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I would like to commend Ozone Solutions for their quality workmanship and superior customer service. Ozone Solutions provided us with a well-designed ozone sparge system with plenty of room inside to move around and perform the operation and maintenance on the ozone system. You were extremely helpful during the engineering, planning, and building process...

Phone: (712) 439-6880
Hours: 8 AM - 5 PM Central Time

DL-2: Ozone Datalogger

Easy to use datalogger


  • Stores tens of thousands of data points
  • Easy-to-use software
  • Push-button, or sheduled, start
  • Includes software, USB interface cable and software manual
  • Compatible with any ozone monitor

(See Full Specifications)

DL-2 $385.00
Stock: In Stock
Choose your Datalogger Kit:


The DL-2 Datalogger easily stores up to 43,000 datapoints! Data is instantly & quickly transferred to the computer with included USB Cable & Windows XP compatible software.


Dimensions 0.9 x 2.3 x 2.9 inches (2.2 x 5.8 x 7.4 cm)
Weight 2.25 lbs (1.02 kg)
= 10 N
= 2.248089 lb
= 1.019716 kg
= 1,019.716213 g
= 1,019,716.212978 mg
= 35.969431 oz
Accuracy +/- 2 mV, +/- 2.5% of absolute reading
Activity Indicator yes Blinking LED confirms operation
Analog Inputs 0-2.5 V
Has Battery yes 1-year life - user replaceable (CR-2032 lithium)
Input Voltage Range 0 - 2.5 VAC
Memory Type EEPROM memory retains data after battery has been removed
Operating Temperature -4 to 158°F (-20 to 70°C)
Signal Resolutions 16-bit
Software Instantly plot data(min, max, avg) with HOBOware Lite software for Windows, or Mac - Export points as a text file (.csv or .txt) into Excel, Lotus, Etc.
Storage Space 64 KB 43,000 data points
= 65,536 bytes
= 64 KB
= 0.0625 MB
= 0.000061 GB
Warranty 1 Years


Documents / Downloads

Frequently Asked Questions

  1. On the OS-4, why is my Analog Output reading 1/2 of the Display reading? (For example, the OS-4 analog output seems to indicate 0.2 ppm when the OS-4 display reads 0.4 ppm)

    This discrepancy is due to the Scaling of the Analog Output (and applies to both the 4-20 mA and 0-2V outputs). The OS-4 utilizes an SM-X sensor. This chip, on its own, is designed to read up to 20 ppm. Therefore the output of the chip scales from 0-20 ppm, even though the OS-4 is rated for just 0-10 ppm. If your analog readings are 1/2 of what is diaplayed, it is likely because you scaled your analog output from 0-10 ppm instead of 0-20 ppm. As an example, if your OS-4 is reading 10 ppm you may expect to see 2V on the analog output (full scale). Instead, you will see 1V (1/2 scale). This is because the analog output scales to the full 20 ppm range of the SM-X sensor chip, meaning that a 1V reading corresponds to 10 ppm. The correction is to scale your analog output from 0-20 ppm (4-20 mA output or 0-2V output).

  2. How long does the internal battery last?


How It Works

DL-2 Software

- View multiple parameters from one or more loggers on one graph
- Combine data from multiple deployments on one graph
- Copy-and-paste data from one plot onto another
- Zoom and axis-control tools to focus on data of interest
- Optional display of recorded events such as button push/release, host computer connection, and/or low battery in graphs or file exports

Last Updated: March 18, 2015

The above information is from and is copyrighted by Ozone Solutions Inc.
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8 AM - 5 PM Central Time
Phone: (712) 439-6880
Toll Free: (888) 892-0303 (USA Only)
Fax: (712) 439-6733