July 1, 2000
Capacitance transmitter is compact in size and employs surface mount technology in an encapsulated module. It monitors level change by converting the movement of liquid refrigerant on the probe into a pulse wave form that is proportional to the level in the vessel. Series P from H.A. Phillips & Co. has 4 to 20 mA isolated output signal, maximum span of 4,000 pF, I0.25% repeatability, and minimum probe temperature of -60°F (-76°C). The transmitter utilizes a 24 VDC current loop for power source for signal transmission and is available for direct immersion into a vessel.
July/August 2000, RS# 228