaVent Models Full Scale Accuracy
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.)



The Model number refers to the depth of submergence below water level that the pressure sensor can withstand. i.e.: The AquaVent which is available in M5, M10, and M20 ranges has actual water level ranges of 5 m(16.40 ft), 10 m (32.80 ft), and 20 m (65.60 ft) respectively.