The Wireless Telegraphy (Short Range Devices) (Exemption) Regulations 1993

Field Disturbance and Doppler Apparatus

3.  Wireless telegraphy apparatus designed or adapted—

(a) to produce a radiated field and respond to a variation in that field as a result of any intrusion or movement within that field by other devices, objects or persons in order to detect or monitor the movement of such devices, objects or persons; and

(b) so as to be capable of use only on the frequencies, and at a power or field strength, as the case may be, not exceeding the maximum for such frequencies, for each category of apparatus, specified in the table below—

Category	Description of apparatus	Frequencies	Maximum power (eirp or erp)	Maximum field strength at a distance of 10 metres
1	Apparatus designed solely to detect resonant circuits for use on a frequency of 13.56 MHz ± 0.2%	13.56 MHz ± 0.2%		4,500 μV/m
2	Apparatus (other than category 1 above) designed solely to detect resonant circuits	2-32 MHz		1,000 μV/m
3	Apparatus designed solely to detect resonant circuits for the purpose of the prevention of theft	888.000-889.6375 MHz 888.6875-889.000 MHz	500 mW erp
4	Apparatus designed solely for outdoor use	10.577-10.597 GHz	1 W eirp
5	Apparatus designed solely for indoor use	10.675-10.699 GHz	1 W eirp
6	Apparatus designed for fixed or portable applications	24.150-24.250 GHz	2 W eirp
7	Apparatus designed solely for use in a mobile application	24.250-24.350 GHz	2 W eirp
8	Anti-collision devices	31.80-33.40 GHz	5 W eirp
9	Any apparatus not within any category above	2.445-2.455 GHz	100 mW eirp