The Single Probe Alarm Module (SPAM) is an accurate and reliable instrument that provides positive indication of steam or water in high temperature and pressure applications. The SPAM measures resistance and reports the presence of either steam or water, based on fluid conductivity. The probe can be mounted in a column or a 1-½” Tee. The Swagelok® metal to metal seal assures a leak proof installation with no moving parts and the SPAM is an effective electronic replacement for mechanical float switches.
The electronic unit can be conveniently located up to 65 feet away from the probe with low conductivity water and 500 feet away with high conductivity water. Two Form-C contacts provide relay outputs for control circuits. LEDs indicate “WATER” or “STEAM” and a third LED flashes for “POWER/CLOCK”, to show that power is present and the clock is properly functioning.