Industry Leader in providing

the best solutions for gas detection applications to the waste water and other industries.


Industry Leader in providing

the best solutions for gas detection applications to the
waste water and other industries.

What is Odalog®?

The OdaLog® family of instruments includes portable gas loggers primarily designed for the wastewater industry, manufactured by App-Tek International – the industry-proven gas detection specialist for harsh environments.

The OdaLog® loggers are primarily used at a location close to the source of Hydrogen Sulphide (H2S) emissions such as those found within sewerage pumping stations, receiving manholes and inside sewer collection lines.

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Our Products


The OdaLog® is designed to be corrosion-resistant, robust and able to log data for extended periods of time.
With intrinsically safe, wireless data logging, low range detection and multi-gas monitoring options, there is an Odalog® solution to meet any Hydrogen Sulphide monitoring needs.

Easy to use

Simple one button operation, easy to read display, faster data download.

100% Safety

L2 is certified intrinsically safe for use in hazardous environments.

Wireless transmission

RTx uses an in-built GSM modem to transmit data.

Data accessible to PC

OdaStat-G software used for retrieval and analysis of logged data.

Learn more about H2S

Hydrogen Sulphide (H2S)

Hydrogen sulphide is a colourless, flammable, extremely hazardous gas with a “rotten egg” smell. It occurs naturally in crude petroleum and natural gas, and can be produced by the breakdown of organic matter and human/ animal wastes (e.g., sewage). It is heavier than air and can collect in low-lying and enclosed, poorly ventilated areas such as basements, manholes, sewer lines and underground telephone/electrical vaults.

Detection by Smell

Can be smelled at low levels, but with continuous low level exposure or at higher concentrations you lose your ability to smell the gas even though it is still present.

At high concentrations – your ability to smell the gas can be lost instantly.

DO NOT depend on your sense of smell for indicating the continuing presence of this gas or for warning of hazardous concentrations.

Health Effects

– Health effects vary with how long, and at what level, you are exposed. Asthmatics may be at greater risk.

Low concentrations

 – irritation of eyes, nose, throat, or respiratory system; effects can be delayed.

Moderate concentrations

 – more severe eye and respiratory effects, headache, dizziness, nausea, coughing, vomiting and difficulty breathing.

High concentrations

 – shock, convulsions, unable to breathe, coma, death; effects can be extremely rapid (within a few breaths).

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