Monitor Datalogger - DL-2

Ozone Solutions

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California Regulatory Information

SKU: 007819

Product Overview

Ozone Solutions

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. 


  • 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
 More Information
 Weight 2.2500
 Dimensions 0.9 x 2.3 x 2.9 inches (2.2 x 5.8 x 7.4 cm)
 Warranty 1 Year
 Accuracy +/- 2 mV, +/- 2.5% of absolute reading
 Has Battery Yes 1-year life - user replaceable (CR-2032 lithium)
 Operating Temperature -4 to 158°F (-20 to 70°C)
 Input Voltage Range 0 - 2.5 VAC
 Activity Indicator Yes Blinking LED confirms operation
 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
 Memory Type EEPROM memory retains data after battery has been removed
 Signal Resolutions 16-bit
 Analog Inputs 0-2.5 V

How It Works

  • 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


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).

How long does the internal battery last?



Warranty Information

Seller warrants that all Products will conform to the Specifications and will be free from defects in material workmanship and programming. Claims for Products not complying with this warranty shall be submitted by Buyer no later than 12 months from delivery date to Buyer. Seller shall promptly repair or replace, at its option and expense, non-complying Products. The shipment of non-complying Products by Buyer to Seller, and the return shipment of repaired or replacement Products by Seller to Buyer shall be at Seller's expense, unless it shall be determined that Buyer returned a Product that was in compliance, in which case such cost shall be borne by Buyer and, if paid by Seller, these expenses shall be reimbursed by Buyer within thirty (30) days of notice by Seller. Buyer shall receive a credit for any non-complying Products returned for repair or replacement. All non-complying Products shall be returned to Seller (at its offices or as otherwise instructed) no later than 30 days as of the date the non-compliance of any such Product has been discovered. Seller is NOT responsible for any/all damages suffered to the Products that is caused by the Buyer. Such as but not limited to damage by wrong electrical current, damage through crush or dropping the product, damage through untrained users of Product, damage through improper operations.

California Regulatory Warning

Example Image
Use in unoccupied spaces only.
Health hazard warning: emits ozone.

This product is not CARB Certified (Ozone Emissions for Air Cleaners).
Product Disclaimer: Does not meet California air cleaner regulation requirements; cannot be shipped to California.