OdaLog L2 H2S Data Logger – SL

• Designed for harsh wastewater environments with proven, robust double o-ring design
• Up to 12-month battery life
• Internal memory for up to 42,000 data points
• Easy to read large alphanumeric display
• Fast downloading with IrDA or BlueTooth Wireless communications link
• Certified intrinsically safe to use in most hazardous environments
Other gas types and ranges possible. Call us for more information




The OdaLog L2 H2S Data Logger has been specifically designed to withstand harsh environments typically found in the Wastewater Industry. The OdaLog is primarily used by locating it at or close to the source of Hydrogen Sulfide emissions such as within sewerage pumping stations and receiving manholes. Its purpose is to monitor gas levels to help control H2S gas in sewerage systems and treatment plants for later review and evaluation using OdaStat-G software.

OdaLog L2 H2S Data Logger Features:

  • Instrument Operating Range: -20°C (-4°F) to 50°C (122°F)
  • Sensor Operating Range: -10°C to +40°C (14°F to 104°F)
  • IP66/68 Ingress Protection
  • Dimensions: 2.44” Diameter x 7.72” Tall
  • Weight: 14.8 oz
  • Power Supply: Replaceable C-Size Lithium Battery
  • Battery Life/Run Time: Greater than 8 months
  • Data Logging Capacity: Up to 42,000 readings
  • Sample Interval: Selectable from 1 second to 1 hour

Four different detection ranges are available:

0-50 PPM

0-200 PPM

0-1000 PPM

0-2000 PPM

Typical Applications:

• Gas monitoring in manholes, drains, and pits
• Odor monitoring in sewer and streaming water
• Ventilation pipes and rising mains
• Inside sewer collection lines
• Selected areas in treatment plants
• Asset management and odor control

The L2 H2S Data Logger is also available with a Long Term sensor, which allows for longer deployment times (up to thirty days at a time) plus models for other gases including ammonia, chlorine, sulfur dioxide, NO, NO2, carbon monoxide, and hydrogen cyanide.

You can learn more about the dangers behind exposure to Hydrogen Sulfide gas here.


Instrument Temp Range -20°C (-4°F) to 50°C (122°F)
Sensor Temp Range -10°C to +40°C (14°F to 104°F)
Instrument Relative Humidity Range  15-90% non-condensing
Ingress Protection IP66/68
External Dimensions Diameter 62mm (2.44”) x Height 196mm (7.72”)
Instrument Weight 420 grams / 14.8 oz
Power Supply Replaceable C-Size Lithium Battery (approved battery type/brand/make only)
Battery Life/Run Time Greater than 8 months (for life of lithium battery)
Data Logging Capacity Up to 42,000 readings in total
Interval Selectable from 1 second to 1 hour
Data Logging Duration Example Capacity > Logging interval of 1min = 29 days
Capacity > Logging interval of 5min = 6+ months

Available Models/Ranges

Model Gas Range Resolution Accuracy (Full Scale) Accuracy (@ 20ppm gas, STP)
ODASL-H2S-2000 H2S Hydrogen Sulfide 0-2000ppm 1 ppm 2% Full Scale ± 2ppm
ODASL-H2S-1000 H2S Hydrogen Sulfide 0-1000ppm 1 ppm 1% Full Scale
ODASL-H2S-200 H2S Hydrogen Sulfide 0-200ppm 0.1 ppm 1% Full Scale
ODASL-H2S-50 H2S Hydrogen Sulfide 0-50ppm 0.1 ppm 4% Full Scale
Note: STP = Standard Temperature & Pressure: 20˚C (68˚F) @ absolute pressure 101.3 kPa (14.7 psi)


OdaLog™ Loggers need to be used in conjunction with the proprietary software OdaStat-G for retrieval and analysis of all your logged data.

Servicing & Warranty

We recommend that the OdaLog™ loggers are returned to an authorized OdaLog™ service center at least once every six months for a full inspection, calibration, and linearity testing.

The OdaLog™ loggers have a 12-month warranty when used in accordance with the operator’s manual (excluding calibration and freight costs).


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