Fredricks (215)938-4432
Spectron (516)582-8200
Sentech Measurements(Spectron no. Cal rep) (707)421-1959


BTW, these sensors are electrolytic and very sensitive to DC. Don't
measure them with an ohmmeter. Only an AC signal should be used on them,
or they will charge up like a battery, and eventually turn into junk.

-bob