Product Safety Datasheets

City Technology has Product Safety Datasheets (PSDS) for all products which detail the chemical hazards and properties of the components used within each sensor. The PSDS cover the following:

  • Composition / information on materials used
  • Hazard identification
  • First-aid measures
  • Fire fighting measures
  • Accidental release measures
  • Handling and storage
  • Exposure controls / personal protection
  • Physical and chemical properties
  • Stability and reactivity
  • Toxicological information
  • Disposal considerations

To find a PSDS, select the sensor from the drop down list below:


Health and Safety Guidelines

Electrochemical Gas Sensors


Electrochemical gas sensors are supplied as sealed units and in normal usage represent no chemical hazard in the sense of the "Control of Substances Hazardous to Health (COSHH) Regulations” and the Health and Safety at Work Act 1974. Chemical hazard can however arise if they are misused or abused when leakage may occur. Leakage may also occur in the event of a manufacturing fault. In order to avoid potential problems the following notes should be observed on storage, usage, handling and the disposal of unwanted sensors.

Oxygen CiTiceLs

Oxygen sensors contain a 4-molar potassium acetate solution which is corrosive. Normally this material would only leak out as a result of either mechanical damage (crushing or piercing) or by electrical misuse for example by attempting to input electrical charge. These sensors also contain small amounts of lead, lead oxide, platinum, silver, carbon and antimony some of which are toxic and/or mutagenic. If the user comes into contact with the oxygen sensor contents the affected area should be washed with a copious supply of water. Obtain medical advice.

As these sensors contain some highly toxic compounds, irrespective of physical condition they should be disposed of according to local waste management requirements and environmental legislation. They should not be burnt as they may evolve toxic fumes.

Toxic Gas CiTiceLs

The majority of toxic gas sensors contain sulphuric acid electrolyte and the chemical hazard is mainly related to the corrosive nature of this compound. These sensors also contain platinum, ruthenium, gold, silver, carbon some of which are toxic. Any skin or eye contact with the contents of these sensors should be washed immediately with copious amount of water. Obtain medical advice.

Design and Use

Electrochemical gas sensors are sealed units containing an aqueous electrolyte and a combination of other substances as detailed above. Provided these sensors are used only for their intended application they do not represent a chemical hazard. The sensors must not be exposed to temperatures outside the range -50°C to 60°C. Toxic gas sensors should not be exposed to organic vapours which may cause physical damage to the body of the sensor, for example 1, 2 dichloroethane.


For maximum shelf life sensors should be stored in the containers in which they are supplied in clean dry areas between 0°C and 20°C. They must not be stored in areas containing organic solvents or in flammable liquid stores.


Should any sensor be so severely damaged that leakage of the contents occurs then the following procedures should be adopted.

  1. Avoid skin contact with any liquid or internal component through use of protective gloves.
  2. Disconnect sensor if it is attached to any equipment.
  3. Use copious amounts of clean water to wash away any spilt liquid. This is particularly important in equipment where the sensor involved contains sulphuric acid or phosphoric acid because of the corrosive nature of these electrolytes.


All sensors contain toxic compounds irrespective of physical condition. They should be disposed of according to local waste management requirements and environmental legislation. They should not be burnt since they may evolve toxic fumes.