Omega ISE-8725 & ISE-8726 are designed to aid in the measurement of lead ions. The 8725 is an ion electrode, while the 8726 is an ion combination glass electrode. Both are capable of being submerged in aqueous solutions to measure concentrations of lead related to the solution's potential, down to 10^-6 M. The devices can be used portably or with line operation and connect to either a pH/mV meter or ion meter for data read out.