• Underground storage tanks, buried pipelines, structures below concrete flooring

• 30 year design life with EDI's LongLife^TM gelled element
• Proprietary backfill mix to retain moisture and minimize migration of contaminants from the surrounding soil
• 50 ft. (15 m) of #14 AWG HMW/PE lead wire is standard; other lengths available

	Housing Specifications Size - 7 inch dia. x 16 inch long          (18 cm x 40 cm long) Shipping weight - 25 lb (12 kg)
	Element Specifications Design life - 30 years Shelf life - 1 year minimum Stability - ± 5 mV
	Element Types AGG - saturated gelled Ag/AgCl CUG - saturated gelled Cu/CuSO4
	Terminations SW - 50 feet (15 m) of #14 AWG HMW/PE LWnnn - nnn feet #14 AWG HMW/PE CWnnn - nnn feet of custom wire               (#12 HMWPE is the largest size wire that can be used in this model)
	Model Designation Specify as EDI Model UL-xxx-yy xxx = Element type  yy = Termination type

Design Compatability:
The Model UL is designed for long-term permanent use to obtain accurate potential measurements on buried structures. It is the best choice for those applications where easy installation is possible such as an open hole or trench. For those situations where there is limited access, the EDI Model US is recommended. A Cu/CuSO₄ element should be used in low chloride soils (<500 ppm) while a Ag/AgCl element is recommended for high chloride soil (>500 ppm) in order to obtain the longest possible life. Also see Model UL50 which has been optimized for a 50 year design life.