Data Loggers

What is a data logger?
A data logger is a device used just as it sounds—to store data collected from sensors. The advantage of a data logger is that it can operate independently of a computer, but allows for data download via Wi-Fi, USB, or direct connection using a laptop. WaterLOG data loggers are at the center of our reliable water monitoring solutions being used world wide. Our data logging and telemetry instruments provide reliable data collection and real-time data transmission in extremely harsh conditions. Integrate multiple sensors, including third party sensors, with our data logging and telemetry systems to provide a total monitoring solution for your sites. Our systems provide you with a 24/7 view of your data for increased data quality and early warning through alarming and alerting.


Choosing a data logger
Customers around the world as us the same question: what data logger is right for me? We get it—there are a lot of choices out there. When choosing a data logger, we have narrowed it down to six questions to ask yourself:


1. What do you want to measure?
2. How fast do you want to measure the parameter?
3. How much memory do you need for the site?
4. What level of accuracy is required?
5. How do you want to communicate with your logger?
6. Is the software user friendly?

To help you answer those questions, we asked our most experienced service technicians to share their top tips to select the best data logger for your application. See what they said by downloading our free PDF:  '6 Steps to Identify the Best Data Logger for Your Application' 

Browse the comparisson chart below to find the best data logger for your site application. Once you find the logger you like, click on its image below for specific product features, specifications, literature and more!

WaterLOG Storm 3

Storm 3 Data Logger

The Storm 3 data logger incorporates a balanced set of inputs for analog, digital I/O and SDI-12 smart sensors to allow communication through cellular modems and GOES satellite. You'll love how easy it is to configure...

WaterLOG H-522+ XL Series Data Logger

XL Series Data Loggers

The WaterLOG XL Series consists of some of our most popular data logger models—the H-522, H-522+, H-350XL and H-500XL. Specifically designed to collect reliable data under extreme environmental conditions, the XL data...

Compare WaterLOG Data Loggers

FeaturesH-350XLH-522+H-5000Storm 3
Built-in PT Yes
Built-in GOES Yes Yes
Ext GOES Support Yes Yes Yes Yes
Built-in Cell Yes
Ext Cell Support Yes Yes Yes Yes
Touch Screen Yes
WiFi Interface Yes
Web GUI Interface Yes
Keypad and Display Yes Yes
USB Device Storage Yes Yes Yes Yes
USB Host Support Yes Yes Yes Yes
SD Card Storage Yes Yes Yes
MODBUS Master Yes
MODBUS Slave Yes Yes Yes
Basic Programming Yes Yes Yes Yes
Non-Volatile Memory Yes Yes Yes Yes
Math Functions Yes Yes Yes Yes
Alarm Functions Yes Yes Yes Yes

RS-232 Ports 3 3 2 1
RS-485 Ports 0 0 0 1
Ethernet Port 0 0 1 0
Analog Inputs 4 4 4+ 4
Digital I/O 2 2 4+ 4
Frequency Input 1 1 1 0
SDI-12 Ports 1 1 2 1
4-20mA Output 1 1 1 0
Switched +12V Out 1 1 1 1

Sleep Current Draw 4 mA 10 mA 6 mA 3.5 mA
Active Current Draw 80 mA 85 mA 80 mA 50 mA
Internal Memory 256 MB 256 MB 256 MB 300 MB+