Breathalysers


	Breathalysers
	Advantages Infrared (IR) breathalysers give very accurate results so they can be admissible as evidence in court Fuel-cell and dichromate breathalysers are more suitable for quick roadside tests	Disadvantages They must be calibrated regularly to ensure that they give accurate readings They only give the composition of air breathed out IR breathalysers are less portable than other types Fuel-cell breathalysers cannot be used in court because there are too many sources of error
	Evaluation

Infrared (IR) breathalysers give very accurate results so they can be admissible as evidence in court
Fuel-cell and dichromate breathalysers are more suitable for quick roadside tests

They must be calibrated regularly to ensure that they give accurate readings
They only give the composition of air breathed out
IR breathalysers are less portable than other types
Fuel-cell breathalysers cannot be used in court because there are too many sources of error

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