Permanent Portable Reference Electrode

• Portable reference electrode for potential measurements in the field

• Maintenance-free construction
• 20 years' service life
• All wood plug
• Can be used in all positions
• Optional antifreeze protection to -35F (-36C)

	Housing Specifications 1 5/8 inch (4 cm) dia.x 6 inch (15 cm) long 1/4-20 threaded stud termination Shipping weight -- 1/2 lb. (1/4 kg)
	Model Designation Specify as EDI Model IT-xxx-ST xxx = Element type
	Element Type AGG - Saturated gelled Ag/AgCl CUG - Saturated gelled Cu/CuSO4
	Element Specifications Design life - 20+ yrs Shelf life - indefinite with end cap in place Max. Temp. - +140F (60C) Min. Temp. - +32F (0C)       -35F (-36C) with optional antifreeze

Design Compatibility
The Model IT is designed to take potential readings in any application where a standard, liquid-junction portable reference electrode is presently being used. Because the Model IT contains a gel rather than a liquid, it will neither leak nor require any refilling or cleaning. The hardwood plug offers several advantages over the conventional ceramic membrane. It will not clog as readily, it is resistant to salt blockage, and it can be reworked by light sanding or cutting if it becomes contaminanted with oil. All units have antifreeze protection in the gel so that they will not be damaged if exposed to temperatures down to -35F (-36C).