3
Model 351/352/353 Liquid Level Systems
Section 1
Section 1— Introduction
General
The Barton Liquid Level System provides accurate hydraulic transmission of
a process medium for measuring the level of liquids contained in a process
vessel. The self-contained system is typically mounted outside the vessel.
Floats, levers, pins, and other mechanical devices susceptible to contamina-
tion or wear are not required. Because the basic system is actuated by the
process media, local indication is possible without external power.
Barton Liquid Level Sensors can be purchased as a component of a factory-
built system, or as a part for a field-installed system. Sealed sensor systems
can be designed in the following configurations:
• a single sensor system (Model 351)
• a dual-sensor system (Model 352)
For applications involving corrosive fluids or tank temperatures above 200°F
(95°C), a dual-sensor configuration is recommended.
For applications involving unusual fill requirements due to liquid volumes or
high ambient temperatures, a Model 353 system is recommended. The Model
353 system can be designed with one or two sensors. See
for details.
Single-Sensor System
Process vessel
Single sensor
DPU
(shown
with
indicator)
Dual-Sensor System
Sensor
Sensor
Figure 1.1—Single-sensor and dual-sensor system configurations
IMPORTANT: In this manual, the term “sensor,” refers to a mechanical bellows as-
sembly and its pressure housing used to detect and transmit a hydraulic
or pneumatic signal to an electronic transmitter, mechanical indicator or
switch.
