Scentroid OdoTracker is a multi-sensor device that measures the concentrations of two chemicals in ambient air at the same time. The chemicals to be measured by the device are specified at the time of ordering. For example the user may specify the measurement of Hydrogen Sulphide (H2S) in ppb level and Ammonia (NH3) in ppm level. The instrument logs the chemical measurements as well as temperature and humidity of the sample, GPS location and automatically transfers all data to the user’s supplied smart Android device via Bluetooth.

Detection Threshold

The Odotracker can measure chemicals such as H2S close to detection threshold at ppb level.

Automated data logging

Odotracker provides automated continuous chemical, GPS position, Temperature, and Humidity data logging.

Sample bag or ambient testing

Odotracker can measure chemical composition of ambient air or sample stored in a PTFE, Tedlar or Nalophan bags.

Odotracker TR8 Applications

Odotracker Applications

  • Measure ambient H2S, Ammonia, Total VOC, and other chemical concentrations
  • Determine H2S, Ammonia, VOCs, and other chemicals emissions from various types of sources
  • Determine emission trends through 24+ hour data logging
  • Verify sample loss due to transportation 
  • Validate dispersion models through emission measurements 

Odotracker TR8 Basics of Operation

Odotracker Basics of Operation

  • Connect to OdoTracker via Bluetooth
  • Connect the sample bag or allow for ambient air to be pulled in
  • See chemical readings live
  • Take snapshot readings of H2S, Ammonia, VOC, another chemical compositions, GPS position, Temperature, and humidity of the sample
  • Activate recording for continuous data logging
  • Export data for reporting and post analysis

Odotracker TR8 Capabilities

Odotracker Capabilities

The Scentroid Odotracker includes a sampling pump , two chemical sensors that are specified at the time of ordering, and Scentroid’s OdoTracker Application that can be loaded to any customer supplied Android phone/tablet. For each sample location, Scentroid instantaneously records:

  • The concentration of two chemical vapours in ppm or ppb depending on sensors ordered (See table below for sensor ID’s detail that can be selected in any combination of two at time of ordering. Note that DR8-P1 and DR8-P2 Total VOCs – PID sensors can be specified at a nominal additional charge at the time of ordering )
  • Measure Temperature and Humidity
  • Record GPS position of each measurement
  • Measure directly from ambient air
  • Can record continuously for remote monitoring via

Odotracker Technical Specification

Manufacturer Scentroid
Model Odotracker
Measurement range Range depends on sensors selected as shown below.
Initiation time 2 min
Settling time 0.5 seconds
Pressure range 80 -120 kPa
Additional parameters measured Temperature, Relative Humidity, GPS position
Battery Life 24 hours
Temperature range -30 to 50 degrees C
Weight 745g
Humidity range 15-90 % rh

Available Sensors

Odotracker can be equipped with any 2 of following sensors
Sensor ID Formula Chemical Maximum Detection Limit Lowest Detection Threshold Resolution (ppm)
CD1 CO2 Carbon Dioxide – High Concentration 5% 20 ppm 100
CD2 CO2 Carbon Dioxide – Low Concentration 2000 ppm 0 ppm 0.6 ppm
CM1 CO Carbon Monoxide (low Concentration) 1000 ppm 0 ppm 0.1 ppm
CM2 CO Carbon Monoxide (high concentration) 10000 ppm 30 ppm 3 ppm
CL1 Cl2 Chlorine 20 ppm 200 ppb 0.1 ppm
H1 H2 Hydrogen 10000 ppm 100 ppm 10 ppm
HCL1 HCl Hydrogen Chloride 20 ppm 0.5 ppm 0.2 ppm
HCY1 HCN Hydrogen Cyanide 50 ppm 0.1 ppm 0.5 ppm
PH1 PH3 Phosphine (low Concentration) 5 ppm 50 ppb 30 ppb
PH2 PH3 Phosphine (high Concentration) 2000 ppm 5 ppm 2 ppm
HS1 H2S Hydrogen Sulfide (low Concentration – ppb) 3 ppm 7 ppb 1 ppb
HS2 H2S Hydrogen Sulfide (high Concentration – ppm) 2000 ppm 15 ppm 2 ppm
HS3 H2S Hydrogen Sulfide (medium Concentration – ppm) 200 ppm 2 ppm 0.2 ppm
E2 C2H6O, H2,
Organic solvents (Ethanol, Iso-Butane, H2) 500 ppm 25 ppm 1 ppm
MT1 CH4 Methane (LEL) 100 % LEL (50,000 ppm) 500 ppm 50 ppm
NC1 NO Nitric Oxide (low Concentration) 25 ppm 0.2 ppm 0.05 ppm
NC2 NO Nitric Oxide (High Concentration) 5000 ppm 2 ppm 3 ppm
ND1 NO2 Nitrogen Dioxide (Low Concentration) 20 ppm 0.03 ppm 0.1 ppm
ND2 NO2 Nitrogen Dioxide (high Concentration) 1000 ppm 2 ppm 1 ppm
NS1 N2O Nitrous Oxide 1% volume 100 ppm 1 ppm
O2 O2 Oxygen (high Concentration) 25% 5000 ppm 200 ppm
PD1 VOCs Total VOCs (ppb) – PID 50 ppm ( isobutylene ) 10 ppb 10 ppb
PD2 VOCs Total VOCs (ppm) – PID 300 ppm ( isobutylene ) 1 ppm 50 ppb
SD1 SO2 Sulfur Dioxide (high Concentration) 2000 ppm 2 ppm 1 ppm
SD2 SO2 Sulfur Dioxide (low Concentration) 20 ppm 0.3 ppm 0.2 ppm
SD3 SO2 Sulfur Dioxide (medium Concentration) 100 ppm 0.4 ppm 0.2 ppm
FM1 CH2O Formaldehyde 5 ppm 10 ppb 10 ppb
PM 1-10 PM Particulate PM 1, 2.5, 10 (simultanous) 2000 µg/m3 1 µg/m3 1 µg/m3
TS1 TSP PM 100 2000 µg/m3 1 µg/m3 1 µg/m3
NMH NMHC Non-methane Hydrocarbon 25 ppm 0.1 ppm 0.1 ppm
MS2 TRS TRS and Amines 10 ppm 1 ppm 2 ppb
MS3 NH3, C2H6O,


Air Contaminants (Ammonia, Ethanol, Toulene) 30 ppm 1 ppm 4 ppb
AM2 NH3 Ammonia (High concentration) 100 ppm 3 ppm 1 ppm
AM1 NH3 Ammonia (Low Concentration) 25 ppm 0.5 ppm 0.1 ppm
Oz1 O3 Ozone 5 ppm 20 ppb 20 ppb
RD1 α-, β-, γ, X Radiation Monitor ( α-, β-, γ- and x- radiation ) 1000 μSv / h 0.01 μSv / h 0.01 μSv / h

Complete Odour Assessment

Complete Odour Assessment

OdoTracker can be used to record chemical vapours, along with the intelligent personal olfactometer SM100i to do odour concentration measurements, providing simultaneous measurements on one Android device.

Increased Safety / Measuring Odour Losses

Increased Safety

Odotracker will provide the user with a constant reading of the ambient air providing an added protection from over exposure to chemical vapours such as hydrogen sulphide..

Measuring Odour Losses

Laboratories can utilize the Odotracker to manage odour losses in sample transportation and storage. For example H2S and NH3 readings after sampling and before olfactometric analysis will allow the laboratory determine the level of odour losses and determine if the sample is still valid.

Optional Controlling Module

Optional Controlling Module

Odotracker can accommodate an optional controller module that has a 10 amp dry contact relay output to signal if the summation of the customer specified combined scaled chemical readings exceeds a customer specified threshold setting. This relay contact can be used to trigger alarms or switch on ventilation fans, chemical scrubbers or other devices when a combined scaled chemical concentration for the two sensors is reached. A hysteresis span is provided for relay triggering and non-triggering.

Odotracker TR8 Instruction Videos

Scentroid OdoTrackerTR8



Can I custom order with different sensors?

Absolutely. We can install sensors to monitor CO, Methane, and many other chemicals. For a complete list of sensors please contact us.

Are the sensors replaceable?

Yes. The sensors can be easily replaced by the user in 5 minutes. No tools needed.

Will the sensors be affected by temperature?

There is temperature compensation circuitry and software built into Odotracker for compensation up to 50C.

How long will the sensors last?

Sensors will last 2 years. They are affordable and easy to replace by the user. The rest of Odotracker does not require replacement.


What our clients says about Odotracker

I use the Odotracker in pump stations and above manholes to determine emission points. It is extremely sensitive and reacts quickly to gases. Data logging feature is good to find peak times and the difference.

Air quality specialist Switzerland

Warranty and Services

24 Months Warranty

We are so confident of the reliability of our products that we are glad to offer our clients comprehensive 24 month full warranty.

Phone Support

Our highly professional customer services are here to serve you, for any technical issue reach them easily via phone: 416.479.0078 – Ext215

SME Support

Connecting you to the Subject Matter Experts! Our customer support is unique in that you can talk directly to the designer or programmer of each product.

Live Chat

If you feel more convenient to solve your technical issue via chat, No problem! reach our highly professional customer services through Live Chat.

Local Support

We have developed a vast growing network of distributors and repair facilities. To find your local support please check our distributors map.

Email Support

For any issue you can reach one of our engineers via email for any technical issue. For fast and efficient support simply email

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