Borin Stelth 2 Solid-State Reference Electrode for buried and concrete service manufactured by Borin.

Description: 

• Never need recharging or recalibrating
• impregnated with membrane that keeps electrolytes from drying out or getting contaminated
• Trap hydrogen sulfide or excess chloride ions before they cause damage
• Let you know when you have dangerous levels of AC to deal with
• Can thrive in ALL environments, even those chemically detrimental to other reference electrodes
• Remain accurate for their lifetime
• Will not die every Winter
• Additional Borin Reference Electrodes available