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ES3 "Intelligent" Pressure and Level Transmitter
EX-1861
1. INTRODUCTION
KING-GAGE 5800 Series ES3 Transmitters are solid-state pressure and level transmitters using a
piezoresistive silicon sensor with a very high burst pressure. The sensor element is mounted in a
Stainless Steel foot. Inside the foot a temperature sensor is also mounted to provide active temper-
ature compensation at the point of measurement, to minimize temperature and position error. A
compact, robust Stainless Steel flush diaphragm minimizes the amount of fill fluid and reduces the
potential for damage. Diaphragms are laser welded and helium leak tested. A very small amount
of oil fills the chamber surrounding the sensor and transfers pressure from the flush mounted dia-
phragm to the sensor.
Pressure on the sensor element creates a very small deflection of the silicon substrate and bridge
network. The resulting strain in the silicon resistors causes a change in the bridge resistance that
is proportional to the pressure applied. The transmitter electronics detects this change in bridge
resistance and converts it into a measuring value. The amplifier system is based on a single Inte-
grated Circuit, which ensures a perfect linearity in the output, all within an accuracy of 0.2 %. The
flush diaphragm technology ensures reliable long-term stability.
2. DIMENSIONAL DRAWINGS
5800 Series ES3 Transmitters Transmitter
