# Council Regulation (EC) No 428/2009 of 5 May 2009 setting up a Community regime for the control of exports, transfer, brokering and transit of dual-use items (Recast), Division [2B351]: Toxic gas monitors and monitoring systems , and their dedicated detecting components, other than those specified in 1A004, as follows; and detectors; sensor devices; and replaceable sensor cartridges therefor:

Extent: E+W+S+N.I.

a..Designed for continuous operation and usable for the detection of chemical warfare agents or chemicals specified in 1C350, with a ‘minimum detection limit’ of less than 0,3 mg/m3; or
b..Designed for the detection of cholinesterase-inhibiting activity.
Technical Note:
The 'minimum detection limit' of a toxic gas monitor or monitoring system is the lowest detectable concentration of the analyte required to produce a signal greater than three times the standard deviation of the toxic gas monitor’s or monitoring system’s signal when measuring a blank sample.
In the case of toxic gas monitors or monitoring systems having a deadband or programmed zero suppression, the 'minimum detection limit' is the lowest detectable concentration required to produce a reading.

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Source: https://www.legislation.gov.uk/eur/2009/428/annex/I/division/4/division/2/division/2B351 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-428/annex-I/division-4/division-2/division-2B351
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.